CN110212977A - A kind of wavelength and power monitor device - Google Patents
A kind of wavelength and power monitor device Download PDFInfo
- Publication number
- CN110212977A CN110212977A CN201910498102.3A CN201910498102A CN110212977A CN 110212977 A CN110212977 A CN 110212977A CN 201910498102 A CN201910498102 A CN 201910498102A CN 110212977 A CN110212977 A CN 110212977A
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- China
- Prior art keywords
- wavelength
- filter module
- optical signal
- monitor device
- power monitor
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Classifications
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- 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
- H04B10/07955—Monitoring or measuring power
-
- 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
- H04B10/07957—Monitoring or measuring wavelength
Abstract
The present invention relates to power monitoring fields, and in particular to a kind of power monitor device.The wavelength and power monitor device include the optical signal input set gradually, level-one filter module, secondary filter module and the receiving end PD；Wherein, the optical signal of multi-wavelength is inputted from optical signal input, and carries out the coarse filtration wave in a wide range of by level-one filter module, then the fine filtering wave of a small range is carried out by secondary filter module, it reenters and is incident upon in the receiving end PD, to realize wavelength of optical signal monitoring and power monitoring.The present invention carries out secondary filtering by using twin-stage filter module, to the optical signal of optical system, especially optical fiber telecommunications system, such as optic communication wdm system, to meet the acquisition requirement of the receiving end PD, to improve supervisory wavelength precision and stability；Further, the problem of avoiding supervisory wavelength accuracy inaccurate, not can be carried out configurable channel wavelength monitoring and compensation.
Description
Technical field
The present invention relates to wavelength and power monitoring fields, and in particular to a kind of wavelength and power monitor device, and it is based on light
The wavelength and power monitor device of fiber communication system.
Background technique
Optical fiber telecommunications system be using light as carrier wave, using the glass-pulling of very high purity at superfine optical fiber as pass
Defeated medium is used up by light-to-current inversion to transmit the communication system of information.
Optical fiber telecommunications system possesses high bandwidth and low transmission loss, realizes usually using wdm system, multiple by wavelength-division
With (WDM) technology, it can be achieved that in 1 optical fiber, the optical signal of multiple and different wavelength, the transmission capacity multiplication of fiber optic communication are transmitted.
Fiber optic communication has the advantages that message capacity is big, long transmission distance, and the potential bandwidth of an optical fiber is up to 20THz, using in this way
Bandwidth, only need one second or so, can whole written historical materials transmission finish at all times by the mankind；And 400GHz system is
Investment business uses, or even optical fiber transmission can be made to reach too bps magnitude (1Tb/s=1000Gb/s).
In a wdm system, discrete signal is transmitted in same optical fiber by different wave length；In a communications system, discrete letter
Number number of wavelengths be to be determined by the bandwidth of the system, and to occupy determining channel spacing in systems wide for the bandwidth of each wavelength
Degree；The channel spacing width of adjacent wavelength is smaller, is about easy to produce the crosstalk of interchannel.
In order to make the maximization of available channel in wdm system, it is necessary to which LD laser works are in stable power and wavelength；
But many LD lasers will receive temperature, aging and the unstable influence of mode lead to wavelength shift, the offset of wavelength exists
It can cause interchannel crosstalk in WMD system, so as to cause the loss of communication data, therefore, be needed in a wdm system to channel wave
Length is monitored and compensates.
The existing monitoring and compensation that wavelength can be realized using following technology, such as technology 1:Movable mirror with
Linear variable filter and PDs, technology 2:MEMS tilt mirror with reflection grating
And PDs, technology 3:Tunable fiber grating with fixed fiber grating and PDs, technology 4:
LCoS based switch array with overlapping grating and PDs, technology 5:MEMS tilt
Mirror TF+multiport switch+large grating+lens array+AWG and PD array, technology 6:
Coherent receiver+Tunable laser source+Etalon+PDs, technology 7:MEMS tilt mirror+
reflection grating+Etalon+PDs。
But there is merits and demerits in above-mentioned technology.
About technology 1, advantage: Movable mirror scheme is flexibly, it can be achieved that property is strong；Disadvantage: linear variable
Filter is not easily accomplished, and stability is poor.About technology 2, advantage: MEMS tilt mirror scheme flexibly, it can be achieved that property is strong,
Reflection grating is easy preparation；Disadvantage: reflection grating precision is poor, actually uses unstable.It closes
In technology 3, advantage: compact-sized degree is high；Disadvantage: fiber grating preparation is difficult, at high cost.About technology 4, advantage: compact-sized
Degree is high；Disadvantage: LCoS technology is to be improved, at high cost.About technology 5, advantage: the principle of work and power is simple, disadvantage: practical preparation structure
Complexity, component is on the high side, at high cost.About technology 6, advantage: supervisory wavelength confirms that precision is high, narrow bandwidth, disadvantage: coherent reception
Device+Tunable Laser Technology is complicated, at high cost.About technology 7, advantage: structure is simple, easy to accomplish；Disadvantage: reflection
Grating precision is poor, actually uses unstable.
Summary of the invention
The technical problem to be solved in the present invention is that in view of the above drawbacks of the prior art, a kind of wavelength and power are provided
Monitoring device, solving the problem of that supervisory wavelength accuracy is inaccurate not can be carried out configurable channel wavelength monitoring and compensation.
The technical solution adopted by the present invention to solve the technical problems is: a kind of wavelength and power monitor device, the wave
Long and power monitor device includes that the optical signal input set gradually, level-one filter module, secondary filter module and PD are received
End；Wherein, the optical signal of multi-wavelength is inputted from optical signal input, and carries out the coarse filtration in a wide range of by level-one filter module
Wave, then by the fine filtering wave of secondary filter module progress a small range, reenter and be incident upon in the receiving end PD, to realize wavelength of optical signal
Monitoring and power monitoring.
The technical solution adopted by the present invention to solve the technical problems is: a kind of wavelength and function based on optical fiber telecommunications system
Rate monitoring device, the wavelength and power monitor device include the optical signal input set gradually, level-one filter module, second level
Filter module and the receiving end PD；Wherein, the multiple wavelength optical signal of optical fiber telecommunications system is inputted from optical signal input, and passes through one
Grade filter module carries out the coarse filtration wave in a wide range of, then the fine filtering wave of a small range, re-incident are carried out by secondary filter module
Into the receiving end PD, to realize the wavelength of optical signal and power monitoring of optical fiber telecommunications system.
Wherein, preferred version is: the level-one filter module includes the MEMS light change mirror of transmission grating and adjustable angle, is led to
The angular adjustment for crossing MEMS light change mirror carries out coarse filtration wave in big wave-length coverage.
Wherein, preferred version is: the MEMS light change mirror is the first MEMS mirror, the wavelength and power monitor device
Including the optical fiber pigtail being connected to optical signal input, the input/output terminal of the optical fiber pigtail is connected to level-one filter module,
Its output end is connected to secondary filter module.
Wherein, preferred version is: the slanted transmission grating of the transmission grating, and the optical signal of multi-wavelength is from optical fiber pigtail
Input/output terminal is input to slanted transmission grating, reenters and is incident upon the first MEMS mirror, passes through the angle of the first MEMS mirror
Adjust reflection and incident by the input/output terminal of slanted transmission grating incidence to optical fiber pigtail, then from the output end of optical fiber pigtail
Into secondary filter module.
Wherein, preferred version is: the level-one filter module includes liquid crystal chip, and the voltage by adjusting liquid crystal chip exists
Coarse filtration wave is carried out in big wave-length coverage.
Wherein, preferred version is: the secondary filter module includes thermal tuning etalon or angle tuning etalon.
Wherein, preferred version is: the material of the thermal tuning etalon or angle tuning etalon is Si or SiO2 material
Matter, and it is covered with the plated film of enhancing reflectivity or transmissivity.
Wherein, preferred version is: the secondary filter module is angle tuning etalon, the wavelength and power monitoring dress
Setting further includes the second MEMS mirror that secondary filter module front end is arranged in.
Wherein, preferred version is: the wavelength and power monitor device are also built-in with LD laser and wavelength locking module,
To carry out wavelength self calibration.
The beneficial effects of the present invention are compared with prior art, the present invention is by using twin-stage filter module, to optics
The optical signal of system, especially optical fiber telecommunications system carries out secondary filtering, such as optic communication wdm system, to meet the receiving end PD
Acquisition requirement, to improve supervisory wavelength precision and stability；Further, avoid supervisory wavelength accuracy inaccurate, it cannot
The problem of carrying out configurable channel wavelength monitoring and compensation.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing:
Fig. 1 is the structural schematic diagram of wavelength of the present invention and power monitor device；
Fig. 2 is the structural schematic diagram of wavelength of the present invention and power monitor device embodiment one；
Fig. 3 is the structural schematic diagram of wavelength of the present invention and power monitor device embodiment two；
Fig. 4 is the structural schematic diagram of wavelength of the present invention and power monitor device embodiment three；
Fig. 5 is the structural schematic diagram of wavelength of the present invention and power monitor device example IV；
Fig. 6 is that the present invention is built-in with the wavelength of LD laser and wavelength locking module and the structural representation of power monitor device
Figure.
Specific embodiment
Now in conjunction with attached drawing, elaborate to presently preferred embodiments of the present invention.
As shown in Figure 1, the present invention provides the preferred embodiment of wavelength and power monitor device.
A kind of wavelength and power monitor device, the wavelength and power monitor device include the optical signal input set gradually
End 100, level-one filter module 200, secondary filter module 300 and the receiving end PD 400；Wherein, the optical signal of multi-wavelength is believed from light
Number input terminal 100 inputs, and carries out the coarse filtration wave in a wide range of by level-one filter module 200, then pass through secondary filter module
300 carry out the fine filtering wave of a small range, reenter and are incident upon in the receiving end PD 400, to realize wavelength of optical signal and power monitoring.
Wherein, a wide range of interior coarse filtration wave refers to that the optical signal band wide scope for being incident to level-one filter module 200 is big,
" thick " is described in the bandwidth relative to the optical signal for being finally incident to the receiving end PD 400；Similarly, the small range
Interior fine filtering wave refers to that the optical signal band wide scope for being incident to secondary filter module 300 is small, is to be incident to level-one filtering with above-mentioned
The optical signal of module 200 is reference, and " thin " is the bandwidth institute relative to the optical signal for being finally incident to the receiving end PD 400
Description.
Further, a kind of wavelength and power monitor device based on optical fiber telecommunications system, optical fiber telecommunications system are also provided
Multiple wavelength optical signal inputted from optical signal input 100, and the coarse filtration in a wide range of is carried out by level-one filter module 200
Wave, then by the fine filtering wave of the progress a small range of secondary filter module 300, reenter and be incident upon in the receiving end PD 400, to realize optical fiber
The wavelength of optical signal and power monitoring of communication system.
Specifically, optical system, such as optical fiber telecommunications system, the optical signal with multiple wavelength of transmission are acquired, and is transmitted
Into optical signal input 100, optical wavelength and power monitoring are realized to be incident to wavelength and power monitor device；Pass through first-level filtering
First optical signal of big bandwidth is filtered by wave module 200, and selection adjusts the smaller bandwidth in the first optical signal of acquisition with shape
At the second optical signal, the bandwidth of the bandwidth of second optical signal less than the first optical signal；By secondary filter module 300 will in
Second optical signal of bandwidth is filtered, and is divided and is obtained the smaller bandwidth in the second optical signal to form third optical signal, institute
State bandwidth of the bandwidth less than the second optical signal of third optical signal；The receiving end PD 400 is preferably photodiode (Photo-
Diode) the semiconductor devices being made of a PN junction has one direction conductive characteristic.
For example, in fiber optic communication systems, the frequency range of the first optical signal of acquisition is 5000GHz, and level-one filters
Module 200 then selects the second optical signal of 150GHz bandwidth therein and secondary filter mould to select the second optical signal wherein
Bandwidth be 2GHz third signal, and now wherein one section be incident to the receiving end PD 400.
As shown in Figures 2 to 5, the present invention provides the preferred embodiment of level-one filter module.
Level-one filter module 200 provides two kinds of preferred versions.
Scheme one,
The level-one filter module 200 includes the MEMS light change mirror of transmission grating 211 and adjustable angle, is become by MEMS light
The angular adjustment of mirror selects the optical signal of a Duan Geng little bandwidth.The first optical signal exported from optical signal input 100 is incident to
Transmission grating 211 is becoming mirror to MEMS light, is realized by transmission grating 211 and is filtered the first optical signal of big bandwidth,
Become mirror selection by MEMS light and adjusts the second corresponding optical signal.
Further, the MEMS light becomes mirror as the first MEMS mirror 212, and the wavelength and power monitor device include
The optical fiber pigtail 110 being connected to optical signal input 100, the input/output terminal and level-one filter module of the optical fiber pigtail 110
200 connections, output end are connected to secondary filter module 300.Specifically, optical signal input 100 projects the first optical signal extremely
Optical fiber pigtail 110, and the first optical signal is exported to transmission grating by the delivery outlet of the input/output terminal of the optical fiber pigtail 110
211, then transmission grating 211 is reflected back by the first MEMS mirror 212, the second optical signal is formed, reenters and is incident upon the optical fiber
The input port of the input/output terminal of tail optical fiber 110 is exported from the output end of optical fiber pigtail 110 into secondary filter module 300, warp
It crosses the filtering of secondary filter module 300 and forms third optical signal, reenter and be incident upon in the receiving end PD 400.
In the present embodiment, the slanted transmission grating 211 of the transmission grating 211, the optical signal of multi-wavelength is from optical fiber tail
The input/output terminal of fibre 110 is input to slanted transmission grating 211, reenters and is incident upon the first MEMS mirror 212, passes through the first MEMS
The angular adjustment of reflecting mirror 212 reflects and is incident to by slanted transmission grating 211 input/output terminal of optical fiber pigtail 110, then
It is incident in secondary filter module 300 from the output end of optical fiber pigtail 110.
Preferably, the slanted transmission grating 211 of slight inclination can be described as approximate 45 ° of placement gratings, so as to may be implemented
After MENS reflected light is again by grating, filter function is realized.Also, more meet by the way that the realization of slanted transmission grating 211 is more excellent
It is required that optical path, or realize subsequent structural miniaturization, compact designed.
Scheme two,
The level-one filter module 200 includes liquid crystal chip 221, by adjusting the voltage of liquid crystal chip 221 in big wavelength
Coarse filtration wave is carried out in range, realizes function identical with scheme one.And principle is the liquid crystal material in liquid crystal chip 221,
By the control of applied voltage signal, to change the polarization state of liquid crystal material, different polarization states corresponds to different transmission wavelength,
Realize the function of filtering.
Relative to scheme one, optical signal can be filtered directly by liquid crystal chip 221, and be transmitted to secondary filter module 300
In.
As shown in Figures 2 to 5, the present invention provides the preferred embodiment of secondary filter module.
The secondary filter module 300 includes the etalon310 of the thermal tuning or etalon310 of angle tuning.
Further, the material of the thermal tuning etalon310 or angle tuning etalon310 is Si or SiO2 material
Matter, and it is covered with the plated film of enhancing reflectivity or transmissivity.
In the present embodiment, the wavelength and power monitor device further include that 300 front end of secondary filter module is arranged in
Second MEMS mirror 320.Wherein, the effect of the second MEMS mirror 320 is to change the incidence for the light for being incident to Etalon310
Angle meets more excellent more satisfactory optical path, or realizes subsequent structural miniaturization, compact designed.
With reference to Fig. 2, the preferred embodiment one of wavelength and power monitor device is provided.
Signal input part receives the optical signal with multiple wavelength, and is incident in optical fiber pigtail 110, reenters and is incident upon first
It to carry out converging beam in lens 213, reenters and is incident upon in transmission grating 211, reenter and be incident upon in the first MEMS mirror 212, and
It is reflected back by the first MEMS mirror 212, passes sequentially through transmission grating 211, the first lens 213 and optical fiber pigtail 110, it is incident
To the second lens 330 to carry out converging beam, reenters and be incident upon in the second MEMS mirror 320, reflex to secondary filter module 300
Etalon310 in, reenter and be incident upon in the receiving end PD 400.
With reference to Fig. 3, the preferred embodiment two of wavelength and power monitor device is provided.
Substantially similar to Fig. 2, in addition to it is subsequent be incident to the second lens 330 to carry out converging beam from optical fiber pigtail 110 after,
Optical signal can be directly transmitted in the etalon310 of secondary filter module 300, reentered and be incident upon in the receiving end PD 400.
With reference to Fig. 4, the preferred embodiment three of wavelength and power monitor device is provided.
Signal input part receives the optical signal with multiple wavelength, and is incident in optical fiber pigtail 110, reenters and is incident upon third
It to carry out converging beam in lens 222, reenters and is incident upon in liquid crystal chip 221, then be directly transmitted to secondary filter module 300
In etalon310, reenters and be incident upon in the receiving end PD 400.
With reference to Fig. 5, the preferred embodiment four of wavelength and power monitor device is provided.
Substantially similar to Fig. 4, after subsequent be incident in liquid crystal chip 221, optical signal can first be incident to the 3rd MEMS
Reflecting mirror 340 is being incident to the second lens 330 to carry out converging beam, is re-shooting the etalon310 of secondary filter module 300
In, it reenters and is incident upon in the receiving end PD 400.
As shown in fig. 6, the present invention provides the preferred embodiment of wavelength and power monitor device.
The wavelength and power monitor device are also built-in with LD laser and wavelength locking module 500, to carry out wavelength certainly
Calibration.Using etalon310 and built-in LD laser and wavelength locking module 500, guarantee the precision and reliability of product.
Further, the wavelength and power monitor device are the monitoring module of OCM product 10, to improve OCM product 10
Supervisory wavelength precision and stability.Wherein, the setting position of LD laser and wavelength locking module 500 is by specifically producing in OCM
The structure design position of product 10 determines that, without designated position, function is: LD laser exports the light letter of specific wavelength
Number, it is tested and is calibrated in wavelength locker (i.e. wavelength locking module) first, then by optical signal switching to OCM product 10
In tested, by twice test optical signal structure be compared, to judge the wavelength measurement accuracy of OCM product 10.
Wherein, OCM product 10 is Optical channel monitor.
As described above, only preferred embodiment is not intended to limit the scope of the present invention, Fan Yibenfa
Equivalent change or modification made by bright claim is all that the present invention is covered.
Claims (10)
1. a kind of wavelength and power monitor device, it is characterised in that: the wavelength and power monitor device include setting gradually
Optical signal input, level-one filter module, secondary filter module and the receiving end PD；Wherein, the optical signal of multi-wavelength is from optical signal
Input terminal input, and the coarse filtration wave in a wide range of is carried out by level-one filter module, then small model is carried out by secondary filter module
Interior fine filtering wave is enclosed, reenters and is incident upon in the receiving end PD, to realize wavelength of optical signal monitoring and power monitoring.
2. a kind of wavelength and power monitor device based on optical fiber telecommunications system, it is characterised in that: the wavelength and power monitoring
Device includes the optical signal input set gradually, level-one filter module, secondary filter module and the receiving end PD；Wherein, optical fiber
The multiple wavelength optical signal of communication system is inputted from optical signal input, and carries out the coarse filtration in a wide range of by level-one filter module
Wave, then by the fine filtering wave of secondary filter module progress a small range, reenter and be incident upon in the receiving end PD, to realize fiber optic communication system
The wavelength of optical signal and power monitoring of system.
3. wavelength according to claim 1 or 2 and power monitor device, it is characterised in that: the level-one filter module packet
The MEMS light for including transmission grating and adjustable angle becomes mirror, is carried out in big wave-length coverage slightly by the angular adjustment that MEMS light becomes mirror
Filtering.
4. wavelength according to claim 3 and power monitor device, it is characterised in that: the MEMS light becomes mirror as first
MEMS mirror, the wavelength and power monitor device include the optical fiber pigtail being connected to optical signal input, the optical fiber tail
Fine input/output terminal is connected to level-one filter module, and output end is connected to secondary filter module.
5. wavelength according to claim 4 and power monitor device, it is characterised in that: the slanted transmission of the transmission grating
The optical signal of grating, multi-wavelength is input to slanted transmission grating from the input/output terminal of optical fiber pigtail, reenters and is incident upon the first MEMS
Reflecting mirror is reflected by the angular adjustment of the first MEMS mirror and by the input of slanted transmission grating incidence to optical fiber pigtail
Output end, then be incident in secondary filter module from the output end of optical fiber pigtail.
6. wavelength according to claim 1 or 2 and power monitor device, it is characterised in that: the level-one filter module packet
Liquid crystal chip is included, the voltage by adjusting liquid crystal chip carries out coarse filtration wave in big wave-length coverage.
7. wavelength according to claim 1 or 2 and power monitor device, it is characterised in that: the secondary filter module packet
Include thermal tuning etalon or angle tuning etalon.
8. wavelength according to claim 7 and power monitor device, it is characterised in that: the thermal tuning etalon or angle
The material of degree tuning etalon is Si or SiO2 material, and is covered with the plated film of enhancing reflectivity or transmissivity.
9. wavelength according to claim 1 or 2 and power monitor device, it is characterised in that: the secondary filter module is
Angle tuning etalon, the wavelength and power monitor device further include be arranged in secondary filter module front end the 2nd MEMS it is anti-
Penetrate mirror.
10. wavelength according to claim 1 or 2 and power monitor device, it is characterised in that: the wavelength and power monitoring
Device is also built-in with LD laser and wavelength locking module, to carry out wavelength self calibration.
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|---|---|---|---|
| CN201910498102.3A CN110212977A (en) | 2019-06-10 | 2019-06-10 | A kind of wavelength and power monitor device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910498102.3A CN110212977A (en) | 2019-06-10 | 2019-06-10 | A kind of wavelength and power monitor device |
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Application publication date: 20190906 |