CN106768398A - The method of testing and device of a kind of source phase noise - Google Patents
The method of testing and device of a kind of source phase noise Download PDFInfo
- Publication number
- CN106768398A CN106768398A CN201611091652.6A CN201611091652A CN106768398A CN 106768398 A CN106768398 A CN 106768398A CN 201611091652 A CN201611091652 A CN 201611091652A CN 106768398 A CN106768398 A CN 106768398A
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- phase
- fibre optic
- signal
- fiber
- 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.)
- Pending
Links
- 238000010998 test method Methods 0.000 title claims description 5
- 239000000835 fiber Substances 0.000 claims abstract description 95
- 239000013307 optical fiber Substances 0.000 claims abstract description 93
- 238000000034 method Methods 0.000 claims abstract description 32
- 238000012360 testing method Methods 0.000 claims abstract description 12
- 238000005259 measurement Methods 0.000 claims abstract description 11
- 230000005540 biological transmission Effects 0.000 claims abstract description 7
- 229940085805 fiberall Drugs 0.000 claims description 5
- 239000000523 sample Substances 0.000 claims description 4
- 230000011514 reflex Effects 0.000 claims description 2
- 238000004891 communication Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000001427 coherent effect Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000005693 optoelectronics Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J9/00—Measuring optical phase difference; Determining degree of coherence; Measuring optical wavelength
- G01J9/02—Measuring optical phase difference; Determining degree of coherence; Measuring optical wavelength by interferometric methods
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/30—Testing of optical devices, constituted by fibre optics or optical waveguides
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J9/00—Measuring optical phase difference; Determining degree of coherence; Measuring optical wavelength
- G01J9/02—Measuring optical phase difference; Determining degree of coherence; Measuring optical wavelength by interferometric methods
- G01J2009/0226—Fibres
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J9/00—Measuring optical phase difference; Determining degree of coherence; Measuring optical wavelength
- G01J9/02—Measuring optical phase difference; Determining degree of coherence; Measuring optical wavelength by interferometric methods
- G01J2009/0249—Measuring optical phase difference; Determining degree of coherence; Measuring optical wavelength by interferometric methods with modulation
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Optics & Photonics (AREA)
- Instruments For Measurement Of Length By Optical Means (AREA)
Abstract
The invention discloses the method for testing and device of a kind of source phase noise, the method sets phase-modulator on the optical fiber of delay all the way of fibre optic interferometer first, and to phase-modulator load-modulate signal；Secondly by light signal along Optical Fiber Transmission to fibre optic interferometer, the interference signal generated by modulated signal modulation optical fiber interferometer；The interference signal modulated is demodulated using the method for phase generated carrier demodulation method or working point control finally, the phase noise signal of light source is obtained, the measurement of source phase noise is realized.The device sets phase-modulator by the optical fiber of delay all the way of fibre optic interferometer, cleverly use the fibre optic interferometer with short distance difference, synchronously carry out phase-modulation and interference signal collection, according to the modulation waveform of interference, phase noise is calculated by demodulating algorithm, the direct measurement of source phase noise is completed.High frequency detector and high frequency acquisition system are not needed, the structure of system is enormously simplify, the price of product is reduced.
Description
Technical field
The invention belongs to technical field of optical fiber, the method for testing and device of more particularly to a kind of source phase noise.
Background technology
In laser radar, coherent light optic communication, coherent detection optical fiber sensing system, the phase noise of light source is influence system
The key technical index of performance of uniting.The line width of light source is lower, source phase noise is lower thus general by measuring laser
Line width is used to characterize the phase noise of laser.
The measuring method of Light source line width mainly has light heterodyne method and optical fiber delay self-heterodyne method, and light heterodyne method is steady using one
Fixed standard sources carries out heterodyne with measured light, and the direction is high to standard sources line width and stability requirement, it is difficult to practical.
Light source output light is divided into two beams by optical fiber delay self-heterodyne method, and two-beam is by after different time delay and shift frequency, then carries out from outer
Difference obtains the fitting line width of light source.The length of time delay optical fiber determines that line width is narrower by the line width of light source, and required optical fiber is more long.
For the light source of 10kHz even more narrow linewidths, in order to reduce the fluctuation of spectral line, the accuracy of measurement, time delay fiber lengths are improved
Need to increase to kilometers up to a hundred, this causes the systems bulky, relatively costly, be affected by the external environment big, and with optical fiber
The increase of length, optical fiber insertion loss and polarization can bring new problem again, therefore the method is difficult to practicality.Both the above method
What is measured is the line width of light source, and it is an important indicator for weighing source phase noise level, and the line width values are to pass through
Intend chummy, accuracy is not high.
In the optical systems such as coherent light communication, laser radar and Fibre Optical Sensor, by the two-way in optical fiber or space or
Multi-path laser interference obtains interference light intensity, and then analysis is sensed or communication physical amount.The phase noise of light source determines dry
The Noise Background of light intensity is related to, the Noise Background of system is equally also determined, it is final by directly reflection communication and sensor-based system
The important indicators such as noise level, traffic rate and detectivity.Therefore communication and sensor-based system application are more concerned with the straight of light source
Phase noise is connect, the Direct Phase noise for obtaining light source is conducive to grasping the noiseproof feature of whole system.Present invention seek to address that
The direct test problem of phase noise of light source, for the communication of light source and Application in Sensing provide a more direct index.
The content of the invention
The invention provides the method for testing and device of a kind of source phase noise, it is intended that overcoming prior art
In cannot direct measurement source phase noise problem.
A kind of method of testing of source phase noise, first, phase is set on the optical fiber of delay all the way of fibre optic interferometer
Modulator, and to phase-modulator load-modulate signal；Secondly, by light signal along Optical Fiber Transmission to fibre optic interferometer, pass through
The interference signal of modulated signal modulation optical fiber interferometer generation；Finally, using phase generated carrier demodulation method or operating point
The method of control is demodulated to the interference signal modulated, and obtains the phase noise signal of light source, realizes source phase noise
Measurement.
Light signal is divided into two-way using fiber coupler, a curb optical fiber is transmitted to centre by photodetector
Reason unit carries out light signal strength test, another curb Optical Fiber Transmission to fibre optic interferometer.
A kind of test device of source phase noise, based on above-mentioned method, including tail optical fiber 2, fibre optic interferometer 20, first
Fiber-optical probe 10 and CPU 11；
Wherein, it is provided with phase-modulator 8 on the optical fiber of delay all the way in the fibre optic interferometer；
The tail optical fiber 2 is connected with the signal input part of the fibre optic interferometer；
The signal output part of the fibre optic interferometer gathers mould through the first photodetector 10 with the AD of CPU
Block is connected；
The DA output modules of the CPU are connected with the phase-modulator in fibre optic interferometer.
Further, the fibre optic interferometer includes the one 1 × 2nd fiber coupler 5, postpones optical fiber, the 21 × 2nd optical fiber
Coupler 7 and phase-modulator 8；
Two output ends of the one 1 × 2nd fiber coupler postpone optical fiber and the 21 × 2nd optical fiber coupling through two-way respectively
The input of clutch 7 is connected, wherein postponing to be provided with phase-modulator 8 on optical fiber all the way；
The output end of the 21 × 2nd fiber coupler 7 is gathered through the AD of the first photodetector and CPU
Module is connected.
Further, the fibre optic interferometer includes 2 × 2 fiber couplers 17, postpones optical fiber, the first optical fiber faraday rotation
Light microscopic 18, the second optical fiber faraday polariscope 19 and phase-modulator 8；
The incoming output end of the signal of 2 × 2 fiber coupler 17 postpones optical fiber and the first optical fiber faraday through two-way respectively
Polariscope 18, the second optical fiber faraday polariscope 19 are connected, wherein postponing to be provided with phase-modulator 8 on optical fiber all the way；
The signal reflex output end of 2 × 2 fiber coupler 17 is through the second photodetector and CPU phase
Even.
Further, also including the 3rd fiber coupler 4 and the second photodetector 9；
Light signal is divided into two-way through fiber coupler, is connected with fibre optic interferometer all the way, the smooth electrical resistivity survey in another road second
Device 9 is surveyed to be connected with the AD acquisition modules of CPU 11.
Further, the joints of optical fibre 3 are additionally provided between the fiber coupler of tail optical fiber 2 and the 3rd being connected with light source.
Further, it is provided with shielding box outside the fibre optic interferometer.
Further, the CPU is connected with host computer.
Beneficial effect
The invention provides the method for testing and device of a kind of source phase noise, the method is first in fibre optic interferometer
Postpone to set phase-modulator on optical fiber all the way, and to phase-modulator load-modulate signal；Secondly by light signal along optical fiber
Transmit to fibre optic interferometer, the interference signal generated by modulated signal modulation optical fiber interferometer；Finally, generated using phase and carried
The method of ripple demodulation method or working point control is demodulated to the interference signal modulated, and obtains the phase noise letter of light source
Number, realize the measurement of source phase noise.By on the optical fiber of delay all the way of fibre optic interferometer, phase-modulator is set, it is ingenious
Use have short distance difference fibre optic interferometer, synchronously carry out phase-modulation and interference signal collection, according to interference modulating wave
Shape, phase noise is calculated by demodulating algorithm, completes the direct measurement of source phase noise.A kind of source phase of the device is made an uproar
The test device of sound, including tail optical fiber, fibre optic interferometer, the first fiber-optical probe and CPU；Wherein, the optical fiber
Phase-modulator is provided with the optical fiber of delay all the way in interferometer；Abandon in the past conventional ground 50km even longer delay light
Fibre, has selected only 1 meter of short fiber, it is not necessary to high frequency detector and high frequency acquisition system, enormously simplify the structure of system,
Reduce the price of product.
Brief description of the drawings
Fig. 1 is the schematic diagram of embodiment one of the structure of device of the present invention；
Fig. 2 schematic diagram of the embodiment of the structure of device of the present invention two；
Label declaration：1- light sources, 2- tail optical fibers, the 3- joints of optical fibre, the fiber couplers of 4- the 3rd, the optical fiber couplings of 5- the one 1 × 2nd
Clutch, 6- postpones optical fiber, the fiber couplers of 7- the 21 × 2nd, 8- phase-modulators, the photodetectors of 9- second, the light of 10- first
Electric explorer, 11- CPU, 12- host computers, 13- processors, 14-DA output modules, the AD acquisition modules of 15- the,
The AD acquisition modules of 16- the 2nd, 17-2 × 2 fiber coupler, 18- the first optical fiber faraday polariscopes, 19- the second optical fiber faraday
Polariscope, 20- fibre optic interferometers.
Specific embodiment
The present invention is described further below in conjunction with drawings and Examples.
A kind of method of testing of source phase noise, first, phase is set on the optical fiber of delay all the way of fibre optic interferometer
Modulator, and to phase-modulator load-modulate signal；Secondly, by light signal along Optical Fiber Transmission to fibre optic interferometer, pass through
The interference signal of modulated signal modulation optical fiber interferometer generation；Finally, using phase generated carrier demodulation method or operating point
The method of control is demodulated to the interference signal modulated, and obtains the phase noise signal of light source, realizes source phase noise
Measurement.
Light signal is divided into two-way using fiber coupler, a curb optical fiber is transmitted to centre by photodetector
Reason unit carries out light signal strength test, another curb Optical Fiber Transmission to fibre optic interferometer.
A kind of test device of source phase noise, based on above-mentioned method, including tail optical fiber 2, fibre optic interferometer 20, first
Fiber-optical probe 10 and CPU 11；
Wherein, it is provided with phase-modulator 8 on the optical fiber of delay all the way in the fibre optic interferometer；
The tail optical fiber 2 is connected with the signal input part of the fibre optic interferometer；
The signal output part of the fibre optic interferometer gathers mould through the first photodetector 10 with the AD of CPU
Block is connected；
The DA output modules of the CPU are connected with the phase-modulator in fibre optic interferometer.
The schematic diagram of embodiment 1 that Fig. 1 is.The output light of measured light 1 is connected by light source output tail optical fiber 2 by optical fiber
Device 3 is input into the 3rd fiber coupler 4, and two beams are divided into the output light output of measured light 1 to the 3rd fiber coupler 4,
A branch of to be directly entered the first photodetector 9, opto-electronic conversion is electric signal；Another beam is interfered by an optical fiber M-Z for shielding
Enter second photodetector 10 after instrument system 20, opto-electronic conversion is electric signal.
The fibre optic interferometer 20 of shielding includes the one 1 × 2nd fiber coupler 5, delay optical fiber 6, phase-modulator 8 and second
1 × 2 fiber coupler 9 is constituted.It is by 5 points of the one 1 × 2nd fiber coupler from the beam splitting of the 3rd fiber coupler 4 light out
Two beams, a branch of by postponing optical fiber 6, a branch of by phase-modulator 8, two-beam is closed further through the 21 × 2nd fiber coupler 7
The interference light intensity that formed bundled together is exported from the output end of the 21 × 2nd fiber coupler 7.
In order to ensure fibre optic interferometer 20 not by external interference, the one 1 × 2nd fiber coupler 5, delay optical fiber 6, phase are adjusted
The fiber coupler 7 of device processed 8 and the 21 × 2nd is fixed in a shielding box, and the sound and vibration that the shielding box can be to external world are carried out
Isolation, so as to ensure that fibre optic interferometer only measures the phase noise of light source.
CPU 11 includes processor 13, an AD acquisition modules 15 and the 2nd AD acquisition modules 16, DA outputs
Module 14.DA output modules 14 export a modulated signal and are connected to phase-modulator by wire so that Fiber-M-Z interferometer
System can be produced with the consistent phase modulated signal of DA output module output signals；First photodetector 9 and the second photoelectricity
The electric signal of the output of detector 10 is wired to an AD acquisition modules 15 and the 2nd AD acquisition modules 16, and an AD is adopted
The signal that the collection AD acquisition modules 16 of module 15 and the 2nd are collected delivers to processor 13, at 13 pairs of signals of acquisition of processor
Reason, the phase noise signal of light source is demodulated using the method for phase generated carrier demodulation method or working point control, is passed through
Data transfer host computer 12, is shown by host computer.
Fig. 2 is the schematic diagram of embodiment 2.Fibre optic interferometer 20 is by 2 × 2 fiber couplers 17, time delay optical fiber 6, the first optical fiber
Faraday mirror 18, the second optical fiber faraday polariscope 19 and phase-modulator 8 are constituted.Exported from the 3rd fiber coupler 4
Light beam by being divided into two beams after the input injection of 2 × 2 fiber couplers 17, light beam is after time delay optical fiber 6 again through the
The back reflection of one optical fiber faraday polariscope 18 is returned, then through time delay optical fiber 6 returns to 2 × 2 fiber couplers 17；Another Shu Jing
Phase-modulator 8 is returned in the back reflection of the second optical fiber faraday polariscope 19, then phase modulated device 8 returns to 2 × 2 optical fiber couplings
In clutch 17.Return to 2 × 2 fiber couplers 17 two-beam interfere after it is defeated from the output end of 2 × 2 fiber couplers 17
Enter in the second photodetector 10.
In order to completely cut off external vibration and noise, 2 × 2 fiber couplers 17 of fibre optic interferometer 20,6,2 light of time delay optical fiber
Nano farad polariscope and phase-modulator 8 are fixed in a shielding box for shock insulation sound insulation, so as to ensure optical fibre Michelson
Interferometer system only measures the phase noise of light source.
The present invention is using the poor M-Z interferometers of the short distance similar to practical application or Michelson interferometer systems, profit
With phase generated carrier demodulation or working point control demodulating algorithm, it is only necessary to synchronously carry out phase-modulation and interference signal is adopted
Collection, can accurately obtain the phase noise of light source under conditions of interferometer system shielding external environmental interference.The method is utilized
Phase generated carrier demodulation or the method for working point control demodulation, produce phase shift (frequency displacement), directly profit by phase-modulator
With short distance difference fibre optic interferometer, the measurement for achieving that phase noise is demodulated by processor, obtaining will needed for real system
Phase noise level.The method applied in the present invention postpones optical fiber and greatly shortens compared with line width heterodyne measurement method, structure
Complexity reduction, stability is improved, and measurement result can more reflect practical application noise level.
Specific embodiment described herein is only to the spiritual explanation for example of the present invention.Technology neck belonging to of the invention
The technical staff in domain can be made various modifications or supplement to described specific embodiment or be replaced using similar mode
Generation, but without departing from spirit of the invention or surmount scope defined in appended claims.
Claims (9)
1. a kind of method of testing of source phase noise, it is characterised in that first, on the optical fiber of delay all the way of fibre optic interferometer
Phase-modulator is set, and to phase-modulator load-modulate signal；Secondly, by light signal along Optical Fiber Transmission to fiber optic interferometric
Instrument, the interference signal generated by modulated signal modulation optical fiber interferometer；Finally, using phase generated carrier demodulation method or
The method of working point control is demodulated to the interference signal modulated, and obtains the phase noise signal of light source, realizes light source phase
The measurement of position noise.
2. method according to claim 1, it is characterised in that light signal is divided into two-way, using fiber coupler
Curb optical fiber is transmitted to CPU by photodetector and carries out light signal strength test, another curb Optical Fiber Transmission
To fibre optic interferometer.
3. a kind of test device of source phase noise, it is characterised in that based on the method described in claim 1, including tail optical fiber
(2), fibre optic interferometer (20), the first photodetector (10) and CPU (11)；
Wherein, it is provided with phase-modulator (8) on the optical fiber of delay all the way in the fibre optic interferometer；
The tail optical fiber (2) is connected with the signal input part of the fibre optic interferometer；
The signal output part of the fibre optic interferometer is through the first fiber-optical probe (10) and the AD acquisition modules of CPU
It is connected；
The DA output modules of the CPU are connected with the phase-modulator in fibre optic interferometer.
4. device according to claim 3, it is characterised in that the fibre optic interferometer includes the one 1 × 2nd fiber coupler
(5) optical fiber, the 21 × 2nd fiber coupler (7) and phase-modulator (8), are postponed；
Two output ends of the one 1 × 2nd fiber coupler postpone optical fiber and the 21 × 2nd fiber coupler through two-way respectively
(7) input is connected, wherein postponing to be provided with phase-modulator (8) on optical fiber all the way；
The output end of the 21 × 2nd fiber coupler (7) gathers mould through the AD of the first photodetector and CPU
Block is connected.
5. device according to claim 3, it is characterised in that the fibre optic interferometer includes 2 × 2 fiber couplers
(17) optical fiber, the first optical fiber faraday polariscope (18), the second optical fiber faraday polariscope (19) and phase-modulator, are postponed
(8)；
The incoming output end of 2 × 2 fiber coupler (17) signal postpones optical fiber through two-way respectively and the first optical fiber faraday is revolved
Light microscopic (18), the second optical fiber faraday polariscope (19) are connected, wherein postponing to be provided with phase-modulator (8) on optical fiber all the way；
The signal reflex output end of 2 × 2 fiber coupler (17) is connected through the second photodetector with CPU.
6. the device according to claim any one of 3-5, it is characterised in that also including the 3rd fiber coupler (4) and
Two photodetectors (9)；
Light signal is divided into two-way through fiber coupler, is connected with fibre optic interferometer all the way, the photodetector of another road second
(9) the AD acquisition modules with CPU (11) are connected.
7. device according to claim 6, it is characterised in that the tail optical fiber (2) being connected with light source and the 3rd fiber coupler
Between be additionally provided with the joints of optical fibre (3).
8. the device according to claim any one of 3-5, it is characterised in that shielding is provided with outside the fibre optic interferometer
Box.
9. device according to claim 6, it is characterised in that the CPU is connected with host computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611091652.6A CN106768398A (en) | 2016-12-01 | 2016-12-01 | The method of testing and device of a kind of source phase noise |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611091652.6A CN106768398A (en) | 2016-12-01 | 2016-12-01 | The method of testing and device of a kind of source phase noise |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106768398A true CN106768398A (en) | 2017-05-31 |
Family
ID=58913772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611091652.6A Pending CN106768398A (en) | 2016-12-01 | 2016-12-01 | The method of testing and device of a kind of source phase noise |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106768398A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108344515A (en) * | 2018-02-26 | 2018-07-31 | 肖世涛 | A kind of measuring device of twin channel laser phase noise |
| CN108362388A (en) * | 2018-02-26 | 2018-08-03 | 肖世涛 | A kind of measurement method of double passage differential laser phase noise |
| CN109932163A (en) * | 2019-04-11 | 2019-06-25 | 南京聚科光电技术有限公司 | A kind of device and method of noise testing fibre optic interferometer self-assessment |
| CN109946048A (en) * | 2019-04-02 | 2019-06-28 | 南京聚科光电技术有限公司 | A kind of any wavelength laser phase frequency noise-measuring system and method |
| CN109946047A (en) * | 2019-04-02 | 2019-06-28 | 南京聚科光电技术有限公司 | A kind of weak laser signal phase frequency noise characteristic measuring technique |
| CN113804283A (en) * | 2021-09-15 | 2021-12-17 | 中国人民解放军国防科技大学 | System and method for testing phase noise of interference type optical fiber hydrophone |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6616353B1 (en) * | 1999-10-07 | 2003-09-09 | Massachusetts Institute Of Technology | Laser intensity noise suppression using unbalanced interferometer modulation |
| CN103727966A (en) * | 2014-01-22 | 2014-04-16 | 中国人民解放军国防科学技术大学 | Method and device for phase noise suppression of remote optical fiber interference system in spectral line operation |
| CN103837166A (en) * | 2014-03-03 | 2014-06-04 | 中国人民解放军国防科学技术大学 | Method and device for suppressing phase noise of long-distance optical fiber interference system based on optical path difference matching |
-
2016
- 2016-12-01 CN CN201611091652.6A patent/CN106768398A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6616353B1 (en) * | 1999-10-07 | 2003-09-09 | Massachusetts Institute Of Technology | Laser intensity noise suppression using unbalanced interferometer modulation |
| CN103727966A (en) * | 2014-01-22 | 2014-04-16 | 中国人民解放军国防科学技术大学 | Method and device for phase noise suppression of remote optical fiber interference system in spectral line operation |
| CN103837166A (en) * | 2014-03-03 | 2014-06-04 | 中国人民解放军国防科学技术大学 | Method and device for suppressing phase noise of long-distance optical fiber interference system based on optical path difference matching |
Non-Patent Citations (2)
| Title |
|---|
| 王建飞等: "基于法拉第旋镜的干涉型光纤传感器系统偏振相位噪声特性研究", 《物理学报》 * |
| 陈伟等: "远程干涉型光纤传感系统的非线性相位噪声分析", 《物理学报》 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108344515A (en) * | 2018-02-26 | 2018-07-31 | 肖世涛 | A kind of measuring device of twin channel laser phase noise |
| CN108362388A (en) * | 2018-02-26 | 2018-08-03 | 肖世涛 | A kind of measurement method of double passage differential laser phase noise |
| CN108362388B (en) * | 2018-02-26 | 2020-03-20 | 深圳市迅特通信技术有限公司 | Method for measuring phase noise of dual-channel differential laser |
| CN108344515B (en) * | 2018-02-26 | 2020-06-19 | 山东飞天光电科技股份有限公司 | Measuring device for phase noise of dual-channel laser |
| CN109946048A (en) * | 2019-04-02 | 2019-06-28 | 南京聚科光电技术有限公司 | A kind of any wavelength laser phase frequency noise-measuring system and method |
| CN109946047A (en) * | 2019-04-02 | 2019-06-28 | 南京聚科光电技术有限公司 | A kind of weak laser signal phase frequency noise characteristic measuring technique |
| CN109946047B (en) * | 2019-04-02 | 2020-09-08 | 南京聚科光电技术有限公司 | Technology for measuring phase frequency noise characteristics of weak laser signals |
| CN109932163A (en) * | 2019-04-11 | 2019-06-25 | 南京聚科光电技术有限公司 | A kind of device and method of noise testing fibre optic interferometer self-assessment |
| CN113804283A (en) * | 2021-09-15 | 2021-12-17 | 中国人民解放军国防科技大学 | System and method for testing phase noise of interference type optical fiber hydrophone |
| CN113804283B (en) * | 2021-09-15 | 2023-10-20 | 中国人民解放军国防科技大学 | Interference type optical fiber hydrophone phase noise testing system and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106768398A (en) | The method of testing and device of a kind of source phase noise | |
| CN102322880B (en) | Polarization sensitive distributive optical frequency domain reflection disturbance sensor and demodulation method | |
| CN103116055B (en) | A kind of all-fiber current transformator system with temp sensing function | |
| CN101319878B (en) | Method and device for high-precision large-range measuring size of optical fiber | |
| CN102288388B (en) | Device and method for improving polarization-maintaining optical fiber polarization coupling measurement precision and symmetry | |
| CN102607621A (en) | Distributed optical fiber Brillouin sensing device and method thereof for detecting temperature and strain synchronously | |
| CN103591971B (en) | A kind of localization method of fiber grating | |
| CN102538845B (en) | Multi-point disturbance location method | |
| CN101625279B (en) | Device for positioning optical fiber breakpoints and method for confirming breakpoint positions | |
| CN101441092A (en) | Perimeter protection sensing positioning system based on coherent light time domain reflection | |
| CN111982000B (en) | Optical fiber shape reconstruction method and device based on Beta frame | |
| CN103743553A (en) | Double-channel optical performance testing device of integrated waveguide modulator and polarization crosstalk identification and processing method thereof | |
| CN103090813A (en) | High resolution sensing system measuring beat-length and strain of polarization maintaining optical fiber based on optical frequency domain reflectometer (OFDR) system | |
| CN104180831A (en) | Sensitivity-enhanced optical time domain reflection distributed Michelson interferometer based on two-core optical fiber | |
| CN102680138B (en) | Double-direction four-channel coupled distribution-type optical-fiber Raman temperature measuring system | |
| CN102313141A (en) | Optical fiber vibration sensing system for pipeline leakage detection | |
| CN101324446B (en) | Destabilization sensing localization method | |
| CN107314823B (en) | The Method for Phase Difference Measurement and device of interferometric optical fiber sensor | |
| CN101458100A (en) | Demodulation system of FBG sensor and demodulation method thereof | |
| CN110332951A (en) | The device and method of distal sensor is realized in a kind of optical frequency domain reflection technology | |
| CN106840486B (en) | Full distributed Dedenda's bending stress device for dynamically detecting and method | |
| CN208672199U (en) | A kind of device for realizing distributed strain sensing using probe beam deflation | |
| CN202631155U (en) | Double-way four-channel coupler distributed optical fiber Raman temperature measurement system | |
| CN102496231B (en) | Long-distance trunk line safety fiber wavelength division multiplexing type warning system | |
| CN202420557U (en) | Sensing device utilizing Brillouin optical time-domain analysis and Mach-Zehnder interference to carry out common detection |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170531 |