CN104601223A - Optical signal-to-noise ratio (OSNR) monitoring device and method for WDM (wavelength division multiplexing) system - Google Patents
Optical signal-to-noise ratio (OSNR) monitoring device and method for WDM (wavelength division multiplexing) system Download PDFInfo
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Abstract
The invention relates to the field of communication, discloses optical signal-to-noise ratio (OSNR) monitoring device and method for a WDM (wavelength division multiplexing) system, and aims at solving the technical problem of relatively high requirement on detecting devices during OSNR detecting in the prior art. The device comprises optical fibers, a first fiber bragg grating, a second fiber bragg grating, a thermal printer head, a thermal printer head driver, a processing device, a photoelectric converter and a three-port optical circulator; the processing device generates a first control instruction to control the thermal printer head to heat the first position of the first fiber bragg grating, then the photoelectric converter acquires to obtain an optical signal of a filter transmission band at the first position and converts the optical signal into a first electric signal to be transmitted to the processing device; the processing device determines the first OSNR of the WDM system according to the first electric signal. With the adoption of the device and method, the technical effect of reducing the requirement for the detecting device during OSNR measuring can be achieved.
Description
Technical field
The present invention relates to the communications field, particularly relate to the optical signal-to-noise ratio monitoring device and method in a kind of wave division multiplexing WDM system.
Background technology
Along with the implementation of WDM (Wavelength Division Multiplexing: wavelength division multiplexing) system, as one of its crucial measurement index, OSNR (Optical Signal To Noise Ratio: Optical Signal Noise Ratio) directly can react the quality of light signal, that assessment channel quality is good and bad, a key parameter of system works performance and signal transmission quality quality.Its definition is that the signal power of passage is divided by the noise power in wavelength place 0.1nm.
The method that traditional band detects OSNR is outward by being with outer ASE noise, and obtains OSNR with the ratio of inband signaling.Along with wavelength-division multiplex system wavelength interval constantly promotes, wavelength speed constantly promotes, the continuous upgrading of modulation format, being on the increase of the optical filter in optical communication link system, causes the outer OSNR method of measurement of traditional band to become no longer accurate.Therefore, the technology of OSNR monitoring in band is become more and more crucial.
The existing general method of measurement to the interior OSNR of band generally adopts the mode based on DSP (Digital Signal Processing: digital signal processing), higher requirement is had for transmitting and receiving system, as adopted complicated training sequence at transmitting terminal, in the method for receiving terminal coherent demodulation, need to adopt DA at a high speed to change (digital-to-analogue conversion) chip and AD (analog-to-digital conversion) sampling A/D chip, monitor as real-time OSNR will be realized, need processor support at a high speed; Or adopt the OSNR detection technique of polarization extinction, being separated of signal and noise is realized by signal polarization, the unpolarized characteristic of noise, this method needs complicated Instrumentation and Control device, as high speed Polarization Controller, high speed polarization analysis instrument, spectrum analyzer etc. and being difficult to use in polarisation multiplex system.
Summary of the invention
The invention provides the optical signal-to-noise ratio monitoring device and method in a kind of wave division multiplexing WDM system, to solve in prior art when measuring OSNR, the technical problem higher to the requirement of checkout equipment.
First aspect, the embodiment of the present invention provides the optical signal-to-noise ratio monitoring device in a kind of wave division multiplexing WDM system, comprising:
Optical fiber;
First fiber grating, inscribes in described optical fiber;
Second fiber grating, inscribes in described optical fiber;
Thermal printer head, for heating described first fiber grating;
Thermal printer head driver, is connected to described thermal printer head, for being controlled described thermal printer head by control command;
Treatment facility, is connected to described thermal printer head driver, for producing described control command to described thermal printer head driver;
Optical-electrical converter;
Three ports light rings, the Single port of described three ports light rings is connected to described first fiber grating, the Two-port netwerk of described three ports light rings is connected to described second fiber grating, and three ports of described three port photocirculators are connected to described optical-electrical converter;
Wherein, the first control command produced at described treatment facility controls described thermal printer head to after the primary importance heating of described first fiber grating, obtained the light signal of the filter pass band of described primary importance by described optical-electrical converter collection, and described light signal is converted to the first electric signal transmission to described treatment facility; Described treatment facility determines the first Optical Signal To Noise Ratio value of described wdm system according to described first signal of telecommunication.
Optionally, described device also comprises:
Heat sink, described heat sink, described first fiber grating and described thermal printer head are affixed.
Optionally, described treatment facility, specifically for: determine the matched curve corresponding to described primary importance, in described matched curve, comprise the corresponding relation of the signal of telecommunication and Optical Signal To Noise Ratio; And in matched curve according to described first signal of telecommunication, search the described first Optical Signal To Noise Ratio value of acquisition.
Optionally, described treatment facility, also for:
Control described thermal printer head to heat described primary importance; Adjust the size of the Optical Signal To Noise Ratio at the filter pass band place of described primary importance, and then detect the acquisition multiple signals of telecommunication corresponding from multiple different Optical Signal To Noise Ratio; Corresponding relation based on described multiple different Optical Signal To Noise Ratio and described multiple signal of telecommunication generates described matched curve.
Optionally, described treatment facility, also for: by controlling described thermal printer head, described first fiber grating is heated, and then insert phase shift in the transmission spectrum stopband of described first fiber grating, thus make to occur tunable optical filter in described transmission spectrum stopband.
Optionally, described treatment facility, specifically for:
The wavelength of optical filter is controlled by the position of the hot spot controlling described thermal printer head; And/or
The width of optical filter is controlled by the length of the heating region controlling described thermal printer head; And/or
The transmitance of described optical filter is controlled by the temperature of the heating region controlling described thermal printer head.
Optionally, the bandwidth of described first fiber grating is identical with the bandwidth of described second fiber grating.
Second aspect, the embodiment of the present invention provides a kind of OSNR Monitoring Method, and be applied in the optical signal-to-noise ratio monitoring device in wave division multiplexing WDM system, described device comprises: optical fiber; First fiber grating, inscribes in described optical fiber; Second fiber grating, inscribes in described optical fiber; Thermal printer head, for heating described first fiber grating; Optical-electrical converter; Three ports light rings, the Single port of described three ports light rings is connected to described first fiber grating, the Two-port netwerk of described three ports light rings is connected to described second fiber grating, and three ports of described three port photocirculators are connected to described optical-electrical converter, and described method also comprises:
Control described thermal printer head to heat the primary importance of described first fiber grating;
Receive first signal of telecommunication that described optical-electrical converter obtains, described first signal of telecommunication is specially: described optical-electrical converter collection obtains the light signal of the filter pass band of described primary importance, then described light signal is carried out the signal of telecommunication that opto-electronic conversion obtains;
The first Optical Signal To Noise Ratio value of described wdm system is determined according to described first signal of telecommunication.
Optionally, described the first Optical Signal To Noise Ratio value determining described wdm system according to described first signal of telecommunication, specifically comprises:
Obtain the matched curve of described primary importance, in described matched curve, comprise the corresponding relation of the signal of telecommunication and Optical Signal To Noise Ratio;
Search in matched curve according to described first signal of telecommunication and obtain described first Optical Signal To Noise Ratio value.
Optionally, before the matched curve corresponding to the described primary importance of described acquisition, described method also comprises:
Control described thermal printer head to heat described primary importance;
Adjust the size of the Optical Signal To Noise Ratio at the filter pass band place of described primary importance, and then detect the acquisition multiple signals of telecommunication corresponding from multiple different Optical Signal To Noise Ratio;
Corresponding relation based on described multiple different Optical Signal To Noise Ratio and described multiple signal of telecommunication generates described matched curve.
Beneficial effect of the present invention is as follows:
Due in embodiments of the present invention, provide the optical signal-to-noise ratio monitoring device in a kind of wave division multiplexing WDM system, comprising: optical fiber; First fiber grating, inscribes in optical fiber; Second fiber grating, inscribes in optical fiber; Thermal printer head, for heating the first fiber grating; Thermal printer head driver, is connected to thermal printer head, for being controlled thermal printer head by control command; Treatment facility, is connected to thermal printer head driver, produces control command for thermotropism print head driver; Optical-electrical converter; Three ports light rings, the Single port of three ports light rings is connected to the first fiber grating, and the Two-port netwerk of three ports light rings is connected to the second fiber grating, and three ports of three port photocirculators are connected to optical-electrical converter; Wherein, the first control command produced at treatment facility control thermal printer head to the heating of the primary importance of the first fiber grating after, obtained the light signal of the filter pass band of primary importance by optical-electrical converter collection, and light signal is converted to the first electric signal transmission to treatment facility; Treatment facility is according to the first Optical Signal To Noise Ratio value of the first signal of telecommunication determination wdm system.As can be seen here, obtain first signal of telecommunication according to optical-electrical converter, just can determine the first Optical Signal To Noise Ratio value of wdm system, this device has that structure is simple, dispersion, polarization insensitive advantage, thus reach when measuring OSNR, reduce the technique effect of the requirement to checkout equipment.
Accompanying drawing explanation
Fig. 1 is the structure chart of optical signal-to-noise ratio monitoring device in the embodiment of the present invention;
Fig. 2 is the position relationship schematic diagram of heat sink, the first fiber grating in embodiment of the present invention optical signal-to-noise ratio monitoring device and thermal printer head;
Fig. 3 is the flow chart of OSNR Monitoring Method in the embodiment of the present invention.
Embodiment
The invention provides the optical signal-to-noise ratio monitoring device and method in a kind of wave division multiplexing WDM system, to solve in prior art when measuring OSNR, the technical problem higher to the requirement of checkout equipment.
Technical scheme in the embodiment of the present application is solve above-mentioned technical problem, and general thought is as follows:
Provide the optical signal-to-noise ratio monitoring device in a kind of wave division multiplexing WDM system, comprising: optical fiber; First fiber grating, inscribes in optical fiber; Second fiber grating, inscribes in optical fiber; Thermal printer head, for heating the first fiber grating; Thermal printer head driver, is connected to thermal printer head, for being controlled thermal printer head by control command; Treatment facility, is connected to thermal printer head driver, produces control command for thermotropism print head driver; Optical-electrical converter; Three ports light rings, the Single port of three ports light rings is connected to the first fiber grating, and the Two-port netwerk of three ports light rings is connected to the second fiber grating, and three ports of three port photocirculators are connected to optical-electrical converter; Wherein, the first control command produced at treatment facility control thermal printer head to the heating of the primary importance of the first fiber grating after, obtained the light signal of the filter pass band of primary importance by optical-electrical converter collection, and light signal is converted to the first electric signal transmission to treatment facility; Treatment facility is according to the first Optical Signal To Noise Ratio value of the first signal of telecommunication determination wdm system.As can be seen here, obtain first signal of telecommunication according to optical-electrical converter, just can determine the first Optical Signal To Noise Ratio value of wdm system, this device has that structure is simple, dispersion, polarization insensitive advantage, thus reach when measuring OSNR, reduce the technique effect of the requirement to checkout equipment.
In order to better understand technique scheme, below by accompanying drawing and specific embodiment, technical solution of the present invention is described in detail, the specific features being to be understood that in the embodiment of the present invention and embodiment is the detailed description to technical solution of the present invention, instead of the restriction to technical solution of the present invention, when not conflicting, the technical characteristic in the embodiment of the present invention and embodiment can combine mutually.
First aspect, the embodiment of the present invention provides the optical signal-to-noise ratio monitoring device in a kind of wave division multiplexing WDM system, this wdm system is such as: DWDM (the intensive optical wavelength-division multiplex of high speed: Dense WavelengthDivision Multiplexing) system, please refer to Fig. 1, this monitoring device comprises:
Optical fiber 1;
First fiber grating 2, inscribes in optical fiber 1, and the first fiber grating 2 is such as: linear chrip bragg grating, common bragg grating, phase shift bragg grating etc.; And as preferred embodiment, the first fiber grating 2 is linear chrip bragg grating, in this case, the tuning bandwidth of this wdm system is wider;
Second fiber grating 8, inscribes in optical fiber 1, and the second fiber grating 8 is such as: linear chrip bragg grating, common bragg grating, phase shift bragg grating etc.; And as preferred embodiment, the second fiber grating 8 is linear chrip bragg grating, in this case, the tuning bandwidth of this wdm system is wider;
Thermal printer head 3, for heating the first fiber grating 2;
Thermal printer head driver 5, is connected to thermal printer head 3, for being controlled thermal printer head 3 by control command;
Treatment facility 6, is connected to thermal printer head driver 5, produces control command for thermotropism print head driver 5, and processor 6 such as can be connected to thermal printer head driver 5 by data cable;
Optical-electrical converter 9, wherein the frequency response range of optical-electrical converter 9 covers the reflected waveband of the first fiber grating 2 and the second fiber grating 8, thus can complete function light signal being converted to the signal of telecommunication;
Three ports that the Two-port netwerk that the Single port of three ports light rings 7, three ports light rings 7 is connected to the first fiber grating 2, three ports light rings 7 is connected to the second fiber grating 8, three port photocirculator are connected to optical-electrical converter 9;
Wherein, the first control command produced at treatment facility control thermal printer head 3 to the heating of the primary importance of the first fiber grating 2 after, obtained the light signal of the filter pass band of primary importance by optical-electrical converter 9 collection, and light signal is converted to the first electric signal transmission to treatment facility; Treatment facility is according to the first Optical Signal To Noise Ratio value of the first signal of telecommunication determination wdm system.
In specific implementation process, thermal printer head 3 is rearranged by multiple hot spot.
Wherein, multiple hot spot close-packed arrays, each hot spot is corresponding with certain position of the first fiber grating 2, for heating this position.
In specific implementation process, before being monitored the OSNR in wdm system by this monitoring device, first need to demarcate the OSNR of wdm system, its calibration process is mainly performed by treatment facility, treatment facility, also for:
Control thermal printer head 3 pairs of primary importances to heat; The size of the Optical Signal To Noise Ratio at the filter pass band place of adjustment primary importance, and then detect the acquisition multiple signals of telecommunication corresponding from multiple different Optical Signal To Noise Ratio; Corresponding relation based on multiple different Optical Signal To Noise Ratio and multiple signal of telecommunication generates matched curve.
For example, take primary importance as 1550.116nm, the first fiber grating 2 is the first linear chirped fiber Bragg gratings, the second fiber grating 8 be the second linear chrip bragg grating is example, after erbium-doped fiber amplifier (erbium-doped fiber amplifier is in constant power output pattern) for the receiving terminal of wdm system, then first can produce control command by treatment facility and be sent to thermal printer head driver 5; Thermal printer head driver 5 is after receiving control command, by control command, thermal printer head 3 is controlled, thus the hot spot of corresponding 1550.116nm position starts heating on thermal printer head 3, diffraction characteristic at the 1550.116nm place of the first fiber grating 2 is destroyed, and occurs filter pass band (this filter pass band is such as: ultra-narrow bandwidth filter passband); Then the corresponding signal of telecommunication is obtained by optical-electrical converter 9;
By the size of signal or noise in adjustment fiber transmission link system, repeatedly can adjust the OSNR value at wdm system 1550.116nm filter pass band place, then the size of OSNR can be demarcated by spectrometer, when just can obtain different OSNR size by optical-electrical converter 9 collection, the size of the light signal of passband after filtering, and be converted into the signal of telecommunication, then export treatment facility to;
Treatment facility 6, after determining multiple different OSNR and the multiple signals of telecommunication corresponding from multiple different OSNR, just can be depicted as matched curve.
For the matched curve (such as: 1556nm, 1558nm) of other position, its matched curve of drawing mode and 1550.116nm place is similar, and then can based on the program, the situation at wired link, corresponding WDM channel allocation situation and each Channel Modulation form is transmitted, the matched curve of each channel of the system that obtains for specific optical fiber 1.Then other memory device being stored in treatment facility or being connected with treatment facility.
And then in specific implementation process, treatment facility 6, specifically for: determine the matched curve corresponding to primary importance, in matched curve, comprise the corresponding relation of the signal of telecommunication and Optical Signal To Noise Ratio; And according to searching acquisition first Optical Signal To Noise Ratio value in the first signal of telecommunication matched curve.
For example, when using this monitoring device, due to the first control command that treatment facility 6 thermotropism print head driver 5 sends, so treatment facility 6 directly can determine primary importance, be assumed to be: 1550.116nm, then treatment facility 6 determines the matched curve corresponding to 1550.116nm from the multiple matched curves stored, and then carries out searching in the matched curve corresponding to 1550.116nm by first signal of telecommunication just obtaining a corresponding OSNR value.
As further preferred embodiment, please continue to refer to Fig. 1 also with reference to figure 2, device also comprises:
Heat sink 2, heat sink 2, first fiber grating 2 and thermal printer head 3 are affixed, and wherein heat sink 2 for improving heat conduction velocity and stability.
As further preferred embodiment, treatment facility 6, also for: by controlling thermal printer head 3, first fiber grating 2 being heated, and then inserting phase shift in the transmission spectrum stopband of the first fiber grating 2, thus making to occur tunable optical filter in transmission spectrum stopband.
In specific implementation process, treatment facility 6 can by the control to thermal printer head 3, and then the control realized light filtering, enumerate three kinds of control modes wherein below, certainly, in specific implementation process, be not limited to following three kinds of modes, in addition, when not conflicting, three kinds of control modes can combinationally use below.
1. treatment facility 6, specifically for: the wavelength being controlled optical filter by the position of the hot spot controlling thermal printer head 3.
For example, being made up of multiple compact arranged hot spot of thermal printer head 3, the different wave length of the corresponding optical filter of this multiple compact arranged hot spot difference, so treatment facility 6 is when thermotropism print head driver 5 sending controling instruction, can based on the wavelength needing to produce, the hot spot controlling the correspondence of thermal printer head 3 heats.
2. treatment facility 6, specifically for: the width being controlled optical filter by the length of the heating region controlling thermal printer head 3.
3. treatment facility 6, specifically for: the transmitance being controlled optical filter by the temperature of the heating region controlling thermal printer head 3.
As further preferred embodiment, the bandwidth of the first fiber grating 2 is identical with the bandwidth of the second fiber grating 8, by circulator Single port is connected with the first fiber grating 2, the structure that second fiber grating 8 is connected with circulator Two-port netwerk, the noise of the reflectance spectrum passband filtering first fiber grating 2 transmission spectrum passband of the second fiber grating 8 can be utilized, thus the noise effect that in the first fiber grating 2 transmission spectrum, transmission frequency band brings can be eliminated.
Further, cooperatively interacted by the first linear chirped fiber Bragg gratings, three ports light rings 7 and the second linear chrip bragg grating, the noise jamming that ASE (amplified spontaneous emission: the amplified spontaneous emission) noise that causes due to the first linear chirped fiber Bragg gratings transmission spectrum passband brings can be eliminated.
Second aspect, based on same inventive concept, the embodiment of the present invention provides a kind of OSNR Monitoring Method, and be applied to the optical signal-to-noise ratio monitoring device in wave division multiplexing WDM system, please continue to refer to Fig. 1, device comprises: optical fiber 1; First fiber grating 2, inscribes in optical fiber 1; Second fiber grating 8, inscribes in optical fiber 1; Thermal printer head 3, for heating the first fiber grating 2; Optical-electrical converter 9; Three ports light rings 7, three ports that the Two-port netwerk that the Single port of three ports light rings 7 is connected to the first fiber grating 2, three ports light rings 7 is connected to the second fiber grating 8, three port photocirculator are connected to optical-electrical converter 9, please refer to Fig. 3, method comprises:
Step S301: control thermal printer head 3 and the primary importance of the first fiber grating 2 is heated;
Step S302: receive first signal of telecommunication that optical-electrical converter 9 obtains, first signal of telecommunication is specially: optical-electrical converter 9 collection obtains the light signal of the filter pass band of primary importance, then light signal is carried out the signal of telecommunication that opto-electronic conversion obtains;
Step S303: according to the first Optical Signal To Noise Ratio value of the first signal of telecommunication determination wdm system.
Optionally, according to the first Optical Signal To Noise Ratio value of the first signal of telecommunication determination wdm system, specifically comprise:
Obtain the matched curve of primary importance, in matched curve, comprise the corresponding relation of the signal of telecommunication and Optical Signal To Noise Ratio;
According to searching acquisition first Optical Signal To Noise Ratio value in the first signal of telecommunication matched curve.
Optionally, before obtaining the matched curve corresponding to primary importance, method also comprises:
Control thermal printer head 3 pairs of primary importances to heat;
The size of the Optical Signal To Noise Ratio at the filter pass band place of adjustment primary importance, and then detect the acquisition multiple signals of telecommunication corresponding from multiple different Optical Signal To Noise Ratio;
Corresponding relation based on multiple different Optical Signal To Noise Ratio and multiple signal of telecommunication generates matched curve.
The one or more embodiment of the present invention at least has following beneficial effect:
Due in embodiments of the present invention, provide the optical signal-to-noise ratio monitoring device in a kind of wave division multiplexing WDM system, comprising: optical fiber; First fiber grating, inscribes in optical fiber; Second fiber grating, inscribes in optical fiber; Thermal printer head, for heating the first fiber grating; Thermal printer head driver, is connected to thermal printer head, for being controlled thermal printer head by control command; Treatment facility, is connected to thermal printer head driver, produces control command for thermotropism print head driver; Optical-electrical converter; Three ports light rings, the Single port of three ports light rings is connected to the first fiber grating, and the Two-port netwerk of three ports light rings is connected to the second fiber grating, and three ports of three port photocirculators are connected to optical-electrical converter; Wherein, the first control command produced at treatment facility control thermal printer head to the heating of the primary importance of the first fiber grating after, obtained the light signal of the filter pass band of primary importance by optical-electrical converter collection, and light signal is converted to the first electric signal transmission to treatment facility; Treatment facility is according to the first Optical Signal To Noise Ratio value of the first signal of telecommunication determination wdm system.As can be seen here, obtain first signal of telecommunication according to optical-electrical converter, just can determine the first Optical Signal To Noise Ratio value of wdm system, this device has that structure is simple, dispersion, polarization insensitive advantage, thus reach when measuring OSNR, reduce the technique effect of the requirement to checkout equipment.
Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (10)
1. the optical signal-to-noise ratio monitoring device in wave division multiplexing WDM system, is characterized in that, comprising:
Optical fiber;
First fiber grating, inscribes in described optical fiber;
Second fiber grating, inscribes in described optical fiber;
Thermal printer head, for heating described first fiber grating;
Thermal printer head driver, is connected to described thermal printer head, for being controlled described thermal printer head by control command;
Treatment facility, is connected to described thermal printer head driver, for producing described control command to described thermal printer head driver;
Optical-electrical converter;
Three ports light rings, the Single port of described three ports light rings is connected to described first fiber grating, the Two-port netwerk of described three ports light rings is connected to described second fiber grating, and three ports of described three port photocirculators are connected to described optical-electrical converter;
Wherein, the first control command produced at described treatment facility controls described thermal printer head to after the primary importance heating of described first fiber grating, obtained the light signal of the filter pass band of described primary importance by described optical-electrical converter collection, and described light signal is converted to the first electric signal transmission to described treatment facility; Described treatment facility determines the first Optical Signal To Noise Ratio value of described wdm system according to described first signal of telecommunication.
2. device as claimed in claim 1, it is characterized in that, described device also comprises:
Heat sink, described heat sink, described first fiber grating and described thermal printer head are affixed.
3. device as claimed in claim 1, is characterized in that, described treatment facility, specifically for: determine the matched curve corresponding to described primary importance, in described matched curve, comprise the corresponding relation of the signal of telecommunication and Optical Signal To Noise Ratio; And in matched curve according to described first signal of telecommunication, search the described first Optical Signal To Noise Ratio value of acquisition.
4. device as claimed in claim 1, is characterized in that, described treatment facility, also for:
Control described thermal printer head to heat described primary importance; Adjust the size of the Optical Signal To Noise Ratio at the filter pass band place of described primary importance, and then detect the acquisition multiple signals of telecommunication corresponding from multiple different Optical Signal To Noise Ratio; Corresponding relation based on described multiple different Optical Signal To Noise Ratio and described multiple signal of telecommunication generates described matched curve.
5. the device as described in as arbitrary in claim 1-4, it is characterized in that, described treatment facility, also for: by controlling described thermal printer head, described first fiber grating is heated, and then insert phase shift in the transmission spectrum stopband of described first fiber grating, thus make to occur tunable optical filter in described transmission spectrum stopband.
6. device as claimed in claim 5, is characterized in that, described treatment facility, specifically for:
The wavelength of optical filter is controlled by the position of the hot spot controlling described thermal printer head; And/or
The width of optical filter is controlled by the length of the heating region controlling described thermal printer head; And/or
The transmitance of described optical filter is controlled by the temperature of the heating region controlling described thermal printer head.
7. the device as described in as arbitrary in claim 1-4, it is characterized in that, the bandwidth of described first fiber grating is identical with the bandwidth of described second fiber grating.
8. an OSNR Monitoring Method, be applied in the optical signal-to-noise ratio monitoring device in wave division multiplexing WDM system, described device comprises: optical fiber; First fiber grating, inscribes in described optical fiber; Second fiber grating, inscribes in described optical fiber; Thermal printer head, for heating described first fiber grating; Optical-electrical converter; Three ports light rings, the Single port of described three ports light rings is connected to described first fiber grating, the Two-port netwerk of described three ports light rings is connected to described second fiber grating, three ports of described three port photocirculators are connected to described optical-electrical converter, it is characterized in that, described method also comprises:
Control described thermal printer head to heat the primary importance of described first fiber grating;
Receive first signal of telecommunication that described optical-electrical converter obtains, described first signal of telecommunication is specially: described optical-electrical converter collection obtains the light signal of the filter pass band of described primary importance, then described light signal is carried out the signal of telecommunication that opto-electronic conversion obtains;
The first Optical Signal To Noise Ratio value of described wdm system is determined according to described first signal of telecommunication.
9. method as claimed in claim 8, it is characterized in that, described the first Optical Signal To Noise Ratio value determining described wdm system according to described first signal of telecommunication, specifically comprises:
Obtain the matched curve of described primary importance, in described matched curve, comprise the corresponding relation of the signal of telecommunication and Optical Signal To Noise Ratio;
Search from described matched curve according to described first signal of telecommunication and obtain described first Optical Signal To Noise Ratio value.
10. method as claimed in claim 8 or 9, it is characterized in that, before the matched curve corresponding to the described primary importance of described acquisition, described method also comprises:
Control described thermal printer head to heat described primary importance;
Adjust the size of the Optical Signal To Noise Ratio at the filter pass band place of described primary importance, and then detect the acquisition multiple signals of telecommunication corresponding from multiple different Optical Signal To Noise Ratio;
Corresponding relation based on described multiple different Optical Signal To Noise Ratio and described multiple signal of telecommunication generates described matched curve.
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| CN105007122A (en) * | 2015-07-17 | 2015-10-28 | 博为科技有限公司 | Optical transceiving device based on Peltier refrigerating and heating effect |
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| CN104601223B (en) | 2017-04-12 |
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