CN105874727B - A kind of method and device for detecting optical signal to noise ratio - Google Patents

A kind of method and device for detecting optical signal to noise ratio Download PDF

Info

Publication number
CN105874727B
CN105874727B CN201480070041.6A CN201480070041A CN105874727B CN 105874727 B CN105874727 B CN 105874727B CN 201480070041 A CN201480070041 A CN 201480070041A CN 105874727 B CN105874727 B CN 105874727B
Authority
CN
China
Prior art keywords
signal
checked
optical signal
transmission
spectrum
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201480070041.6A
Other languages
Chinese (zh)
Other versions
CN105874727A (en
Inventor
李朝晖
马会肖
王大伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Publication of CN105874727A publication Critical patent/CN105874727A/en
Application granted granted Critical
Publication of CN105874727B publication Critical patent/CN105874727B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
    • H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
    • H04B10/0795—Performance monitoring; Measurement of transmission parameters
    • H04B10/07953—Monitoring or measuring OSNR, BER or Q

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)

Abstract

An embodiment of the present invention provides a kind of method and devices for detecting optical signal to noise ratio, are related to the communications field, for reducing the error of the optical signal to noise ratio of light signal to be checked.Described device includes：Signal acquiring unit, coherent reception unit, reference spectra acquiring unit and spectroscopy unit；Signal acquiring unit, for obtaining light signal to be checked；Coherent reception unit for detecting light signal to be checked on the first monitoring point, and obtains the luminous power spectrum of light signal to be checked；Reference spectra acquiring unit for obtaining the link model of optical signal transmission to be detected on the first monitoring point, and determines according to link model the response characteristic of the transmission link of light signal to be checked；It is additionally operable to obtain the first spectrum；And reference spectra is determined according to response characteristic and the first spectrum；Spectroscopy unit, for determining optical signal to noise ratio of the light signal to be checked on the first monitoring point according to the luminous power of light signal to be checked spectrum and reference spectra.The present invention is suitable for the scene of detection optical signal to noise ratio.

Description

A kind of method and device for detecting optical signal to noise ratio
Technical field
The present invention relates to the communications field more particularly to a kind of method and devices for detecting optical signal to noise ratio.
Background technology
In fiber optic communication systems, optical-fiber network is managed and monitored, it is necessary to important in optical-fiber network to realize Parameter is monitored, and in numerous parameters, optical signal to noise ratio can more accurately reflect the quality of optical-fiber network operating status, because This, optical signal to noise ratio becomes an important indicator for weighing quality of optical fiber link.
In the prior art, generally use spectroanalysis instrument obtains the power spectrum of the light signal to be checked of a certain channel, and Using the signal spectrum without any device that transmitter is launched as spectrum is referred to, so as to be believed according to the light to be detected of acquisition Number power spectrum and reference spectra calculate ratio in the power spectrum of light signal to be checked shared by optical signal power and optical noise power Example, and then calculate the optical signal to noise ratio of this light signal to be checked.
The signal without any device during calculating optical signal to noise ratio, launched using transmitter is stated in realization Spectrum with reference to spectrum as calculating the optical signal to noise ratio of this light signal to be checked, and the signal spectrum that transmitter is launched is in reality During transmission, it is necessary to by some devices with filter action, in this way, the signal spectrum that transmitter is launched is being transmitted It can change in the process, so as to use the signal spectrum without any device as the optical signal to noise ratio calculated with reference to spectrum It is different from the optical signal to noise ratio during actual transmissions, i.e., it is used as using the signal spectrum without any device and is calculated with reference to spectrum The error of the optical signal to noise ratio of the light signal to be checked gone out increases.
The content of the invention
The embodiment of the present invention provides a kind of method and device for detecting optical signal to noise ratio, for reducing light signal to be checked The error of optical signal to noise ratio.
In order to achieve the above objectives, the embodiment of the present invention adopts the following technical scheme that：
In a first aspect, an embodiment of the present invention provides it is a kind of detect optical signal to noise ratio device, including：Signal acquiring unit, Coherent reception unit, reference spectra acquiring unit and spectroscopy unit；Wherein, the signal acquiring unit is treated for obtaining Detect optical signal；The coherent reception unit, for detecting the light signal to be checked on the first monitoring point, and described in acquisition The luminous power spectrum of light signal to be checked；The reference spectra acquiring unit, for being treated described in the acquisition on first monitoring point The link model of optical signal transmission is detected, and determines according to the link model sound of the transmission link of the light signal to be checked Answer characteristic；The reference spectra acquiring unit is additionally operable to obtain the first spectrum；Wherein, first spectrum emits for transmitting terminal The signal spectrum without any device；The reference spectra acquiring unit is additionally operable to according to the light signal to be checked The response characteristic of transmission link and first spectrum determine reference spectra；The spectroscopy unit, for being treated according to The luminous power spectrum of detection optical signal and the reference spectra determine light of the light signal to be checked on first monitoring point Signal-to-noise ratio.
In the first possible realization method of first aspect, the reference spectra acquiring unit is additionally operable to acquisition One spectrum includes：The reference spectra acquiring unit, specifically for the modulation format of the acquisition light signal to be checked, and according to The modulation format determines first spectrum；Alternatively, the reference spectra acquiring unit, described to be detected specifically for determining Whether optical signal carries pilot signal, when the definite light signal to be checked carries the pilot signal, according to described Pilot signal determines first spectrum.
With reference to first aspect or the first possible realization method of first aspect, second in first aspect are possible Realization method in, described device further includes：Storage unit；The storage unit, for prestoring the light letter to be detected At least one network node that the link model of number transmission or while prestoring the optical signal transmission to be detected are passed through Model；The reference spectra acquiring unit, for obtaining the chain of the optical signal transmission to be detected on first monitoring point Road model includes：The reference spectra acquiring unit, specifically for being obtained on first monitoring point from the storage unit Take the link model of the optical signal transmission to be detected；Alternatively, the reference spectra acquiring unit, specifically for described first It is stored in the network node of the light signal process to be checked obtained on monitoring point according to network side and the storage unit The model of at least one network node determines the link model of the optical signal transmission to be detected.
With reference to first aspect or the possible realization method of first or second kind of first aspect, the 3rd of first aspect the In the possible realization method of kind, the coherent reception unit includes：Polarization Control Module, local oscillator laser module, the first polarization point Beam module, the second polarization beam splitting module, the first photomixing module, the second photomixing module, photoelectric detection module, analog-to-digital conversion mould Block and digital signal processing module；The coherent reception unit includes for obtaining the luminous power of the light signal to be checked spectrum： The local oscillator laser module, for emitting local oscillator optical signal with first frequency interval；The first polarization beam splitting module, for inciting somebody to action The light signal to be checked is divided into mutually orthogonal the first optical signal and the second optical signal, and by first optical signal and described Second optical signal is separately input into the first photomixing module and the second photomixing module；The second polarization beam splitting mould Block, for the local oscillator optical signal to be divided into mutually orthogonal the first local oscillator optical signal and the second local oscillator optical signal, and by described in First local oscillator optical signal and the second local oscillator optical signal are separately input into the first photomixing module and second light mixes Frequency module；The Polarization Control Module, for controlling first optical signal and the first local oscillator optical signal, so that described The direction of first optical signal and the first local oscillator optical signal is consistent, and controls second optical signal and the second local oscillator light Signal, so that the direction of second optical signal and the second local oscillator optical signal is consistent；The first photomixing module is used It is mixed in by first optical signal and the first local oscillator optical signal, obtains the first mixed frequency signal, and by described first Mixed frequency signal is inputted to the photoelectric detection module；Wherein, first mixed frequency signal includes at least two mutually orthogonal light Signal；The second photomixing module for second optical signal and the second local oscillator optical signal to be mixed, obtains Second mixed frequency signal, and second mixed frequency signal is inputted to the photoelectric detection module；Wherein, second mixed frequency signal Including at least two mutually orthogonal optical signals；The photoelectric detection module, for first mixed frequency signal and described Two mixed frequency signals are detected, and obtain the simulation optical power signals of first mixed frequency signal and second mixed frequency signal, And the simulation optical power signals are inputted to the analog-to-digital conversion module；The analog-to-digital conversion module, for by the simulation Optical power signals are converted to digital light power signal, and the digital light power signal is inputted to the Digital Signal Processing mould Block；The digital signal processing module for the digital light power signal to be carried out the first processing, obtains the light to be detected The luminous power spectrum of signal；Wherein, first processing includes Fast Fourier Transform (FFT) FFT, frequency spectrum splicing, capability correction and coefficient Compensation.
With reference to first aspect or first to the 3rd any possible realization method of first aspect, in first aspect In 4th kind of possible realization method, the signal acquiring unit includes for obtaining light signal to be checked：The signal acquisition Unit, specifically for obtaining the light signal to be checked of one-way transmission；Alternatively, the signal acquiring unit, specifically for obtaining Take the light signal to be checked of uplink transmission and the light signal to be checked of downlink transmission.
The 4th kind of possible realization method with reference to first aspect, in the 5th kind of possible realization method of first aspect In, the reference spectra acquiring unit includes：Uplink reference spectra acquisition module and descending reference spectrum acquisition module；On described Row reference spectra acquisition module, for obtaining the optical signal transmission to be detected of uplink on first monitoring point Link model, and determine according to the link model response of the transmission link of the light signal to be checked of the uplink Characteristic；The uplink reference spectra acquisition module is additionally operable to obtain the first spectrum；Wherein, first spectrum is sent out for transmitting terminal The signal spectrum without any node penetrated；The uplink reference spectra acquisition module, is additionally operable to according to the uplink The light signal to be checked transmission link response characteristic and first spectrum determine reference spectra；The descending reference Spectrum acquisition module, for obtaining the link mould of the optical signal transmission to be detected of downlink on first monitoring point Type, and determine according to the link model response characteristic of the transmission link of the light signal to be checked of the downlink； The descending reference spectrum acquisition module is additionally operable to obtain the first spectrum；Wherein, first spectrum emits not for transmitting terminal By the signal spectrum of any node；The descending reference spectrum acquisition module, is additionally operable to according to the downlink The response characteristic of the transmission link of light signal to be checked and first spectrum determine reference spectra.
Second aspect, an embodiment of the present invention provides it is a kind of detect optical signal to noise ratio method, including：Detection device acquisition is treated Detect optical signal；The detection device obtains the luminous power spectrum of the light signal to be checked on the first monitoring point；The detection Device obtains the link model of the optical signal transmission to be detected on first monitoring point, and true according to the link model The response characteristic of the transmission link of the fixed light signal to be checked；The detection device obtains the first spectrum；Wherein, described first Spectrum is the signal spectrum without any device of transmitting terminal transmitting；The detection device is according to the light signal to be checked The response characteristic of transmission link and first spectrum determine reference spectra；The detection device is according to the light signal to be checked Luminous power spectrum and the reference spectra determine optical signal to noise ratio of the light signal to be checked on first monitoring point.
In the first possible realization method of second aspect, the detection device, which obtains the first spectrum, to be included：It is described Detection device obtains the modulation format of the light signal to be checked, and determines first spectrum according to the modulation format；Or Person, the detection device determine whether the light signal to be checked carries pilot signal, in the definite light signal to be checked When carrying the pilot signal, first spectrum is determined according to the pilot signal.
With reference to the possible realization method of the first of second aspect or second aspect, second in second aspect may Realization method in, the detection device obtains the link model of the optical signal transmission to be detected on first monitoring point Including：The detection device obtains the link mould of the pre-stored optical signal transmission to be detected on first monitoring point Type；Alternatively, what the light signal to be checked that the detection device obtains on first monitoring point according to network side passed through The model of network node and pre-stored at least one network node determines the link model of the optical signal transmission to be detected.
With reference to the possible realization method of first or second kind of second aspect or second aspect, the 3rd of second aspect the In the possible realization method of kind, the detection device obtains the luminous power spectrum bag of the light signal to be checked on the first monitoring point It includes：The detection device emits local oscillator optical signal with first frequency interval, and the local oscillator optical signal of transmitting is divided into mutually orthogonal The first local oscillator optical signal and the second local oscillator optical signal；The light signal to be checked of acquisition is divided into mutually by the detection device Orthogonal the first optical signal and the second optical signal, and the direction of first optical signal and the first local oscillator optical signal is controlled, So that the direction of first optical signal is consistent with the direction of the first local oscillator optical signal, and control second optical signal With the direction of the second local oscillator optical signal so that the side of the direction of second optical signal and the second local oscillator optical signal To identical；First optical signal and the first local oscillator optical signal are mixed by the detection device, obtain the first mixing Signal, and second optical signal and the second local oscillator optical signal are mixed, obtain the second mixed frequency signal；Wherein, institute Stating the first mixed frequency signal includes at least two mutually orthogonal optical signals；Second mixed frequency signal includes at least two mutually just The optical signal of friendship；The detection device is detected first mixed frequency signal and second mixed frequency signal, and obtains institute The simulation optical power signals of the first mixed frequency signal and second mixed frequency signal are stated, and the simulation optical power signals are converted to Digital light power signal；The digital light power signal is carried out the first processing by the detection device, obtains the light to be detected The luminous power spectrum of signal；Wherein, first processing includes Fast Fourier Transform (FFT) FFT, frequency spectrum splicing, capability correction and coefficient Compensation.
With reference to first to the 3rd any possible realization method of second aspect or second aspect, in second aspect In 4th kind of possible realization method, the detection device, which obtains light signal to be checked, to be included：The detection device obtains unidirectional The light signal to be checked of transmission；Alternatively, the detection device obtain uplink transmission the light signal to be checked and The light signal to be checked of downlink transmission.
With reference to the 4th kind of possible realization method of second aspect, in the 5th kind of possible realization method of second aspect In, the detection device obtains the link model of the optical signal transmission to be detected on first monitoring point, and according to institute It states link model and determines that the response characteristic of the transmission link of the light signal to be checked includes：The detection device is described first The link model of the optical signal transmission to be detected of the uplink transmission is obtained on monitoring point, and it is true according to the link model The response characteristic of the transmission link of the light signal to be checked of the fixed uplink transmission；Alternatively, the detection device is described The link model of the optical signal transmission to be detected of the downlink transmission is obtained on first monitoring point, and according to the link mould Type determines the response characteristic of the transmission link of the light signal to be checked of the downlink transmission；The detection device is according to The response characteristic of the transmission link of light signal to be checked and first spectrum determine that reference spectra includes：The detection device root The uplink transmission is determined according to the luminous power spectrum and the reference spectra of the light signal to be checked of uplink transmission Optical signal to noise ratio of the light signal to be checked on first monitoring point；Alternatively, the detection device is according to the downlink The luminous power spectrum of the light signal to be checked of transmission and the reference spectra determine the light signal to be checked of the downlink transmission Optical signal to noise ratio on first monitoring point.
The third aspect, an embodiment of the present invention provides a kind of detection device, including：Communication interface, it is to be detected for obtaining Optical signal；The communication interface is additionally operable to obtain the luminous power spectrum of the light signal to be checked on the first monitoring point；It is described logical Believe interface, be additionally operable to obtain the link model of the optical signal transmission to be detected on first monitoring point；Processor is used for The link model obtained according to the communication interface determines the response characteristic of the transmission link of the light signal to be checked；Institute Communication interface is stated, is additionally operable to obtain the first spectrum；Wherein, first spectrum is transmitting terminal transmitting without any network section The signal spectrum of point；The processor is additionally operable to first spectrum and described to be detected obtained according to the communication interface The response characteristic of the transmission link of optical signal determines reference spectra；The processor is additionally operable to according to the reference spectra and institute The luminous power spectrum for stating the light signal to be checked of communication interface acquisition determines the light signal to be checked in the described first monitoring Optical signal to noise ratio on point.
In the first possible realization method of the third aspect, the communication interface is described to be checked specifically for obtaining The modulation format of light signal, and first spectrum is determined according to the modulation format；Alternatively, the communication interface, specifically For determining whether the light signal to be checked carries pilot signal, described lead is carried in the definite light signal to be checked During frequency signal, first spectrum is determined according to the pilot signal.
With reference to the possible realization method of the first of the third aspect or the third aspect, second in the third aspect may Realization method in, described device further includes：Memory；The memory passes for prestoring the light signal to be checked The mould at least one network node that defeated link model or while prestoring the optical signal transmission to be detected are passed through Type；The communication interface, the link model for obtaining the optical signal transmission to be detected on first monitoring point include： The communication interface, specifically for obtaining the optical signal transmission to be detected from the memory on first monitoring point Link model；Alternatively, the communication interface, specifically for being treated on first monitoring point according to obtaining network side The model of at least one network node stored in network node and the memory that detection optical signal passes through determines institute State the link model of optical signal transmission to be detected.
With reference to the possible realization method of first or second kind of the third aspect or the third aspect, the 3rd of the third aspect the It plants in possible realization method, the communication interface, is additionally operable to obtain the light of the light signal to be checked on the first monitoring point Power spectrum includes：The communication interface, specifically for emitting local oscillator optical signal with first frequency interval, and by the local oscillator light of transmitting Signal is divided into mutually orthogonal the first local oscillator optical signal and the second local oscillator optical signal；The light signal to be checked of acquisition is divided into Mutually orthogonal the first optical signal and the second optical signal, and control the side of first optical signal and the first local oscillator optical signal To so that the direction of first optical signal is consistent with the direction of the first local oscillator optical signal, and controlling second light The direction of signal and the second local oscillator optical signal, so that the direction of second optical signal and the second local oscillator optical signal Direction it is identical；First optical signal and the first local oscillator optical signal are mixed, obtain the first mixed frequency signal, and will Second optical signal is mixed with the second local oscillator optical signal, obtains the second mixed frequency signal；Wherein, first mixing Signal includes at least two mutually orthogonal optical signals；Second mixed frequency signal includes at least two mutually orthogonal light letters Number；And first mixed frequency signal and second mixed frequency signal are detected, and obtain first mixed frequency signal and institute The simulation optical power signals of the second mixed frequency signal are stated, and the simulation optical power signals are converted into digital light power signal；And The digital light power signal is subjected to the first processing, obtains the luminous power spectrum of the light signal to be checked；Wherein, described first Processing includes Fast Fourier Transform (FFT) FFT, frequency spectrum splicing, capability correction and compensating coefficient.
With reference to first to the 3rd any possible realization method of the third aspect or the third aspect, in the third aspect In 4th kind of possible realization method, the communication interface includes for obtaining light signal to be checked：The communication interface, tool Body is used to obtain the light signal to be checked of one-way transmission；Alternatively, the communication interface, passes specifically for obtaining uplink The defeated light signal to be checked and the light signal to be checked of downlink transmission.
With reference to the 4th kind of possible realization method of the third aspect, in the 5th kind of possible realization method of the third aspect In, the communication interface, the light signal to be checked for being additionally operable to obtain the uplink transmission on first monitoring point passes Defeated link model；The processor, the uplink for being additionally operable to be obtained according to the communication interface are transmitted to be detected The link model of optical signal transmission determines that the response of the transmission link of the light signal to be checked of the uplink transmission is special Property；The processor, be additionally operable to according to the uplink transmit light signal to be checked transmission link response characteristic and First spectrum that the communication interface obtains determines reference spectra；The communication interface is additionally operable in the described first monitoring The link model of the optical signal transmission to be detected of the downlink transmission is obtained on point；The processor is additionally operable to according to institute The link model for stating the optical signal transmission to be detected of the downlink transmission of communication interface acquisition determines the downlink The response characteristic of the transmission link of the light signal to be checked of link transmission；The processor is additionally operable to according to the downlink First spectrum that the response characteristic and the communication interface of the transmission link of the light signal to be checked of transmission obtain determines to join Examine spectrum.
An embodiment of the present invention provides a kind of method and device for detecting optical signal to noise ratio, described device includes：Signal acquisition Unit, coherent reception unit, reference spectra acquiring unit and spectroscopy unit, signal acquiring unit are used to obtain light to be detected Signal, coherent reception unit obtain the light work(of light signal to be checked for detecting light signal to be checked on the first monitoring point Rate is composed, and reference spectra acquiring unit is used to obtain the link model and the first light of optical signal transmission to be detected on the first monitoring point Spectrum, and determine according to the link model of acquisition the response characteristic of the transmission link of light signal to be checked, and then according to light to be detected The response characteristic of the transmission link of signal determines reference spectra with the first spectrum, so that spectroscopy unit is according to be detected The luminous power spectrum and reference spectra of optical signal determine optical signal to noise ratio of the light signal to be checked on the first monitoring point.In this way, spectrum The reference spectra that analytic unit is used when determining the optical signal to noise ratio of light signal to be checked is the link according to light signal to be checked What model and the first spectrum determined, so as to reduce the error of the optical signal to noise ratio of light signal to be checked.
Description of the drawings
It in order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be in embodiment or description of the prior art Required attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only some realities of the present invention Example is applied, it for those of ordinary skill in the art, without creative efforts, can also be according to these attached drawings Obtain other attached drawings.
Fig. 1 is a kind of functional schematic of detection device provided in an embodiment of the present invention；
Fig. 2 is the functional schematic of the coherent reception unit of detection device shown in FIG. 1；
Fig. 3 is the functional schematic of another detection device provided in an embodiment of the present invention；
Fig. 4 is the functional schematic of the reference spectra acquiring unit of detection device shown in FIG. 1；
Fig. 5 is a kind of flow diagram of method for detecting optical signal to noise ratio provided in an embodiment of the present invention；
Fig. 6 is a kind of structure diagram of detection device provided in an embodiment of the present invention.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, those of ordinary skill in the art are obtained every other without creative efforts Embodiment belongs to the scope of protection of the invention.
An embodiment of the present invention provides it is a kind of detect optical signal to noise ratio device, including：Signal acquiring unit 101, phase stem grafting Receive unit 102, reference spectra acquiring unit 103 and spectroscopy unit 104.Wherein,
The signal acquiring unit 101, for obtaining light signal to be checked.
It should be noted that difference of the signal acquiring unit 101 according to network system, the light signal to be checked of acquisition Also it is different.
Specifically, in DWDM (Dense Wavelength Division Multiplexing, dense wave division multipurpose) net In network system, the signal acquiring unit 101, specifically for obtaining the light signal to be checked of one-way transmission.
Wherein, the light signal to be checked of the one-way transmission is the optical signal transmitted in fiber link.
In simple optical fiber in the network system with two-way transmission signals, such as PON (Passive optical Network, for no reason at all fiber optic network) in network system, the signal acquiring unit 101, specifically for obtaining uplink transmission The light signal to be checked and downlink transmission the light signal to be checked.
Wherein, uplink refers to ONU (Optical Network Unit, optical network unit) to OLT (Optical Line Terminal, optical line terminal) send signal when link；Chain when downlink refers to from OLT to ONU transmission signals Road.
The coherent reception unit 102, for detecting the light signal to be checked on the first monitoring point, and described in acquisition The luminous power spectrum of light signal to be checked.
Wherein, the first monitoring point is the signal of transmitting terminal transmitting at least through in the fiber link after a network node One point.
Further, the coherent reception unit 102, as shown in Fig. 2, including：Polarization Control Module 1021, local oscillator laser Module 1022, the first polarization beam splitting module 1023, the second polarization beam splitting module 1024, the first photomixing module 1025, the second light Frequency mixing module 1026, photoelectric detection module 1027, analog-to-digital conversion module 1028 and digital signal processing module 1029.
Wherein, the local oscillator laser module 1022, for emitting local oscillator optical signal with first frequency interval.
The first polarization beam splitting module 1023 is believed for the light signal to be checked to be divided into the first mutually orthogonal light Number and the second optical signal, and first optical signal and second optical signal are separately input into the first photomixing module 1025 and the second photomixing module 1026.
The second polarization beam splitting module 1024, for the local oscillator optical signal to be divided into the first mutually orthogonal local oscillator light Signal and the second local oscillator optical signal, and the first local oscillator optical signal and the second local oscillator optical signal be separately input into described First photomixing module 1025 and the second photomixing module 1026.
The Polarization Control Module 1021, for controlling first optical signal and the first local oscillator optical signal, so that It is consistent to obtain the direction of first optical signal and the first local oscillator optical signal, and controls second optical signal and described second Local oscillator optical signal, so that the direction of second optical signal and the second local oscillator optical signal is consistent.
The first photomixing module 1025, for first optical signal and the first local oscillator optical signal to be mixed Frequently, the first mixed frequency signal is obtained, and first mixed frequency signal is inputted to the photoelectric detection module 1027.Wherein, it is described First mixed frequency signal includes at least two mutually orthogonal optical signals.
The second photomixing module 1026, for second optical signal and the second local oscillator optical signal to be mixed Frequently, the second mixed frequency signal is obtained, and second mixed frequency signal is inputted to the photoelectric detection module.Wherein, described second Mixed frequency signal includes at least two mutually orthogonal optical signals.
The photoelectric detection module 1027, for being examined to first mixed frequency signal and second mixed frequency signal It surveys, and obtains the simulation optical power signals of first mixed frequency signal and second mixed frequency signal, and by the simulated light work( Rate signal is inputted to the analog-to-digital conversion module 1028.
The analog-to-digital conversion module 1028, for the simulation optical power signals to be converted to digital light power signal, and The digital light power signal is inputted to the digital signal processing module 1029；
The digital signal processing module 1029 for the digital light power signal to be carried out the first processing, obtains institute State the luminous power spectrum of light signal to be checked.
Wherein, first processing includes FFT (Fast Fourier Transform, Fast Fourier Transform (FFT)), frequency spectrum Splicing, capability correction and compensating coefficient.
Specifically, in DWDM network systems, the local oscillator laser module 1022 with certain step-size change carrier frequency, And local oscillator optical signal is emitted with the carrier frequency after change；The first polarization beam splitting module 1023 is by the to be detected of one-way transmission Optical signal is divided into two mutually orthogonal the first optical signals and the second optical signal, and the first optical signal and the second optical signal are distinguished It is sent into the first photomixing module 1025 and the second photomixing module 1026；The second polarization beam splitting module 1024 will The local oscillator optical signal that the local oscillator laser module 1022 emits is divided into two the first mutually orthogonal local oscillator optical signals and second Shake optical signal, and the first local oscillator optical signal and the second local oscillator optical signal are respectively fed to the first photomixing module 1025 and institute State the second photomixing module 1026；The Polarization Control Module 1021 controls the side of the first optical signal and the first local oscillator optical signal To so that the direction of the first optical signal is identical with the direction of the first local oscillator optical signal, and controls the second optical signal and the second local oscillator The direction of optical signal so that the direction of the second optical signal is identical with the direction of the second local oscillator optical signal；The first photomixing mould The first optical signal received and the first local oscillator optical signal are mixed by block 1025, obtain the light letter of at least two quadrature in phases Number, and the optical signal of at least two quadrature in phases is respectively fed to each described photoelectric detection module 1027；Second light The second optical signal received and the second local oscillator optical signal are mixed by frequency mixing module 1026, obtain at least two quadrature in phases Optical signal, and the optical signal of at least two quadrature in phases is respectively fed to each described photoelectric detection module 1027；It is described The signal received is detected by photoelectric detection module 1027, and determines the simulation optical power signals of the signal received, And the simulation optical power signals of the signal received of calculating are sent into the analog-to-digital conversion module 1028；The analog-to-digital conversion mould Block 1028 converts the simulation optical power signals of input, so as to obtain the digital light power signal of optical signal, and will obtain Digital light power signal input to the digital signal processing module 1029；The digital signal processing module 1029 will receive The digital light power signal arrived carries out FFT transform, and frequency spectrum splices, and after capability correction and compensating coefficient processing, is unidirectionally passed The luminous power spectrum of defeated light signal to be checked.
It should be noted that in simple optical fiber in the network system with two-way transmission signals, the coherent reception list Member 102 obtains the luminous power spectrum of the light signal to be checked of uplink and the light to be detected letter of downlink on the first monitoring point Number method and the coherent reception unit 102 of luminous power spectrum obtain one-way transmission on the first monitoring point in dwdm system Light signal to be checked luminous power spectrum method it is similar, the present invention details are not described herein.
The reference spectra acquiring unit 103 passes for obtaining the light signal to be checked on first monitoring point Defeated link model, and determine according to the link model response characteristic of the transmission link of the light signal to be checked.
Wherein, the link model be the optical signal transmission to be detected when by all-network node set.
Further, the detection device, as shown in figure 3, further including：Storage unit 105.
The storage unit 105, for prestoring the link model of the optical signal transmission to be detected；
Alternatively, the model of at least one network node passed through when prestoring the optical signal transmission to be detected.
It should be noted that difference of the reference spectra acquiring unit 103 according to the network system of application, first It is different that the link model of optical signal transmission to be detected is obtained on monitoring point, it is specific as follows：
In DWDM network systems, the reference spectra acquiring unit 103 is single for being obtained on first monitoring point To the link model of the optical signal transmission to be detected of transmission, and waiting for the one-way transmission is determined according to the link model Detect the response characteristic of the transmission link of optical signal.
Specifically, in DWDM network systems, the reference spectra acquiring unit 103 obtains unidirectionally on the first monitoring point During the link model of the optical signal transmission to be detected of transmission, for the difference of the parameter configuration of DWDM network systems, acquisition side Method is also different, specific as follows：
The reference spectra acquiring unit 103, specifically for the institute obtained on first monitoring point according to network side State the model of the network node of light signal process to be checked and at least one network node of the storage of the storage unit 105 Determine the link model of the optical signal transmission to be detected.
That is, when the parameter configuration of DWDM network systems is dynamic configuration, transmitting terminal is in transmitting different wave length , it is necessary to which the mode that the optical signal of different wave length is respectively adopted to coding adds different optical labels before optical signal, and for one For the optical signal of a wavelength, this optical label is required to first be decoded by network side when passing through each network node, and It is recompiled, generates new optical label.
Therefore, network side in the decoding of each network node and recompiles information life according to the optical signal of a wavelength Launch each network node information passed through into the optical signal of a wavelength from transmitting terminal, and by the light of a wavelength Signal launches each network node information passed through from transmitting terminal and feeds back to the reference spectra acquiring unit 103, The light signal to be checked of one-way transmission from transmitting terminal is launched to each network node information passed through and feeds back to institute State reference spectra acquiring unit 103.At this point, what the reference spectra acquiring unit 103 basis on the first monitoring point received Each network node information that the light signal to be checked of one-way transmission is passed through determines the light signal institute to be checked of one-way transmission Each network node and the number of each network node passed through, so as to according to each network node and each network The number of node obtains each network node that the light signal to be checked of one-way transmission is passed through in the storage unit 105 Model, and then waiting for one-way transmission is determined according to the model of each network node information and each network node of acquisition The link model of optical signal transmission, and the link model of the optical signal transmission to be detected according to one-way transmission are detected, is determined unidirectional The light signal to be checked of transmission is when by each network node, the variation of signal spectrum generation, so as to according to light to be detected Signal changes to determine the transmission link of the light signal to be checked of one-way transmission by the signal spectrum of each network node Response characteristic.
It should be noted that when the parameter configuration of DWDM network systems is dynamic configuration, the reference spectra obtains single Member 103 can also according to other methods obtain one-way transmission optical signal transmission to be detected link model, the present invention to this not It is limited.
Alternatively, the reference spectra acquiring unit 103, specifically on first monitoring point from the storage unit The link model of the optical signal transmission to be detected is obtained in 105.
That is, when the parameter configuration of DWDM network systems is fixed configurations, then the light to be detected of one-way transmission is believed Number network node passed through before the first monitoring point is fixed, so can be pre- in the reference spectra acquiring unit 103 The link model that the light signal to be checked of one-way transmission passes through before the first monitoring point is first stored in the storage unit 105 In, thus after the modulation format of optical signal transmission to be detected of one-way transmission is obtained, directly from the storage unit 105 Obtain the link model of the optical signal transmission to be detected of one-way transmission, and the chain of the optical signal transmission to be detected according to one-way transmission Road model determines the light signal to be checked of one-way transmission when by each network node, the variation that signal spectrum occurs, from And change to determine that the light to be detected of one-way transmission is believed by the signal spectrum of each network node according to light signal to be checked Number transmission link response characteristic.
Illustratively, it is assumed that the network node that the light signal to be checked of one-way transmission passes through before the first monitoring point has 3 It is a, it is respectively that the first ROADM (insert by Reconfigurable Optical Add-drop Multiplexer, restructural light point Multiplexer), the 2nd ROADM and optical signal amplifier, and the light signal to be checked of one-way transmission passes through before the first monitoring point Network node order for the first ROADM, optical signal amplifier and the 2nd ROADM, then in the storage unit 105 in advance The light signal to be checked of one-way transmission is stored before the first monitoring point successively by the first ROADM, optical signal amplifier and the The link model of two ROADM, thus after the modulation format of optical signal transmission to be detected of one-way transmission is obtained, directly from institute The light signal to be checked that one-way transmission is obtained in storage unit 105 is stated before the first monitoring point successively by the first ROADM, light The link model of signal amplifier and the 2nd ROADM, and the link model of the optical signal transmission to be detected according to one-way transmission, really Determine signal spectrum hair of the light signal to be checked of one-way transmission when passing through the first ROADM, optical signal amplifier and two ROADM Raw variation, so as to pass through flashlight when the first ROADM, optical signal amplifier and two ROADM according to light signal to be checked The response characteristic for changing to determine the transmission link of the light signal to be checked of one-way transmission of spectrum.
Further, in simple optical fiber in the network system with two-way transmission signals, the reference spectra obtains single Member 103, as shown in figure 4, including：Uplink reference spectra acquisition module 1031 and descending reference spectrum acquisition module 1032.
The uplink reference spectra acquisition module 1031 passes for obtaining the uplink on first monitoring point The link model of defeated optical signal transmission to be detected, and determine that the uplink is transmitted to be detected according to the link model The response characteristic of the transmission link of optical signal.
Specifically, the uplink reference spectra acquisition module 1031 obtains the optical signal transmission to be detected of uplink transmission Link model, and according to this link model determine uplink transmit light signal to be checked transmission link response characteristic Method and above-mentioned DWDM network systems in obtain one-way transmission optical signal transmission to be detected link model, and according to this chain Road model determines that the method for the response characteristic of the transmission link of the light signal to be checked of one-way transmission is similar, and the present invention is herein no longer It repeats.
The descending reference spectrum acquisition module 1032 passes for obtaining the downlink on first monitoring point The link model of defeated optical signal transmission to be detected, and the to be detected of the downlink transmission is determined according to the link model The response characteristic of the transmission link of optical signal.
Specifically, the descending reference spectrum acquisition module 1032 obtains the optical signal transmission to be detected of downlink transmission Link model, and determine according to this link model the response characteristic of the transmission link of the light signal to be checked of downlink transmission Method and above-mentioned DWDM network systems in obtain one-way transmission optical signal transmission to be detected link model, and according to this chain Road model determines that the method for the response characteristic of the transmission link of the light signal to be checked of one-way transmission is similar, and the present invention is herein no longer It repeats.
The reference spectra acquiring unit 103 is additionally operable to obtain the first spectrum.
Wherein, first spectrum is the signal spectrum without any node of transmitting terminal transmitting.
Specifically, in DWDM network systems, if the modulation format of the light signal to be checked of transmitting terminal transmitting only has one kind, Then the reference spectra acquiring unit 103 directly acquires the first spectrum.
If the modulation format of the light signal to be checked of transmitting terminal transmitting is at least one, the reference spectra acquiring unit The method of 103 the first spectrum of acquisition has following several method.
First method, the reference spectra acquiring unit 103, specifically for obtaining the modulation of the light signal to be checked Form, and first spectrum is determined according to the modulation format.
Wherein, the transformat used when the modulation format is the optical signal transmission to be detected of the one-way transmission.
That is, the reference spectra acquiring unit 103 gathers the light to be detected of one-way transmission on the first monitoring point Signal, and using the light signal to be checked of the one-way transmission collected as the input signal of itself, obtained by the reference spectra Neuroid in unit 103 extracts characteristic parameter in the input signal first, for example, being carried to the temporal signatures of signal It takes, temporal signatures include the histogram or other statistical parameters of the instantaneous amplitude of signal, instantaneous phase or instantaneous frequency, so Input vector is formed according to the characteristic parameter sample extracted afterwards, and using input vector as the input of neuroid, and then Network is trained according to certain neural network function, works as train epochs, training error, training time or training Grad When reaching default threshold value, training is automatic to be terminated, and returns to the neutral net after training, and by trained neutral net into Row matching, i.e., compare the output of trained neutral net and pre-stored sample, minimum accurate using mean square error A sample most like with the output of trained neutral net is then found out, and using this sample as with reference to spectrum acquiring unit The modulation format of the light signal to be checked of 103 one-way transmissions obtained, so that it is determined that the light signal to be checked of one-way transmission is not It is the first spectrum by the signal spectrum of any network node.
Second method, the reference spectra acquiring unit 103, specifically for determining whether the light signal to be checked is taken With pilot signal, when the definite light signal to be checked carries the pilot signal, determined according to the pilot signal First spectrum.
That is, the reference spectra acquiring unit 103, determines the to be detected of one-way transmission on the first monitoring point Whether pilot signal is carried in optical signal, when the light signal to be checked for determining one-way transmission carries pilot signal, then root The modulation format of the light signal to be checked of one-way transmission is determined according to the frequency of pilot signal, so that it is determined that one-way transmission is to be detected Optical signal is in the signal spectrum without any network node, as the first spectrum.
It should be noted that transmitting terminal can emit the optical signal of different modulating form, and before optical signal is emitted, The pilot signal of different frequency is carried in the optical signal of different modulating form, in this way, the reference spectra acquiring unit 103 is just The modulation format of the light signal to be checked of one-way transmission can be determined according to the frequency of the pilot signal of carrying.
It should be noted that the reference spectra acquiring unit 103 can also obtain one-way transmission according to other methods Light signal to be checked modulation format, the present invention it is without limitation.
It should be noted that in simple optical fiber in the network system with two-way transmission signals, the uplink reference light Spectrum acquiring unit 1031 obtains the method for the first spectrum and the reference respectively with the descending reference spectrum acquiring unit 1032 The method that spectrum acquiring unit 103 obtains the first spectrum in DWDM network systems is similar, and details are not described herein by the present invention.
The reference spectra acquiring unit 103 is additionally operable to the response spy according to the transmission link of the light signal to be checked Property and first spectrum determine reference spectra.
Specifically, in DWDM network systems, the reference spectra acquiring unit 103, specifically for according to one-way transmission The light signal to be checked transmission link response characteristic and first spectrum determine reference spectra.
That is, chain of the reference spectra acquiring unit 103 in the light signal to be checked for determining one-way transmission The response characteristic on road and after getting the first spectrum, by the response characteristic of the transmission link of the light signal to be checked of one-way transmission The waveform generated is multiplied with the waveform of the first spectrum, so as to obtain new waveform, as determines reference spectra.
In simple optical fiber in the network system with two-way transmission signals, the uplink reference spectra acquisition module 1031, it is additionally operable to the response characteristic of the transmission link of the light signal to be checked transmitted according to the uplink and first light Spectrum determines reference spectra.
That is, the uplink reference spectra acquiring unit 1031 is determining the light signal to be checked of uplink transmission Transmission link response characteristic and after getting the first spectrum, by the chain of the light signal to be checked of uplink transmission The waveform that the response characteristic on road is generated is multiplied with the waveform of the first spectrum, so as to obtain new waveform, as determines ginseng Examine spectrum.
The descending reference spectrum acquisition module 1032, is additionally operable to the light signal to be checked according to the downlink transmission Transmission link response characteristic and first spectrum determine reference spectra.
That is, the descending reference spectrum acquiring unit 1032 is determining the light signal to be checked of downlink transmission Transmission link response characteristic and after getting the first spectrum, by the chain of the light signal to be checked of downlink transmission The waveform that the response characteristic on road is generated is multiplied with the waveform of the first spectrum, so as to obtain new waveform, as determines ginseng Examine spectrum.
The spectroscopy unit 104, for according to the luminous power of the light signal to be checked spectrum and the reference spectra Determine optical signal to noise ratio of the light signal to be checked on first monitoring point.
Specifically, in DWDM network systems, the spectroscopy unit 104 is obtained according to the coherent reception unit 102 The reference spectra that the luminous power spectrum of the light signal to be checked of the one-way transmission taken and the reference spectra acquiring unit 103 determine is true Determine optical signal to noise ratio of the light signal to be checked of one-way transmission on the first monitoring point, specifically definite method comprises the following steps：
Step 1: the one-way transmission that the spectroscopy unit 104 is obtained in the coherent reception unit 102 is to be detected In the luminous power spectrum of optical signal, Selection Center wavelength is different and bandwidth is identical two wave bands are that Selection Center frequency is different And two wave bands that bandwidth is identical, first band and second band are denoted as respectively, and calculate the performance number P (BW of first band1) And the performance number P (BW of second band2)；It is chosen and first in the reference spectra determined in the reference spectra acquiring unit 103 The 3rd identical wave band of centre frequency and bandwidth of wave band and fourth ripple identical with the centre frequency of second band and bandwidth Section, and calculate the performance number R (BW of the 3rd wave band1) and the 4th wave band performance number R (BW2)。
Step 2: first band of the spectroscopy unit 104 according to the light signal to be checked of the one-way transmission of calculating Performance number P (BW1) with the performance number P (BW of second band2) difference and reference spectra the 3rd wave band performance number R (BW1) With the performance number R (BW of the 4th wave band2) difference be divided by, calculate the general power and reference light of the light signal to be checked of one-way transmission The ratio of the general power of spectrum, as：
The spectroscopy unit 104 is according to formulaCalculate the light to be detected of one-way transmission The ratio of the general power of signal and the general power of reference spectra.
It should be noted that in the general power and the general power of reference spectra for obtaining the light signal to be checked of one-way transmission During ratio, it is assumed that the noise flatness in the identical wave band of two bandwidth, i.e. noise power phase in the identical wave band of two bandwidth Together.
Step 3: the spectroscopy unit 104 is passed according to the general power of the light signal to be checked of one-way transmission with unidirectional The general power of defeated light signal to be checked is multiplied with the ratio of the general power of reference spectra, determines the light to be detected letter of one-way transmission Number actual signal general power；According to the general power and reference of the general power of reference spectra and the light signal to be checked of one-way transmission The ratio of the general power of spectrum is multiplied, and determines the actual noise general power of the light signal to be checked of one-way transmission.As：
The spectroscopy unit 104 is according to formula Se=KR obtains the signal of the light signal to be checked of the one-way transmission Performance number.
According to formula Ne=P-KR obtains the noise power-value of the light signal to be checked of the one-way transmission.
It should be noted that the general power P of the light signal to be checked of one-way transmission is the spectroscopy unit 104 to obtaining What the luminous power spectrum of the light signal to be checked for the one-way transmission got was integrated；The general power R of reference spectra is described Spectroscopy unit 104 integrates the reference spectra got.
Step 4: actual signal of the spectroscopy unit 104 according to the light signal to be checked of definite one-way transmission The ratio of the actual noise general power of the light signal to be checked of general power and one-way transmission determines the light to be detected letter of one-way transmission Number optical signal to noise ratio.As：
The spectroscopy unit 104 is according to formulaCalculate the light to be detected of the one-way transmission Optical signal to noise ratio of the signal on first monitoring point.
It should be noted that P (BW1) for one-way transmission light signal to be checked first band performance number；P(BW2) be The performance number of the second band of the light signal to be checked of one-way transmission；R(BW1) for reference spectra the 3rd wave band performance number；R (BW2) for reference spectra the 4th wave band performance number；K is the general power and reference spectra of the light signal to be checked of one-way transmission General power ratio；SeFor the actual signal power value of the light signal to be checked of one-way transmission；NeFor the to be detected of one-way transmission The actual noise performance number of optical signal；BW is channel width；BW0.1For 0.1nm equivalent bandwidths.
It should be noted that the spectroscopy unit 104 is composed according to the luminous power of the light signal to be checked of one-way transmission And the method that reference spectra determines the optical signal to noise ratio of the light signal to be checked of one-way transmission, it can also be other methods, the present invention This is not restricted.
It should be noted that determine at least one monitoring point on one-way transmission light signal to be checked optical signal to noise ratio When, there is the detection device on each monitoring point, the detection device on each monitoring point can only determine the monitoring The optical signal to noise ratio of the light signal to be checked of one-way transmission on point.
It should be noted that in simple optical fiber in the network system with two-way transmission signals, the spectrum analysis list Member 104 determines that the method for the optical signal to noise ratio of the light signal to be checked of uplink transmission and the spectroscopy unit 104 determine The method of the optical signal to noise ratio of the light signal to be checked of downlink transmission is with spectroscopy unit 104 described above in DWDM networks The method that the optical signal to noise ratio of the light signal to be checked of one-way transmission is determined in system is similar, and details are not described herein by the present invention.
An embodiment of the present invention provides a kind of device for detecting optical signal to noise ratio, described device includes：Signal acquiring unit, phase Dry receiving unit, reference spectra acquiring unit and spectroscopy unit, signal acquiring unit are used to obtain light signal to be checked, phase Dry receiving unit obtains the luminous power spectrum of light signal to be checked, ginseng for detecting light signal to be checked on the first monitoring point Spectrum acquiring unit is examined for obtaining the link model and the first spectrum of optical signal transmission to be detected, and root on the first monitoring point The response characteristic of the transmission link of light signal to be checked is determined according to the link model of acquisition, and then according to the biography of light signal to be checked The response characteristic of transmission link determines reference spectra with the first spectrum, so that spectroscopy unit is according to light signal to be checked Luminous power is composed and reference spectra determines optical signal to noise ratio of the light signal to be checked on the first monitoring point.In this way, spectroscopy unit When determining the optical signal to noise ratio of light signal to be checked, the reference spectra that uses is according to the link model of light signal to be checked and the What one spectrum determined, so as to reduce the error of the optical signal to noise ratio of light signal to be checked.
An embodiment of the present invention provides a kind of method for detecting optical signal to noise ratio, as shown in figure 5, including：
101st, detection device obtains light signal to be checked.
It should be noted that difference of the detection device according to network system, the light signal to be checked of acquisition is also different.
Specifically, in DWDM network systems, detection device obtains the light signal to be checked of one-way transmission.
Wherein, the light signal to be checked of the one-way transmission is the optical signal transmitted in fiber link.
In simple optical fiber in the network system with two-way transmission signals, such as in PON network system, detection device Obtain the light signal to be checked of uplink transmission and the light signal to be checked of downlink transmission.
Wherein, uplink refers to ONU (Optical Network Unit, optical network unit) to OLT (Optical Line Terminal, optical line terminal) send signal when link；Chain when downlink refers to from OLT to ONU transmission signals Road.
102nd, the detection device detects the light signal to be checked on the first monitoring point, and obtains the light to be detected The luminous power spectrum of signal.
Wherein, the first monitoring point is the signal of transmitting terminal transmitting at least through in the fiber link after a network node One point.
Further, the detection device emits local oscillator optical signal with first frequency interval, and the local oscillator light of transmitting is believed Number it is divided into mutually orthogonal the first local oscillator optical signal and the second local oscillator optical signal；The light signal to be checked of acquisition is divided into phase Mutually orthogonal the first optical signal and the second optical signal, and control the side of first optical signal and the first local oscillator optical signal To so that the direction of first optical signal is consistent with the direction of the first local oscillator optical signal, and controlling second light The direction of signal and the second local oscillator optical signal, so that the direction of second optical signal and the second local oscillator optical signal Direction it is identical；And be mixed first optical signal and the first local oscillator optical signal, the first mixed frequency signal is obtained, it will Second optical signal is mixed with the second local oscillator optical signal, obtains the second mixed frequency signal；And it is mixed to described first Signal and second mixed frequency signal are detected, and obtain the simulation of first mixed frequency signal and second mixed frequency signal Optical power signals, and the simulation optical power signals are converted into digital light power signal；Most the digital light power is believed at last Number carry out first processing, obtain the light signal to be checked luminous power spectrum.
Wherein, first mixed frequency signal includes at least two mutually orthogonal optical signals；The second mixed frequency signal bag Include at least two mutually orthogonal optical signals.First processing includes FFT transform, frequency spectrum splicing, and capability correction and coefficient are mended It repays.
Specifically, in DWDM network systems, detection device with certain step-size change carrier frequency, and with change after Carrier frequency emits local oscillator optical signal, and the local oscillator optical signal of transmitting is divided into mutually orthogonal the first local oscillator optical signal and second Local oscillator optical signal；And the light signal to be checked of the one-way transmission of acquisition is divided into the first mutually orthogonal optical signal and the second light letter Number, while control the direction of the first optical signal and the first local oscillator optical signal so that the direction of the first optical signal and the first local oscillator light The direction of signal is identical, the direction of control the second optical signal and the second local oscillator optical signal so that the direction of the second optical signal and the The direction of two local oscillator optical signals is identical；Then the first optical signal and the first local oscillator optical signal are mixed, obtain at least two Second optical signal and the second local oscillator optical signal are mixed, obtain at least two quadrature in phases by the optical signal of quadrature in phase Optical signal, and then the optical signal of all quadrature in phases of acquisition is detected, and determine the optical signal of all quadrature in phases Simulation optical power signals, then the simulation optical power signals of optical signal are converted, so as to obtain digital light power signal, most Obtained digital light power signal is subjected to FFT transform afterwards, frequency spectrum splices, and after capability correction and compensating coefficient processing, obtains The luminous power spectrum of the light signal to be checked of one-way transmission.
It should be noted that in simple optical fiber in the network system with two-way transmission signals, detection device is first The luminous power spectrum of the light signal to be checked of uplink and the luminous power of the light signal to be checked of downlink are obtained on monitoring point The method of spectrum obtains the light work(of the light signal to be checked of one-way transmission with detection device in dwdm system on the first monitoring point The method of rate spectrum is similar, and details are not described herein by the present invention.
103rd, the detection device obtains the link model of the optical signal transmission to be detected on first monitoring point, And the response characteristic of the transmission link of the light signal to be checked is determined according to the link model.
Wherein, the link model be the optical signal transmission to be detected when by all-network node set.
It should be noted that difference of the detection device according to the network system of application, obtains on the first monitoring point and treats It is different to detect the link model of optical signal transmission, it is specific as follows：
In DWDM network systems, detection device obtains the light to be detected of one-way transmission on first monitoring point The link model of signal transmission, and determine according to the link model transmission link of the light signal to be checked of the one-way transmission Response characteristic.
Specifically, in DWDM network systems, detection device obtains the light to be detected of one-way transmission on the first monitoring point During the link model of signal transmission, for the difference of the parameter configuration of DWDM network systems, acquisition methods are also different, specifically such as Under：
The network that the light signal to be checked that detection device obtains on first monitoring point according to network side passes through The model of node and pre-stored at least one network node determines the link model of the optical signal transmission to be detected.
That is, when the parameter configuration of DWDM network systems is dynamic configuration, transmitting terminal is in transmitting different wave length , it is necessary to which the mode that the optical signal of different wave length is respectively adopted to coding adds different optical labels before optical signal, and for one For the optical signal of a wavelength, this optical label is required to first be decoded by network side when passing through each network node, and It is recompiled, generates new optical label.
Therefore, network side in the decoding of each network node and recompiles information life according to the optical signal of a wavelength Launch each network node information passed through into the optical signal of a wavelength from transmitting terminal, and by the light of a wavelength Signal launches each network node information passed through from transmitting terminal and feeds back to detection device, i.e., treats one-way transmission Detection optical signal launches each network node information passed through from transmitting terminal and feeds back to detection device.At this point, detection Each network node letter that device is passed through on the first monitoring point according to the light signal to be checked of the one-way transmission received Breath determines each network node that the light signal to be checked of one-way transmission passed through and the number of each network node, from And according to the number of each network node and each network node pre-stored at least one network node model The model for each network node that the middle light signal to be checked for obtaining one-way transmission is passed through, and then according to each network section The model of point information and each network node of acquisition determines the link model of the optical signal transmission to be detected of one-way transmission, and According to the link model of the optical signal transmission to be detected of one-way transmission, determine the light signal to be checked of one-way transmission by each During a network node, the variation of signal spectrum generation, so as to pass through the signal of each network node according to light signal to be checked Spectrum change determines the response characteristic of the transmission link of the light signal to be checked of one-way transmission.
It should be noted that when the parameter configuration of DWDM network systems is dynamic configuration, detection device can also basis Other methods obtain the link model of the optical signal transmission to be detected of one-way transmission, and the present invention is without limitation.
Detection device obtains the link mould of the pre-stored optical signal transmission to be detected on first monitoring point Type.
That is, when the parameter configuration of DWDM network systems is fixed configurations, then the light to be detected of one-way transmission is believed Number network node passed through before the first monitoring point is fixed, so detection device can be in advance by the to be checked of one-way transmission The link model that light signal passes through before the first monitoring point is stored, so as to obtain the light to be detected letter of one-way transmission After the modulation format of number transmission, the link model of the optical signal transmission to be detected of pre-stored one-way transmission is directly acquired.
And the link model of the optical signal transmission to be detected according to one-way transmission, determine the light signal to be checked of one-way transmission When by each network node, the variation of signal spectrum generation, so as to pass through each network according to light signal to be checked The signal spectrum of node changes to determine the response characteristic of the transmission link of the light signal to be checked of one-way transmission.
Illustratively, it is assumed that the network node that the light signal to be checked of one-way transmission passes through before the first monitoring point has 3 It is a, it is respectively that the first ROADM (insert by Reconfigurable Optical Add-drop Multiplexer, restructural light point Multiplexer), the 2nd ROADM and optical signal amplifier, and the light signal to be checked of one-way transmission passes through before the first monitoring point Network node order for the first ROADM, optical signal amplifier and the 2nd ROADM, then detection device prestores unidirectional biography Defeated light signal to be checked passes through the chain of the first ROADM, optical signal amplifier and the 2nd ROADM successively before the first monitoring point Road model, thus after the modulation format of optical signal transmission to be detected of one-way transmission is obtained, directly by pre-stored list Pass through the first ROADM, optical signal amplifier and the 2nd ROADM successively before the first monitoring point to the light signal to be checked of transmission Link model be determined as the link model that the light signal to be checked of one-way transmission passes through before the first monitoring point.
And the link model of the optical signal transmission to be detected according to one-way transmission, determine the light signal to be checked of one-way transmission The variation that signal spectrum when passing through the first ROADM, optical signal amplifier and two ROADM occurs, so as to according to be detected The variation of signal spectrum when optical signal passes through the first ROADM, optical signal amplifier and two ROADM determines one-way transmission The response characteristic of the transmission link of light signal to be checked.
In PON network system, the detection device obtains the uplink transmission on first monitoring point The link model of optical signal transmission to be detected, and determine that the light to be detected that the uplink is transmitted is believed according to the link model Number transmission link response characteristic.
Specifically, detection device obtains the link model of the optical signal transmission to be detected of uplink transmission, and according to this Link model determines the method for the response characteristic of the transmission link of the light signal to be checked of uplink transmission and above-mentioned DWDM nets The link model of the optical signal transmission to be detected of one-way transmission is obtained in network system, and one-way transmission is determined according to this link model Light signal to be checked transmission link response characteristic method it is similar, the present invention details are not described herein.
Alternatively, the detection device obtains the light signal to be checked of the downlink transmission on first monitoring point The link model of transmission, and determine according to the link model transmission link of the light signal to be checked of the downlink transmission Response characteristic.
Specifically, detection device obtains the link model of the optical signal transmission to be detected of downlink transmission, and according to this Link model determines the method for the response characteristic of the transmission link of the light signal to be checked of downlink transmission and above-mentioned DWDM nets The link model of the optical signal transmission to be detected of one-way transmission is obtained in network system, and one-way transmission is determined according to this link model Light signal to be checked transmission link response characteristic method it is similar, the present invention details are not described herein.
104th, the detection device obtains the first spectrum.
Wherein, first spectrum is the signal spectrum without any node of transmitting terminal transmitting.
Specifically, in DWDM network systems, if the modulation format of the light signal to be checked of transmitting terminal transmitting only has one kind, Then detection device directly acquires the first spectrum.
If the modulation format of the light signal to be checked of transmitting terminal transmitting is at least one, detection device obtains the first spectrum Method have following several method.
First method, detection device obtain the modulation format of the light signal to be checked, and according to the modulation format Determine first spectrum.
Wherein, the transformat used when the modulation format is the optical signal transmission to be detected of the one-way transmission.
That is, detection device gathers the light signal to be checked of one-way transmission on the first monitoring point, and will collect One-way transmission light signal to be checked as the input signal of itself, inputted first by the neuroid in detection device Characteristic parameter is extracted in signal, for example, being extracted to the temporal signatures of signal, temporal signatures include the instantaneous width of signal The histogram or other statistical parameters of degree, instantaneous phase or instantaneous frequency, then according to the characteristic parameter sample structure extracted Into input vector, and using input vector as the input of neuroid, and then according to certain neural network function to network It is trained, works as train epochs, training error, when training time or training Grad reach default threshold value, training is automatic It terminates, and returns to the neutral net after training, and trained neutral net is matched, i.e., by trained neutral net Output compared with pre-stored sample, one and trained neutral net are found out using minimum mean-squared error criterion The most like sample of output, and modulation lattice of the light signal to be checked of the one-way transmission obtained using this sample as detection device Formula, so that it is determined that the light signal to be checked of one-way transmission is in the signal spectrum without any network node, as the first spectrum.
Second method, detection device determine whether the light signal to be checked carries pilot signal, described in determining When light signal to be checked carries the pilot signal, first spectrum is determined according to the pilot signal.
That is, detection device determines whether carried in the optical signal to be detected of one-way transmission on the first monitoring point There is pilot signal, when the light signal to be checked for determining one-way transmission carries pilot signal, then according to the frequency of pilot signal Determine the modulation format of the light signal to be checked of one-way transmission, so that it is determined that the light signal to be checked of one-way transmission without appoint The signal spectrum of one network node is the first spectrum.
It should be noted that transmitting terminal can emit the optical signal of different modulating form, and before optical signal is emitted, The pilot signal of different frequency is carried in the optical signal of different modulating form, in this way, detection device can be according to carrying The frequency of pilot signal determines the modulation format of the light signal to be checked of one-way transmission.
It should be noted that detection device can also obtain the light signal to be checked of one-way transmission according to other methods Modulation format, the present invention are without limitation.
It should be noted that in simple optical fiber in the network system with two-way transmission signals, detection device obtains the The method that the method for one spectrum obtains the first spectrum with detection device in DWDM network systems is similar, and the present invention is no longer superfluous herein It states.
105th, response characteristic and first light of the detection device according to the transmission link of the light signal to be checked Spectrum determines reference spectra.
Specifically, in DWDM network systems, detection device is according to the transmission of the light signal to be checked of one-way transmission The response characteristic of link and first spectrum determine reference spectra.
That is, detection device determine one-way transmission light signal to be checked transmission link response characteristic and obtain The waveform for being generated the response characteristic of the transmission link of the light signal to be checked of one-way transmission after getting the first spectrum and The waveform of one spectrum is multiplied, and so as to obtain new waveform, as determines reference spectra.
In simple optical fiber in the network system with two-way transmission signals, detection device is transmitted according to the uplink Light signal to be checked transmission link response characteristic and first spectrum determine reference spectra.
That is, response characteristic of the detection device in the transmission link for the light signal to be checked for determining uplink transmission And after getting the first spectrum, the response characteristic of the transmission link of the light signal to be checked of uplink transmission is generated Waveform is multiplied with the waveform of the first spectrum, so as to obtain new waveform, as determines reference spectra.
Alternatively, detection device according to the response characteristic of the transmission link of the light signal to be checked of the downlink transmission and First spectrum determines reference spectra.
That is, response characteristic of the detection device in the transmission link for the light signal to be checked for determining downlink transmission And after getting the first spectrum, the response characteristic of the transmission link of the light signal to be checked of downlink transmission is generated Waveform is multiplied with the waveform of the first spectrum, so as to obtain new waveform, as determines reference spectra.
It should be noted that step 102 is not successively suitable with the either step in step 103, step 104, step 105 Sequence, the invention is not limited in this regard.
106th, the detection device is according to composing the luminous power of the light signal to be checked and the reference spectra determines Optical signal to noise ratio of the light signal to be checked on first monitoring point.
Specifically, in DWDM network systems, detection device is according to the light of the light signal to be checked of the one-way transmission of acquisition Power spectrum and definite reference spectra determine optical signal to noise ratio of the light signal to be checked of one-way transmission on the first monitoring point, specifically The method of determining comprises the following steps：
Step 1: detection device the light signal to be checked of the one-way transmission of acquisition luminous power spectrum in, Selection Center ripple Long two different and identical bandwidth wave bands are two wave bands that Selection Center frequency is different and bandwidth is identical, are denoted as respectively First band and second band, and calculate the performance number P (BW of first band1) and second band performance number P (BW2)；It is determining Reference spectra in choose threeth wave band identical with the centre frequency and bandwidth of first band and with the center of second band frequently Rate and identical the 4th wave band of bandwidth, and calculate the performance number R (BW of the 3rd wave band1) and the 4th wave band performance number R (BW2)。
Step 2: performance number P of the detection device according to the first band of the light signal to be checked of the one-way transmission of calculating (BW1) with the performance number P (BW of second band2) difference and reference spectra the 3rd wave band performance number R (BW1) and the 4th ripple Performance number R (the BW of section2) difference be divided by, calculate the general power of light signal to be checked of one-way transmission and the total work of reference spectra The ratio of rate, as：
Detection device is according to formulaCalculate the total work of the light signal to be checked of one-way transmission The ratio of the general power of rate and reference spectra.
It should be noted that in the general power and the general power of reference spectra for obtaining the light signal to be checked of one-way transmission During ratio, it is assumed that the noise flatness in the identical wave band of two bandwidth, i.e. noise power phase in the identical wave band of two bandwidth Together.
Step 3: detection device is according to the general power of the light signal to be checked of one-way transmission and the light to be detected of one-way transmission The general power of signal is multiplied with the ratio of the general power of reference spectra, determines the actual signal of the light signal to be checked of one-way transmission General power；According to the general power of reference spectra and the general power of light signal to be checked of one-way transmission and the general power of reference spectra Ratio be multiplied, determine the actual noise general power of the light signal to be checked of one-way transmission.As：
Detection device is according to formula Se=KR obtains the signal power value of the light signal to be checked of the one-way transmission.
According to formula Ne=P-KR obtains the noise power-value of the light signal to be checked of the one-way transmission.
It should be noted that the general power P of the light signal to be checked of one-way transmission is that detection device is unidirectional to what is got What the luminous power spectrum of the light signal to be checked of transmission was integrated；The general power R of reference spectra is detection device to obtaining To reference spectra integrated.
Step 4: detection device is according to the actual signal general power of the light signal to be checked of definite one-way transmission and unidirectional The ratio of the actual noise general power of the light signal to be checked of transmission determines the optical signal to noise ratio of the light signal to be checked of one-way transmission. As：
Detection device is according to formulaThe light signal to be checked of the one-way transmission is calculated described Optical signal to noise ratio on one monitoring point.
It should be noted that P (BW1) for one-way transmission light signal to be checked first band performance number；P(BW2) be The performance number of the second band of the light signal to be checked of one-way transmission；R(BW1) for reference spectra the 3rd wave band performance number；R (BW2) for reference spectra the 4th wave band performance number；K is the general power and reference spectra of the light signal to be checked of one-way transmission General power ratio；SeFor the actual signal power value of the light signal to be checked of one-way transmission；NeFor the to be detected of one-way transmission The actual noise performance number of optical signal；BW is channel width；BW0.1For 0.1nm equivalent bandwidths.
It should be noted that detection device is composed according to the luminous power of the light signal to be checked of one-way transmission and reference spectra is true Determine the method for the optical signal to noise ratio of the light signal to be checked of one-way transmission, can also be other methods, the invention is not limited in this regard.
It should be noted that determine at least one monitoring point on one-way transmission light signal to be checked optical signal to noise ratio When, there is the detection device on each monitoring point, the detection device on each monitoring point can only determine the monitoring The optical signal to noise ratio of the light signal to be checked of one-way transmission on point.
It should be noted that in simple optical fiber in the network system with two-way transmission signals, detection device determines The light noise of the method for the optical signal to noise ratio of the light signal to be checked of uplink transmission and the light signal to be checked of downlink transmission The method that the method for ratio determines the optical signal to noise ratio of the light signal to be checked of one-way transmission with detection device in DWDM network systems Similar, details are not described herein by the present invention.
An embodiment of the present invention provides a kind of method for detecting optical signal to noise ratio, detection device is getting light signal to be checked Afterwards, the luminous power spectrum of light signal to be checked is obtained on the first monitoring point, and light letter to be detected is obtained on the first monitoring point The link model and the first spectrum of number transmission, so as to determine the transmission link of light signal to be checked according to the link model of acquisition Response characteristic, and then reference spectra is determined with the first spectrum according to the response characteristic of the transmission link of light signal to be checked, finally Determine the light signal to be checked in the described first prison according to the luminous power of the light signal to be checked spectrum and the reference spectra Optical signal to noise ratio on measuring point.In this way, the reference spectra that detection device is used when determining the optical signal to noise ratio of light signal to be checked is It is determined according to the link model of light signal to be checked and the first spectrum, so as to reduce the optical signal to noise ratio of light signal to be checked Error.
An embodiment of the present invention provides a kind of detection device, as shown in fig. 6, including：Processor (processor) 601 leads to Believe interface (Communications Interface) 602, memory (memory) 603, communication bus 604；Wherein, the place Reason device 601, the communication interface 602 and the memory 603 complete mutual communication by the communication bus 604.
Processor 601 can be a central processor CPU or specific integrated circuit ASIC (Application Specific Integrated Circuit) or be arranged to implement the embodiment of the present invention one or more integrate electricity Road.
For memory 603 for storing program code, said program code includes computer-managed instruction.Memory 603 can High-speed RAM memory can be included, it is also possible to further include nonvolatile memory (non-volatile memory), for example, at least One magnetic disk storage.Processor 601 is used to call the program code in memory 603.Specially：
The communication interface 602, for obtaining light signal to be checked.
It should be noted that difference of the communication interface 602 according to network system, the light signal to be checked of acquisition is not yet Together.
Specifically, in DWDM network systems, the communication interface 602 is treated specifically for obtaining described in one-way transmission Detect optical signal.
Wherein, the light signal to be checked of the one-way transmission is the optical signal transmitted in fiber link.
In simple optical fiber in the network system with two-way transmission signals, such as in PON network system, the communication connects Mouth 602, specifically for obtaining the light signal to be checked of uplink transmission and the light to be detected of downlink transmission Signal.
Wherein, link when uplink refers to ONU to OLT transmission signals；Downlink, which refers to that OLT is sent to ONU, to be believed Number when link.
The communication interface 602 is additionally operable to obtain the luminous power spectrum of the light signal to be checked on the first monitoring point.
Wherein, the first monitoring point is the signal of transmitting terminal transmitting at least through in the fiber link after a network node One point.
Further, the communication interface 602, specifically for emitting local oscillator optical signal with first frequency interval, and will hair The local oscillator optical signal penetrated is divided into mutually orthogonal the first local oscillator optical signal and the second local oscillator optical signal；By the described to be detected of acquisition Optical signal is divided into mutually orthogonal the first optical signal and the second optical signal, and controls first optical signal and first local oscillator The direction of optical signal so that the direction of first optical signal is consistent with the direction of the first local oscillator optical signal, and controls The direction of second optical signal and the second local oscillator optical signal, so that the direction of second optical signal and described second The direction of local oscillator optical signal is identical；First optical signal and the first local oscillator optical signal are mixed, it is mixed to obtain first Frequency signal, and second optical signal and the second local oscillator optical signal are mixed, obtain the second mixed frequency signal；And to institute It states the first mixed frequency signal and second mixed frequency signal is detected, and obtain first mixed frequency signal and second mixing The simulation optical power signals of signal, and the simulation optical power signals are converted into digital light power signal；And by the number Optical power signals carry out the first processing, obtain the luminous power spectrum of the light signal to be checked.
Wherein, first mixed frequency signal includes at least two mutually orthogonal optical signals；The second mixed frequency signal bag Include at least two mutually orthogonal optical signals.First processing includes FFT transform, and frequency spectrum splicing, capability correction and coefficient are mended It repays.
Specifically, in DWDM network systems, the communication interface 602 with certain step-size change carrier frequency, and with Carrier frequency transmitting local oscillator optical signal after change, and the local oscillator optical signal of transmitting is divided into the first mutually orthogonal local oscillator light and is believed Number and the second local oscillator optical signal；And by the light signal to be checked of the one-way transmission of acquisition be divided into the first mutually orthogonal optical signal and Second optical signal, while control the direction of the first optical signal and the first local oscillator optical signal so that the direction of the first optical signal and the The direction of one local oscillator optical signal is identical, controls the direction of the second optical signal and the second local oscillator optical signal so that the second optical signal Direction is identical with the direction of the second local oscillator optical signal；Then the first optical signal and the first local oscillator optical signal are mixed, obtained Second optical signal and the second local oscillator optical signal are mixed, obtain at least two phases by the optical signal of at least two quadrature in phases The orthogonal optical signal in position, and then the optical signal of all quadrature in phases of acquisition is detected, and determine all quadrature in phases Optical signal simulation optical power signals, then the simulation optical power signals of optical signal are converted, so as to obtain digital light work( Obtained digital light power signal is finally carried out FFT transform, frequency spectrum splicing, capability correction and compensating coefficient processing by rate signal Afterwards, the luminous power spectrum of the light signal to be checked of one-way transmission is obtained.
It should be noted that in simple optical fiber in the network system with two-way transmission signals, the communication interface 602 The light signal to be checked of the luminous power spectrum and downlink of the light signal to be checked of acquisition uplink on the first monitoring point The method of luminous power spectrum obtains the to be detected of one-way transmission in dwdm system with the communication interface 602 on the first monitoring point The method of the luminous power spectrum of optical signal is similar, and details are not described herein by the present invention.
The communication interface 602 is additionally operable to obtain the chain of the optical signal transmission to be detected on first monitoring point Road model.
Wherein, the link model be the optical signal transmission to be detected when by all-network node set.
The memory 603 is additionally operable to prestore the link model of the optical signal transmission to be detected.
Alternatively, the model of at least one network node passed through when prestoring the optical signal transmission to be detected.
It should be noted that the communication interface 602, according to the difference of the network system of application, in the first monitoring point The upper link model for obtaining optical signal transmission to be detected is different, specific as follows：
In DWDM network systems, the communication interface 602, for obtaining one-way transmission on first monitoring point The link model of the optical signal transmission to be detected.
Specifically, in DWDM network systems, the communication interface 602 obtains treating for one-way transmission on the first monitoring point When detecting the link model of optical signal transmission, for the difference of the parameter configuration of DWDM network systems, acquisition methods are also different, It is specific as follows：
The communication interface 602, it is described to be detected specifically for being obtained on first monitoring point according to network side The model at least one network node that the network node and the memory 603 that optical signal passes through store determines described treat Detect the link model of optical signal transmission.
That is, when the parameter configuration of DWDM network systems is dynamic configuration, transmitting terminal is in transmitting different wave length , it is necessary to which the mode that the optical signal of different wave length is respectively adopted to coding adds different optical labels before optical signal, and for one For the optical signal of a wavelength, this optical label is required to first be decoded by network side when passing through each network node, and It is recompiled, generates new optical label, therefore, network side is according to the optical signal of a wavelength in each network node The optical signal for decoding and recompiling information one wavelength of generation launches each network node passed through from transmitting terminal Information, and the optical signal of a wavelength is launched from transmitting terminal each network node information passed through feed back to it is described The light signal to be checked of one-way transmission is launched each network node passed through by communication interface 602 from transmitting terminal Information feeds back to the communication interface 602.At this point, the communication interface 602 is unidirectional according to receiving on the first monitoring point Each network node information that the light signal to be checked of transmission is passed through, determines that the light signal to be checked of one-way transmission is passed through Each network node and each network node number, so as to according to each network node and each network node Number the mould of each network node that the light signal to be checked of one-way transmission is passed through is obtained in the memory 603 Type, and then the to be detected of one-way transmission is determined according to the model of each network node information and each network node of acquisition The link model of optical signal transmission.
It should be noted that when the parameter configuration of DWDM network systems is dynamic configuration, the communication interface 602 may be used also To obtain the link model of the optical signal transmission to be detected of one-way transmission according to other methods, the present invention is without limitation.
Alternatively, the communication interface 602, specifically for being obtained on first monitoring point from the memory 603 The link model of the optical signal transmission to be detected.
That is, when the parameter configuration of DWDM network systems is fixed configurations, then the light to be detected of one-way transmission is believed Number network node passed through before the first monitoring point is fixed, so can in advance will be unidirectional in the communication interface 602 The link model that the light signal to be checked of transmission passes through before the first monitoring point is stored in the memory 603, thus After the modulation format for obtaining the optical signal transmission to be detected of one-way transmission, unidirectional pass is obtained directly from the memory 603 The link model of defeated optical signal transmission to be detected.
Illustratively, it is assumed that the network node that the light signal to be checked of one-way transmission passes through before the first monitoring point has 3 It is a, it is respectively the first ROADM, the 2nd ROADM and optical signal amplifier, and the light signal to be checked of one-way transmission is in the first monitoring The order for the network node that point passes through before is the first ROADM, optical signal amplifier and the 2nd ROADM, then in the memory The light signal to be checked that one-way transmission is prestored in 603 passes through the first ROADM, optical signal amplifying successively before the first monitoring point The link model of big device and the 2nd ROADM, thus after the modulation format of optical signal transmission to be detected of one-way transmission is obtained, The light signal to be checked that one-way transmission is obtained directly from the memory 603 passes through first successively before the first monitoring point The link model of ROADM, optical signal amplifier and the 2nd ROADM.
The processor 601, the link model for being obtained according to the communication interface 602 determine described to be detected The response characteristic of the transmission link of optical signal.
Specifically, the processor 601 is getting the light signal to be checked of one-way transmission in the communication interface 602 During link model, the light signal to be checked for determining one-way transmission according to the link model of the light signal to be checked of one-way transmission is passing through When crossing each network node, the variation of signal spectrum generation, so as to pass through each network node according to light signal to be checked Signal spectrum change determine one-way transmission light signal to be checked transmission link response characteristic.
In simple optical fiber in the network system with two-way transmission signals, the communication interface 602 is additionally operable to described The link model of the optical signal transmission to be detected of the uplink transmission is obtained on first monitoring point.
Specifically, the communication interface 602 obtains the link model of the optical signal transmission to be detected of uplink transmission Method obtains the link of the optical signal transmission to be detected of one-way transmission with communication interface 602 described above in DWDM network systems The method of model is similar, and details are not described herein by the present invention.
The communication interface 602 is additionally operable to obtain the to be detected of the downlink transmission on first monitoring point The link model of optical signal transmission.
Specifically, the communication interface 602 obtains the link model of the optical signal transmission to be detected of downlink transmission Method and the communication interface 602 described above obtain the optical signal transmission to be detected of one-way transmission in DWDM network systems The method of link model is similar, and details are not described herein by the present invention.
The processor 601 is additionally operable to determine the uplink according to the link model that the communication interface 602 obtains The response characteristic of the transmission link of the light signal to be checked of link transmission.
Specifically, the processor 601 is getting the light to be detected letter of uplink transmission in the communication interface 602 Number link model when, according to uplink transmit light signal to be checked link model determine uplink transmit it is to be checked Light signal is when by each network node, the variation of signal spectrum generation, to be checked so as to be transmitted according to uplink Light signal changes to determine the biography of the light signal to be checked of uplink transmission by the signal spectrum of each network node The response characteristic of transmission link.
The processor 601 is additionally operable to determine the downlink according to the link model that the communication interface 602 obtains The response characteristic of the transmission link of the light signal to be checked of link transmission.
Specifically, the processor 601 is believed in the communication interface 602 in the light to be detected for getting downlink transmission Number link model when, the to be checked of downlink transmission is determined according to the link model of the light signal to be checked of downlink transmission Light signal is when by each network node, the variation of signal spectrum generation, so as to according to the to be checked of downlink transmission Light signal changes to determine the biography of the light signal to be checked of downlink transmission by the signal spectrum of each network node The response characteristic of transmission link.
The communication interface 602 is additionally operable to obtain the first spectrum.
Wherein, first spectrum is the signal spectrum without any node of transmitting terminal transmitting.
Specifically, in DWDM network systems, if the modulation format of the light signal to be checked of transmitting terminal transmitting only has one kind, Then the communication interface 602 directly acquires the first spectrum.
If the modulation format of the light signal to be checked of transmitting terminal transmitting is at least one, the communication interface 602 obtains The method of first spectrum has following several method.
First method, the communication interface 602, specifically for obtaining the modulation format of the light signal to be checked, and First spectrum is determined according to the modulation format.
Wherein, the transformat used when the modulation format is the optical signal transmission to be detected of the one-way transmission.
That is, the communication interface 602 gathers the light signal to be checked of one-way transmission on the first monitoring point, and will The light signal to be checked of the one-way transmission collected is as the input signal of itself, by the neuron in the communication interface 602 Network extracts characteristic parameter in the input signal first, for example, being extracted to the temporal signatures of signal, temporal signatures include The histogram of the instantaneous amplitude of signal, instantaneous phase or instantaneous frequency or other statistical parameters, then according to the spy extracted It levies parameter sample and forms input vector, and using input vector as the input of neuroid, and then according to certain nerve net Network function pair network is trained, and works as train epochs, training error, and training time or training Grad reach default threshold value When, training is automatic to be terminated, and returns to the neutral net after training, and trained neutral net is matched, and will be trained The output of good neutral net is compared with pre-stored sample, and one and training are found out using minimum mean-squared error criterion The most like sample of the output of good neutral net, and the one-way transmission obtained using this sample as the communication interface 602 The modulation format of light signal to be checked, so that it is determined that the light signal to be checked of one-way transmission is in the letter without any network node Number spectrum is the first spectrum.
Second method, the communication interface 602, specifically for determining whether the light signal to be checked carries pilot tone When the definite light signal to be checked carries the pilot signal, described first is determined according to the pilot signal for signal Spectrum.
That is, the communication interface 602, on the first monitoring point in the optical signal to be detected of definite one-way transmission Whether pilot signal is carried, when the light signal to be checked for determining one-way transmission carries pilot signal, then believed according to pilot tone Number frequency determine one-way transmission light signal to be checked modulation format, so that it is determined that the light signal to be checked of one-way transmission exists It is the first spectrum without the signal spectrum of any network node.
It should be noted that transmitting terminal can emit the optical signal of different modulating form, and before optical signal is emitted, The pilot signal of different frequency is carried in the optical signal of different modulating form, in this way, the communication interface 602 can basis The frequency of the pilot signal of carrying determines the modulation format of the light signal to be checked of one-way transmission.
It should be noted that the communication interface 602 can also obtain the to be detected of one-way transmission according to other methods The modulation format of optical signal, the present invention are without limitation.
It should be noted that in simple optical fiber in the network system with two-way transmission signals, the communication interface 602 Obtain the first spectrum method obtained with the communication interface 602 in DWDM network systems the first spectrum method it is similar, this Details are not described herein for invention.
The processor 601 is additionally operable to according to the response characteristic of the transmission link of the light signal to be checked and described logical First spectrum that letter interface 602 obtains determines reference spectra.
Specifically, in DWDM network systems, the processor 601, specifically for according to the one-way transmission First spectrum that the response characteristic of the transmission link of light signal to be checked and the communication interface 602 obtain determines reference light Spectrum.
That is, response of the processor 601 in the transmission link for the light signal to be checked for getting one-way transmission When characteristic and the communication interface 602 get first spectrum, by the transmission link of the light signal to be checked of one-way transmission The waveform of the first spectrum that obtains of the waveform that is generated of response characteristic and the communication interface 602 be multiplied, so as to obtain New waveform as determines reference spectra.
In simple optical fiber in the network system with two-way transmission signals, the processor 601 is additionally operable to according to The response characteristic of the transmission link of the light signal to be checked of uplink transmission and described the first of the acquisition of the communication interface 602 Spectrum determines reference spectra.
That is, sound of the processor 601 in the transmission link for the light signal to be checked for determining uplink transmission When answering characteristic and the communication interface 602 to get the first spectrum, by the chain of the light signal to be checked of uplink transmission The waveform that the response characteristic on road is generated is multiplied with the waveform for the first spectrum that the communication interface 602 obtains, so as to To new waveform, reference spectra is as determined.
The processor 601 is additionally operable to the sound of the transmission link of light signal to be checked according to the downlink transmission First spectrum that characteristic and the communication interface 602 obtain is answered to determine reference spectra.
That is, sound of the processor 601 in the transmission link for the light signal to be checked for determining downlink transmission When answering characteristic and the communication interface 602 to get the first spectrum, by the chain of the light signal to be checked of downlink transmission The waveform that the response characteristic on road is generated is multiplied with the waveform for the first spectrum that the communication interface 602 obtains, so as to To new waveform, reference spectra is as determined.
The processor 601 is additionally operable to treat according to obtaining the reference spectra and the communication interface modules 602 The luminous power spectrum for detecting optical signal determines optical signal to noise ratio of the light signal to be checked on first monitoring point.
Specifically, in DWDM network systems, the processor 601 is according to definite reference spectra and the communication interface The luminous power spectrum of the light signal to be checked of 602 one-way transmissions obtained determines the light signal to be checked of one-way transmission in the first monitoring Optical signal to noise ratio on point specifically determines that method comprises the following steps：
Step 1: the light of the light signal to be checked for the one-way transmission that the processor 601 is obtained in the communication interface 602 In power spectrum, Selection Center wavelength is different and bandwidth is identical two wave bands are that Selection Center frequency is different and bandwidth is identical Two wave bands, be denoted as first band and second band respectively, and calculate the performance number P (BW of first band1) and second band Performance number P (BW2)；Threeth ripple identical with the centre frequency and bandwidth of first band is chosen in definite reference spectra Section and fourth wave band identical with the centre frequency of second band and bandwidth, and calculate the performance number R (BW of the 3rd wave band1) and Performance number R (the BW of 4th wave band2)。
Step 2: power of the processor 601 according to the first band of the light signal to be checked of the one-way transmission of calculating Value P (BW1) with the performance number P (BW of second band2) difference and reference spectra the 3rd wave band performance number R (BW1) and the 4th Performance number R (the BW of wave band2) difference be divided by, calculate the light signal to be checked of one-way transmission general power and reference spectra it is total The ratio of power, as：
The processor 601 is according to formulaCalculate the light signal to be checked of one-way transmission The ratio of the general power of general power and reference spectra.
It should be noted that in the general power and the general power of reference spectra for obtaining the light signal to be checked of one-way transmission During ratio, it is assumed that the noise flatness in the identical wave band of two bandwidth, i.e. noise power phase in the identical wave band of two bandwidth Together.
Step 3: the processor 601 is according to the general power of light signal to be checked of one-way transmission and treating for one-way transmission The general power of detection optical signal is multiplied with the ratio of the general power of reference spectra, determines the reality of the light signal to be checked of one-way transmission Border total power signal；According to the general power and reference spectra of the general power of reference spectra and the light signal to be checked of one-way transmission The ratio of general power is multiplied, and determines the actual noise general power of the light signal to be checked of one-way transmission.As：
The processor 601 is according to formula Se=KR obtains the signal power of the light signal to be checked of the one-way transmission Value.
According to formula Ne=P-KR obtains the noise power-value of the light signal to be checked of the one-way transmission.
It should be noted that the general power P of the light signal to be checked of one-way transmission is the processor 601 to getting What the luminous power spectrum of the light signal to be checked of one-way transmission was integrated；The general power R of reference spectra is the processor What 601 pairs of reference spectras got were integrated.
Step 4: actual signal general power of the processor 601 according to the light signal to be checked of definite one-way transmission And the ratio of the actual noise general power of the light signal to be checked of one-way transmission determines the light of the light signal to be checked of one-way transmission Signal-to-noise ratio.As：
The processor 601 is according to formulaThe light signal to be checked for calculating the one-way transmission exists Optical signal to noise ratio on first monitoring point.
It should be noted that P (BW1) for one-way transmission light signal to be checked first band performance number；P(BW2) be The performance number of the second band of the light signal to be checked of one-way transmission；R(BW1) for reference spectra the 3rd wave band performance number；R (BW2) for reference spectra the 4th wave band performance number；K is the general power and reference spectra of the light signal to be checked of one-way transmission General power ratio；SeFor the actual signal power value of the light signal to be checked of one-way transmission；NeFor the to be detected of one-way transmission The actual noise performance number of optical signal；BW is channel width；BW0.1For 0.1nm equivalent bandwidths.
It should be noted that the processor 601 is composed and referred to according to the luminous power of the light signal to be checked of one-way transmission The method that spectrum determines the optical signal to noise ratio of the light signal to be checked of one-way transmission, can also be other methods, the present invention to this not It is restricted.
It should be noted that determine at least one monitoring point on one-way transmission light signal to be checked optical signal to noise ratio When, there is the detection device on each monitoring point, the detection device on each monitoring point can only determine the monitoring The optical signal to noise ratio of the light signal to be checked of one-way transmission on point.
It should be noted that in simple optical fiber in the network system with two-way transmission signals, the processor 601 is true Determine the light of the method for the optical signal to noise ratio of the light signal to be checked of uplink transmission and the light signal to be checked of downlink transmission The method of signal-to-noise ratio determines the light noise of the light signal to be checked of one-way transmission with the processor 601 in DWDM network systems The method of ratio is similar, and details are not described herein by the present invention.
An embodiment of the present invention provides a kind of device for detecting optical signal to noise ratio, detection device is getting light signal to be checked Afterwards, the luminous power spectrum of light signal to be checked is obtained on the first monitoring point, and light letter to be detected is obtained on the first monitoring point The link model and the first spectrum of number transmission, so as to determine the transmission link of light signal to be checked according to the link model of acquisition Response characteristic, and then reference spectra is determined with the first spectrum according to the response characteristic of the transmission link of light signal to be checked, finally Determine the light signal to be checked in the described first prison according to the luminous power of the light signal to be checked spectrum and the reference spectra Optical signal to noise ratio on measuring point.In this way, the reference spectra that detection device is used when determining the optical signal to noise ratio of light signal to be checked is It is determined according to the link model of light signal to be checked and the first spectrum, so as to reduce the optical signal to noise ratio of light signal to be checked Error.
In several embodiments provided herein, it should be understood that disclosed system, apparatus and method can be with It realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the unit Division is only a kind of division of logic function, can there is other dividing mode, such as multiple units or component in actual implementation It may be combined or can be integrated into another system or some features can be ignored or does not perform.It is another, it is shown or The mutual coupling, direct-coupling or communication connection discussed can be the indirect coupling by some interfaces, device or unit It closes or communicates to connect, can be electrical, machinery or other forms.
The unit illustrated as separating component may or may not be physically separate, be shown as unit The component shown may or may not be physical location, you can be located at a place or can also be distributed to multiple In network element.Some or all of unit therein can be selected to realize the mesh of this embodiment scheme according to the actual needs 's.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it can also That the independent physics of unit includes, can also two or more units integrate in a unit.Above-mentioned integrated list The form that hardware had both may be employed in member is realized, can also be realized in the form of hardware adds SFU software functional unit.
The above-mentioned integrated unit realized in the form of SFU software functional unit, can be stored in one and computer-readable deposit In storage media.Above-mentioned SFU software functional unit is stored in a storage medium, is used including some instructions so that a computer Equipment (can be personal computer, server or the network equipment etc.) performs the portion of each embodiment the method for the present invention Step by step.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only memory (Read-Only Memory, abbreviation ROM), random access memory (Random Access Memory, abbreviation RAM), magnetic disc or CD etc. are various to store The medium of program code.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that：It still may be used To modify to the technical solution recorded in foregoing embodiments or carry out equivalent substitution to which part technical characteristic； And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical solution spirit and Scope.

Claims (13)

1. a kind of detection device, which is characterized in that including：Signal acquiring unit, coherent reception unit, reference spectra acquiring unit And spectroscopy unit；Wherein,
The signal acquiring unit, for obtaining light signal to be checked；
The coherent reception unit for detecting the light signal to be checked on the first monitoring point, and obtains described to be detected The luminous power spectrum of optical signal；
The reference spectra acquiring unit, for obtaining the link of the optical signal transmission to be detected on first monitoring point Model, and determine according to the link model response characteristic of the transmission link of the light signal to be checked；
The reference spectra acquiring unit is additionally operable to obtain the first spectrum；Wherein, first spectrum emits not for transmitting terminal By the signal spectrum of any network node；
The reference spectra acquiring unit is additionally operable to according to the response characteristic of the transmission link of the light signal to be checked and described First spectrum determines reference spectra；
The spectroscopy unit, described in being determined according to the luminous power of the light signal to be checked spectrum and the reference spectra Optical signal to noise ratio of the light signal to be checked on first monitoring point.
2. the apparatus according to claim 1, which is characterized in that the reference spectra acquiring unit is additionally operable to acquisition first Spectrum includes：
The reference spectra acquiring unit, specifically for obtaining the modulation format of the light signal to be checked, and according to the tune Form processed determines first spectrum；Alternatively,
The reference spectra acquiring unit, specifically for determining whether the light signal to be checked carries pilot signal, true When the fixed light signal to be checked carries the pilot signal, first spectrum is determined according to the pilot signal.
3. device according to claim 1 or 2, which is characterized in that described device further includes：Storage unit；
The storage unit, for prestoring the link model of the optical signal transmission to be detected or prestoring described The model of at least one network node passed through during optical signal transmission to be detected；
The reference spectra acquiring unit, for obtaining the link of the optical signal transmission to be detected on first monitoring point Model includes：
The reference spectra acquiring unit, specifically for being treated on first monitoring point from the storage unit described in acquisition Detect the link model of optical signal transmission；Alternatively,
The reference spectra acquiring unit, it is described to be detected specifically for being obtained on first monitoring point according to network side The model of at least one network node stored in the network node of optical signal process and the storage unit determines described The link model of optical signal transmission to be detected.
4. the apparatus according to claim 1, which is characterized in that the coherent reception unit includes：Polarization Control Module, this Shake laser module, the first polarization beam splitting module, the second polarization beam splitting module, the first photomixing module, the second photomixing module, light Electric detecting module, analog-to-digital conversion module and digital signal processing module；
The coherent reception unit includes for obtaining the luminous power of the light signal to be checked spectrum：
The local oscillator laser module, for emitting local oscillator optical signal with first frequency interval；
The first polarization beam splitting module, for the light signal to be checked to be divided into mutually orthogonal the first optical signal and second Optical signal, and first optical signal and second optical signal are separately input into the first photomixing module and described Two photomixing modules；
The second polarization beam splitting module, for the local oscillator optical signal to be divided into the first mutually orthogonal local oscillator optical signal and Two local oscillator optical signals, and the first local oscillator optical signal and the second local oscillator optical signal are separately input into first light and mixed Frequency module and the second photomixing module；
The Polarization Control Module, for controlling first optical signal and the first local oscillator optical signal, so that described The direction of one optical signal and the first local oscillator optical signal is consistent, and second optical signal and the second local oscillator light is controlled to believe Number, so that the direction of second optical signal and the second local oscillator optical signal is consistent；
The first photomixing module for first optical signal and the first local oscillator optical signal to be mixed, obtains First mixed frequency signal, and first mixed frequency signal is inputted to the photoelectric detection module；Wherein, first mixed frequency signal Including at least two mutually orthogonal optical signals；
The second photomixing module for second optical signal and the second local oscillator optical signal to be mixed, obtains Second mixed frequency signal, and second mixed frequency signal is inputted to the photoelectric detection module；Wherein, second mixed frequency signal Including at least two mutually orthogonal optical signals；
The photoelectric detection module for being detected to first mixed frequency signal and second mixed frequency signal, and obtains The simulation optical power signals of first mixed frequency signal and second mixed frequency signal, and the simulation optical power signals are inputted To the analog-to-digital conversion module；
The analog-to-digital conversion module, for the simulation optical power signals to be converted to digital light power signal, and by the number Word optical power signals are inputted to the digital signal processing module；
The digital signal processing module for the digital light power signal to be carried out the first processing, obtains described to be detected The luminous power spectrum of optical signal；Wherein, first processing includes Fast Fourier Transform (FFT) FFT, and frequency spectrum splices, capability correction and is Number compensation.
5. the apparatus according to claim 1, which is characterized in that the signal acquiring unit, for obtaining light letter to be detected Number include：
The signal acquiring unit, specifically for obtaining the light signal to be checked of one-way transmission；Alternatively,
The signal acquiring unit, specifically for obtaining the light signal to be checked and downlink transmission of uplink transmission The light signal to be checked.
6. device according to claim 5, which is characterized in that the reference spectra acquiring unit includes：Uplink reference light Compose acquisition module and descending reference spectrum acquisition module；
The uplink reference spectra acquisition module, for obtaining the to be checked of the uplink transmission on first monitoring point The link model of light signal transmission, and the light signal to be checked that the uplink transmits is determined according to the link model The response characteristic of transmission link；
The uplink reference spectra acquisition module is additionally operable to the chain of the light signal to be checked transmitted according to the uplink The response characteristic on road and first spectrum determine reference spectra；
The descending reference spectrum acquisition module, for obtaining the to be checked of the downlink transmission on first monitoring point The link model of light signal transmission, and determine according to the link model light signal to be checked of the downlink transmission The response characteristic of transmission link；
The descending reference spectrum acquisition module is additionally operable to the chain of the light signal to be checked according to the downlink transmission The response characteristic on road and first spectrum determine reference spectra.
A kind of 7. method for detecting optical signal to noise ratio, which is characterized in that including：
Detection device obtains light signal to be checked；
The detection device obtains the luminous power spectrum of the light signal to be checked on the first monitoring point；
The detection device obtains the link model of the optical signal transmission to be detected on first monitoring point, and according to institute State the response characteristic that link model determines the transmission link of the light signal to be checked；
The detection device obtains the first spectrum；Wherein, first spectrum is transmitting terminal transmitting without any device Signal spectrum；
The detection device determines to join according to the response characteristic and first spectrum of the transmission link of the light signal to be checked Examine spectrum；
The detection device is composed according to the luminous power of the light signal to be checked and the reference spectra determines the light to be detected Optical signal to noise ratio of the signal on first monitoring point.
8. include the method according to the description of claim 7 is characterized in that the detection device obtains the first spectrum：
The detection device obtains the modulation format of the light signal to be checked, and determines described first according to the modulation format Spectrum；Alternatively,
The detection device determines whether the light signal to be checked carries pilot signal, in the definite light signal to be checked When carrying the pilot signal, first spectrum is determined according to the pilot signal.
9. the method according to claim 7 or 8, which is characterized in that the detection device obtains on first monitoring point Taking the link model of the optical signal transmission to be detected includes：
The detection device obtains the link model of pre-stored optical signal transmission to be detected on first monitoring point；Or Person,
The network that the light signal to be checked that the detection device obtains on first monitoring point according to network side passes through The model of node and pre-stored at least one network node determines the link model of the optical signal transmission to be detected.
10. the method according to the description of claim 7 is characterized in that described in the detection device obtains on the first monitoring point The luminous power spectrum of light signal to be checked includes：
The detection device emits local oscillator optical signal with first frequency interval, and the local oscillator optical signal of transmitting is divided into mutually orthogonal The first local oscillator optical signal and the second local oscillator optical signal；
The light signal to be checked of acquisition is divided into mutually orthogonal the first optical signal and the second optical signal by the detection device, And the direction of first optical signal and the first local oscillator optical signal is controlled, so that the direction of first optical signal and institute It states that the direction of the first local oscillator optical signal is consistent, and controls the direction of second optical signal and the second local oscillator optical signal, with So that the direction of second optical signal is identical with the direction of the second local oscillator optical signal；
First optical signal and the first local oscillator optical signal are mixed by the detection device, obtain the first mixing letter Number, and second optical signal and the second local oscillator optical signal are mixed, obtain the second mixed frequency signal；Wherein, it is described First mixed frequency signal includes at least two mutually orthogonal optical signals；It is mutually orthogonal that second mixed frequency signal includes at least two Optical signal；
The detection device is detected first mixed frequency signal and second mixed frequency signal, and it is mixed to obtain described first The simulation optical power signals of frequency signal and second mixed frequency signal, and the simulation optical power signals are converted into digital light work( Rate signal；
The digital light power signal is carried out the first processing by the detection device, obtains the luminous power of the light signal to be checked Spectrum；Wherein, first processing includes Fast Fourier Transform (FFT) FFT, frequency spectrum splicing, capability correction and compensating coefficient.
11. include the method according to the description of claim 7 is characterized in that the detection device obtains light signal to be checked：
The detection device obtains the light signal to be checked of one-way transmission；Alternatively,
The detection device obtain uplink transmission the light signal to be checked and downlink transmission it is described to be detected Optical signal.
12. according to the method for claim 11, which is characterized in that the detection device obtains on first monitoring point The link model of the optical signal transmission to be detected, and determine according to the link model chain of the light signal to be checked The response characteristic on road includes：
The detection device obtains the chain of the optical signal transmission to be detected of the uplink transmission on first monitoring point Road model, and determine that according to the link model response of the transmission link for the light signal to be checked that the uplink transmits is special Property；Alternatively,
The detection device obtains the chain of the optical signal transmission to be detected of the downlink transmission on first monitoring point Road model, and determine that according to the link model response of the transmission link of the light signal to be checked of the downlink transmission is special Property；
The detection device determines to join according to the response characteristic and first spectrum of the transmission link of the light signal to be checked Examining spectrum includes：
The luminous power spectrum for the light signal to be checked that the detection device is transmitted according to the uplink and the reference spectra are true Optical signal to noise ratio of the light signal to be checked of the fixed uplink transmission on first monitoring point；Alternatively,
The detection device is composed according to the luminous power of the light signal to be checked of the downlink transmission and the reference spectra is true Optical signal to noise ratio of the light signal to be checked of the fixed downlink transmission on first monitoring point.
13. a kind of detection device, which is characterized in that including：
Communication interface, for obtaining light signal to be checked；
The communication interface is additionally operable to obtain the luminous power spectrum of the light signal to be checked on the first monitoring point；
The communication interface is additionally operable to obtain the link model of the optical signal transmission to be detected on first monitoring point；
Processor, the link model for being obtained according to the communication interface determine the chain of the light signal to be checked The response characteristic on road；
The communication interface is additionally operable to obtain the first spectrum；Wherein, first spectrum is transmitting terminal transmitting without any The signal spectrum of network node；
The processor is additionally operable to the biography of first spectrum and the light signal to be checked according to communication interface acquisition The response characteristic of transmission link determines reference spectra；
The processor is additionally operable to the light of the light signal to be checked according to the reference spectra and communication interface acquisition Power spectrum determines optical signal to noise ratio of the light signal to be checked on first monitoring point.
CN201480070041.6A 2014-03-13 2014-03-13 A kind of method and device for detecting optical signal to noise ratio Active CN105874727B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2014/073356 WO2015135173A1 (en) 2014-03-13 2014-03-13 Method and device for detecting optical signal-to-noise ratio

Publications (2)

Publication Number Publication Date
CN105874727A CN105874727A (en) 2016-08-17
CN105874727B true CN105874727B (en) 2018-06-05

Family

ID=54070805

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201480070041.6A Active CN105874727B (en) 2014-03-13 2014-03-13 A kind of method and device for detecting optical signal to noise ratio

Country Status (2)

Country Link
CN (1) CN105874727B (en)
WO (1) WO2015135173A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107749779B (en) * 2017-09-29 2019-07-19 北京邮电大学 A kind of pulse amplitude modulation PAM-N signal light performance monitoring method and device
CN108957125A (en) * 2018-03-20 2018-12-07 北京邮电大学 Smart frequency spectrum figure analysis method based on machine learning
CN108599839B (en) * 2018-06-22 2023-06-23 南京星熠科技有限公司 Method and system for extracting detection light wave signals in optical fiber communication
CN112242871B (en) * 2019-07-19 2023-03-28 上海诺基亚贝尔股份有限公司 Method, apparatus and computer-readable storage medium for optical communication

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2136485A1 (en) * 2008-06-19 2009-12-23 Acterna, LLC Determining in-band optical signal-to-noise ratios in optical signals with time-varying polarization states using polarization extinction
CN102714544A (en) * 2010-02-15 2012-10-03 爱斯福公司 Reference-based in-band OSNR measurement on polarization-multiplexed signals
CN102742185A (en) * 2012-03-23 2012-10-17 华为技术有限公司 Method for detecting optical signal noise ratio, device, node device and network system
CN102904635A (en) * 2012-10-25 2013-01-30 中兴通讯股份有限公司 Optical signal to noise ratio (OSNR) detecting method, system and equipment

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2924891A4 (en) * 2012-12-07 2015-11-11 Huawei Tech Co Ltd Automatic power testing method and first roadm station

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2136485A1 (en) * 2008-06-19 2009-12-23 Acterna, LLC Determining in-band optical signal-to-noise ratios in optical signals with time-varying polarization states using polarization extinction
CN102714544A (en) * 2010-02-15 2012-10-03 爱斯福公司 Reference-based in-band OSNR measurement on polarization-multiplexed signals
CN102742185A (en) * 2012-03-23 2012-10-17 华为技术有限公司 Method for detecting optical signal noise ratio, device, node device and network system
CN102904635A (en) * 2012-10-25 2013-01-30 中兴通讯股份有限公司 Optical signal to noise ratio (OSNR) detecting method, system and equipment

Also Published As

Publication number Publication date
CN105874727A (en) 2016-08-17
WO2015135173A1 (en) 2015-09-17

Similar Documents

Publication Publication Date Title
CN105874727B (en) A kind of method and device for detecting optical signal to noise ratio
US7715710B2 (en) Method and system for power management in optical networks
CN104509010B (en) The method and apparatus established for channel in optical WDM network
EP2174113B1 (en) System and method using differential loop gain for fault identification in line monitoring equipment
EP3404851B1 (en) Optical connecting system for connecting a first and a second optical device
WO2011140912A1 (en) System and method for detecting branch fiber, optical distribution network and optical splitter
CN106134103B (en) The method and network node of balanced optical transmission signal
US10951344B2 (en) Optical transmitter, optical receiver, and optical transmission system
JP6311443B2 (en) Measuring apparatus, measuring method and transmission system
CN107743050A (en) The system that the transmitting-receiving of high-speed optical signal full duplex is realized using quadravalence pulse-amplitude modulation and demodulation techniques
US9236950B2 (en) Method and device for determining a presence of a locking signal in a signal received by an optical receiver device
Zhou et al. Simultaneous baud rate/modulation format identification and multi-parameter optical performance monitoring using multi-task learning with enhanced picture of Radon transform
CN109196796A (en) Optic communication
CN206341220U (en) Terahertz digital communication system based on polarization coding
CN105187111B (en) Signal acquiring method, device based on visible light communication and visible light communication system
Nadal et al. Transparent service delivery in elastic metro/access networks with cost-effective programmable transceivers
CN102611520B (en) A kind of wavelength tag information analysis apparatus and analysis method
Trinh et al. Free-space optical systems over correlated atmospheric fading channels: Spatial diversity or multihop relaying?
Kruse et al. Generalizable QoT estimation based on spectral data driven LSTM in exact component parameter agnostic networks
KR102259886B1 (en) Apparatus and method for tuning optical transceiver wavelength
CN105981312B (en) A kind of passive optical network equipment
US20240196118A1 (en) Connection node apparatus, optical transmission system, and connection method
Bajaj et al. Application of soft computing technique for optical add/drop multiplexer in terms of OSNR and optical noise power
Lin et al. To overcome the scalability limitation of passive optical interconnects in datacentres
Arora et al. High speed, long reach OCDMA-FSO transmission link employing FBG encoder under various atmospheric condition and power levers

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant