CN107255440A - A kind of signal contrast formula laser phase self feed back interferometer and self feed back interference technique - Google Patents
A kind of signal contrast formula laser phase self feed back interferometer and self feed back interference technique Download PDFInfo
- Publication number
- CN107255440A CN107255440A CN201710629275.5A CN201710629275A CN107255440A CN 107255440 A CN107255440 A CN 107255440A CN 201710629275 A CN201710629275 A CN 201710629275A CN 107255440 A CN107255440 A CN 107255440A
- Authority
- CN
- China
- Prior art keywords
- phase
- feed back
- interferometer
- self feed
- photodetector
- 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
- 238000000034 method Methods 0.000 title claims description 16
- 239000013307 optical fiber Substances 0.000 claims abstract description 37
- 239000000835 fiber Substances 0.000 claims abstract description 29
- 230000003287 optical effect Effects 0.000 claims abstract description 12
- 230000002238 attenuated effect Effects 0.000 claims description 4
- 230000033228 biological regulation Effects 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 230000005622 photoelectricity Effects 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims 2
- 238000010168 coupling process Methods 0.000 claims 2
- 238000005859 coupling reaction Methods 0.000 claims 2
- 238000005070 sampling Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229940085805 fiberall Drugs 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B9/00—Measuring instruments characterised by the use of optical techniques
- G01B9/02—Interferometers
- G01B9/02015—Interferometers characterised by the beam path configuration
- G01B9/02027—Two or more interferometric channels or interferometers
- G01B9/02028—Two or more reference or object arms in one interferometer
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/353—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
- G01D5/35306—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using an interferometer arrangement
- G01D5/35325—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using an interferometer arrangement using interferometer with two arms in reflection, e.g. Mickelson interferometer
Abstract
A kind of signal contrast formula laser phase self feed back interferometer, interferometer includes fiber coupler, fiber coupler passes through galianconism optical fiber respectively, long-armed optical fiber is respectively connected with faraday mirror, phase-modulator is provided with galianconism optical fiber or/and long-armed optical fiber, continuous light laser connects fiber coupler by circulator, the interference output end of fiber coupler connects the first photodetector by circulator all the way, the second photodetector is directly connected to all the way, second photodetector connects phase-modulator by self feed back controller, first photodetector and the second photodetector are all connected with interference signal comparator.Then the present invention can more be accurately controlled the optical phase of interferometer by PID preliminary control interferometer phase by the contrast of two-way interference signal and the control of self feed back controller, coordinate PID controller more accurately to control interferometer phase；Effectively reduce environment is influenceed on interferometer phase, and phase that can be accurately to interferometer is controlled.
Description
Technical field
The present invention relates to safety communication technology field, more particularly to a kind of signal contrast formula laser phase self feed back interferometer
And self feed back interference technique.
Background technology
The features such as Michelson fiber-optic interferometer has to temperature, vibration sensing, generation quantum phase noise.More than being based on
The characteristics of Michelson's interferometer be widely used in terms of temperature, vibration, imaging, in terms of quantum communications.
Self feed back control system is needed to use to make interferometer stable in pi/2 phase when using Michelson's interferometer.Pass
The method of system is using PID self feed backs controller that optical phase is stable at pi/2.Signal is acquired again.This method
Defect be to be influenceed by external environmental factor, stable precision is not high enough, it is impossible to effective to determine external environment condition to interferometer
Influence so that the phase of interferometer is accurately controlled.
The content of the invention
Present invention aims at provide a kind of signal contrast formula laser phase self feed back interferometer and self feed back interference side
Method is stable optical phase using PID self feed backs controller to solve during Michelson's interferometer phase-modulation in the prior art
At pi/2, then the mode being acquired on signal is influenceed larger by external environmental factor, and stable precision is not high enough, no
The technical bug that phase that can be effectively to interferometer is accurately controlled.
The technical proposal of the invention is realized in this way：
A kind of signal contrast formula laser phase self feed back interferometer, including continuous light laser, circulator, interferometer,
One photodetector, the second photodetector, self feed back controller and interference signal comparator, the interferometer include optical fiber
Coupler, the fiber coupler are respectively connected with faraday mirror, the galianconism optical fiber by galianconism optical fiber, long-armed optical fiber respectively
Or/and phase-modulator is provided with long-armed optical fiber, the continuous light laser connects fiber coupler by circulator, described
The interference output end of fiber coupler connects the first photodetector by circulator all the way, and the spy of the second photoelectricity is directly connected to all the way
Device is surveyed, second photodetector connects phase-modulator, first photodetector and the by self feed back controller
Two photodetectors are all connected with interference signal comparator.
Preferably, it is provided with adjustable attenuator on the galianconism optical fiber.
Preferably, the self feed back controller uses PID controller.
A kind of signal contrast formula phase self feed back interference technique, comprises the following steps：
1) continuous light laser sends continuous signal light, enters fiber coupler by circulator, light is in coupler
It is equally divided into two-way light and respectively enters two arms of interferometer；
2) after first via light is by long-armed optical fiber, then process faraday mirror is reflected back fiber coupler, and another road light passes through
Phase-modulator, reaches faraday mirror back reflection back into optical fibers coupler；
3) two paths of signals light is back to formation two-way interference signal after fiber coupler, wherein interference signal is by optical fiber all the way
Coupler enters the second photodetector, is controlled analysis in feedback controller, and send instruction regulation phase-modulator
Adjust optical phase；
4) another road interference signal is passed through by being detected after circulator by the first photodetector with upper interference signal all the way
Interference signal comparator is contrasted, and determines the phase position residing for the interference signal, and send control instruction to self feed back
Controller, to adjust phase-modulator；
5) phase-modulator adjusts phase difference needed for two interference signals, you can the flashlight after stable output interference.
Preferably, flashlight pass through galianconism optical fiber when by adjustable attenuator by attenuated optical signal to it is long-armed in one
Cause.
Compared with prior art, the present invention has following beneficial effect：
The signal contrast formula laser phase self feed back interferometer and self feed back interference technique of the present invention, passes through the first of PID
Step control interferometer phase, then the contrast by two-way interference signal and the control of self feed back controller can be more accurate
The optical phase of interferometer is controlled, coordinates PID controller more accurately to control interferometer phase；Effectively reduce environment
Interferometer phase is influenceed, phase that can be accurately to interferometer is controlled.
Brief description of the drawings
Fig. 1 is the theory diagram of signal contrast formula laser phase self feed back interferometer of the present invention.
In figure：Continuous light laser 100, circulator 200, interferometer 300, fiber coupler 301, galianconism optical fiber 302, length
Arm optical fiber 303, faraday mirror 304, phase-modulator 305, adjustable attenuator 306, the first photodetector 400, the second photoelectricity
Detector 500, self feed back controller 600, interference signal comparator 700.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the present invention is clearly and completely described.
As shown in figure 1, a kind of signal contrast formula laser phase self feed back interferometer, including continuous light laser 100, annular
Device 200, interferometer 300, the first photodetector 400, the second photodetector 500, self feed back controller 600 and interference letter
Number comparator 700, the interferometer 300 is Michelson's interferometer, and it includes fiber coupler 301, the fiber coupler
301 are respectively connected with faraday mirror 304, the galianconism optical fiber 302 or/and length by galianconism optical fiber 302, long-armed optical fiber 303 respectively
Phase-modulator 305 is provided with arm optical fiber 303, the continuous light laser 100 connects fiber coupler by circulator 200
302, the interference output end of the fiber coupler 301 connects the first photodetector 400 by circulator 300 all the way, all the way
The second photodetector 500 is directly connected to, second photodetector 500 connects phase by self feed back controller 600 and adjusted
Device 306 processed, the photodetector 500 of the first photodetector 400 and second is all connected with interference signal comparator 700, described
Interference signal comparator 700 can be realized using host computers such as PCs.
Fiber coupler 301 and faraday mirror 304 constitute Michelson's interferometer, two brachiums of interferometer 300 not phase
Deng continuous light laser 100 sends laser, is entered by circulator 200 in fiber coupler 301, in fiber coupler 301
According to 50:50 coupled ratio is divided into two-way laser, and this two-way laser passes through galianconism optical fiber 302 or long-armed optical fiber 303 respectively
Faraday mirror 304 afterwards is reflected, and interference is formed in fiber coupler 301.Interference signal is divided into two-way, all the way by ring
Shape device 200 enters the first photodetector 400, is directly accessed the second photodetector 500 all the way in addition.Secondary two-way interference letter
Number, it can be indicated with formula below；
Wherein, P is interference signal power.
From formula it can be seen that interference output is influenceed by phase, and phase is influenceed by environment temperature and vibration,
So environment temperature and vibration influence whether interference signal.Under natural environment, interference signal can be shaken and drift about, unfavorable
In the extraction of metrical information.So to accomplish to be incubated shock insulation in configuration aspects, reduction environment temperature and vibration to interference as far as possible
The influence of instrument.
Interferometer in the present invention makes shell with thermal insulation separation blanket, and its temperature being subject to can be reduced to a certain extent
With the interference of vibration, phase-modulator is added on an arm, self feed back controller is collectively formed with PID controller, photodetector,
It is pi/2 to ensure two-arm phase difference.For the lasting accuracy of phase, using the physical characteristic of interferometer, two-way interference signal is contrasted
Power determine the phase position of interferometer, improve the precision of phase stabilization.By formula when two-way interferes power identical,
It is pi/2 that phase, which can be proved,.
Adjustable attenuator 306 is provided with the galianconism optical fiber 302, the adjustable attenuator 306 will can pass through in galianconism
Attenuated optical signal to it is long-armed in it is consistent, it is possible to decrease it is low-loss to time delay optical fiber require.
The self feed back controller 600 uses PID controller, and self feed back control algolithm is as follows：
PID=Uk+KP* [E (k)-E (k-1)]+KI*E (k)+KD* [E (k) -2E (k-1)+E (k-2)]；
Wherein Uk is last time output voltage；KP, KI, KD are self feed back control coefrficient；E (k) is deviation, E after this sampling
(k-1) it is deviation after last sampling, E (k-2) is deviation after upper double sampling.
By self feed back control algolithm can high speed the stability for being accurately controlled interferometer.
Present invention also offers a kind of signal contrast formula phase self feed back interference technique, comprise the following steps：
1) continuous light laser sends continuous signal light, enters fiber coupler by circulator, light is in coupler
It is equally divided into two-way light and respectively enters two arms of interferometer；
2) after first via light is by long-armed optical fiber, then process faraday mirror is reflected back fiber coupler, and another road light passes through
Phase-modulator, reaches faraday mirror back reflection back into optical fibers coupler；
3) two paths of signals light is back to formation two-way interference signal after fiber coupler, wherein interference signal is by optical fiber all the way
Coupler enters the second photodetector, is controlled analysis in feedback controller, and send instruction regulation phase-modulator
Adjust optical phase；
4) another road interference signal is passed through by being detected after circulator by the first photodetector with upper interference signal all the way
Interference signal comparator is contrasted, and determines the phase position residing for the interference signal, and send control instruction to self feed back
Controller, to adjust phase-modulator；
5) phase-modulator adjusts phase difference needed for two interference signals, you can the flashlight after stable output interference.
In the above-mentioned methods, flashlight pass through galianconism optical fiber when by adjustable attenuator by attenuated optical signal to it is long-armed in
It is consistent.
The signal contrast formula laser phase self feed back interferometer and self feed back interference technique of the present invention, passes through the first of PID
Step control interferometer phase, then the contrast by two-way interference signal and the control of self feed back controller can be more accurate
The optical phase of interferometer is controlled, coordinates PID controller more accurately to control interferometer phase；Effectively reduce environment
Interferometer phase is influenceed, phase that can be accurately to interferometer is controlled.
Claims (5)
1. a kind of signal contrast formula laser phase self feed back interferometer, it is characterised in that including continuous light laser, circulator,
Interferometer, the first photodetector, the second photodetector, self feed back controller and interference signal comparator, the interference
Instrument is respectively connected with faraday mirror by galianconism optical fiber, long-armed optical fiber respectively including fiber coupler, the fiber coupler, described
Phase-modulator is provided with galianconism optical fiber or/and long-armed optical fiber, the continuous light laser connects optical fiber coupling by circulator
Clutch, the interference output end of the fiber coupler connects the first photodetector by circulator all the way, is directly connected to all the way
Second photodetector, second photodetector connects phase-modulator, first photoelectricity by self feed back controller
Detector and the second photodetector are all connected with interference signal comparator.
2. signal contrast formula laser phase self feed back interferometer as claimed in claim 1, it is characterised in that the galianconism optical fiber
On be provided with adjustable attenuator.
3. signal contrast formula laser phase self feed back interferometer as claimed in claim 2, it is characterised in that the self feed back control
Device processed uses PID controller.
4. a kind of signal contrast formula phase self feed back interference technique based on any one of claim 1-3, it is characterised in that bag
Include following steps：
1) continuous light laser sends continuous signal light, and fiber coupler is entered by circulator, and light is average in coupler
It is divided into two-way light and respectively enters two arms of interferometer；
2) after first via light is by long-armed optical fiber, then process faraday mirror is reflected back fiber coupler, and another road light passes through phase
Modulator, reaches faraday mirror back reflection back into optical fibers coupler；
3) two paths of signals light is back to formation two-way interference signal after fiber coupler, wherein interference signal is by fiber coupling all the way
Device enters the second photodetector, is controlled analysis in feedback controller, and send instruction regulation phase-modulator to adjust
Optical phase；
4) another road interference signal passes through interference by being detected after circulator by the first photodetector with upper interference signal all the way
Signal comparator is contrasted, and determines the phase position residing for the interference signal, and send control instruction to give self feed back control
Device, to adjust phase-modulator；
5) phase-modulator adjusts phase difference needed for two interference signals, you can the flashlight after stable output interference.
5. signal contrast formula phase self feed back interference technique as claimed in claim 4, it is characterised in that flashlight passes through galianconism
During optical fiber by adjustable attenuator by attenuated optical signal to it is long-armed in it is consistent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710629275.5A CN107255440A (en) | 2017-07-28 | 2017-07-28 | A kind of signal contrast formula laser phase self feed back interferometer and self feed back interference technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710629275.5A CN107255440A (en) | 2017-07-28 | 2017-07-28 | A kind of signal contrast formula laser phase self feed back interferometer and self feed back interference technique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107255440A true CN107255440A (en) | 2017-10-17 |
Family
ID=60025724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710629275.5A Pending CN107255440A (en) | 2017-07-28 | 2017-07-28 | A kind of signal contrast formula laser phase self feed back interferometer and self feed back interference technique |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107255440A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108007307A (en) * | 2017-11-20 | 2018-05-08 | 长沙湘计海盾科技有限公司 | The measuring method and measuring device of a kind of optical fiber |
| CN109884655A (en) * | 2019-03-21 | 2019-06-14 | 西南大学 | Light based on light Semiconductor Lasers carries FM-CW laser ranging system |
| CN110056784A (en) * | 2019-05-24 | 2019-07-26 | 昆仑杰信（北京）科技有限责任公司 | A kind of round-the-clock leakage monitoring of compressed gas and instant alarming photoelectric detecting system |
| CN110492933A (en) * | 2019-09-24 | 2019-11-22 | 安徽问天量子科技股份有限公司 | The four phase voltage device for accurately measuring and measurement method of unequal arm interferometer |
| CN110608761A (en) * | 2019-10-30 | 2019-12-24 | 珠海任驰光电科技有限公司 | Optical fiber interference device and method capable of eliminating associated amplitude modulation |
| WO2020078169A1 (en) * | 2018-10-17 | 2020-04-23 | 科大国盾量子技术股份有限公司 | Phase modulation-based qkd polarization state preparation apparatus and method |
| CN115955280A (en) * | 2023-03-13 | 2023-04-11 | 万事通科技(杭州)有限公司 | Optical fiber channel eavesdropping detection device |
| CN110608761B (en) * | 2019-10-30 | 2024-05-14 | 珠海任驰光电科技有限公司 | Optical fiber interference device and method capable of eliminating associated amplitude modulation |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102564318A (en) * | 2011-12-23 | 2012-07-11 | 北京交通大学 | High precision absolute displacement measurement system based on optical fiber composite interference |
| CN206974367U (en) * | 2017-07-28 | 2018-02-06 | 浙江九州量子信息技术股份有限公司 | A kind of signal contrast formula laser phase self feed back interferometer |
-
2017
- 2017-07-28 CN CN201710629275.5A patent/CN107255440A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102564318A (en) * | 2011-12-23 | 2012-07-11 | 北京交通大学 | High precision absolute displacement measurement system based on optical fiber composite interference |
| CN206974367U (en) * | 2017-07-28 | 2018-02-06 | 浙江九州量子信息技术股份有限公司 | A kind of signal contrast formula laser phase self feed back interferometer |
Non-Patent Citations (1)
| Title |
|---|
| 王玲玲 等: "《控制系统仿真与实践案例式教程》", 北京航空航天大学出版社, pages: 13 - 14 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108007307A (en) * | 2017-11-20 | 2018-05-08 | 长沙湘计海盾科技有限公司 | The measuring method and measuring device of a kind of optical fiber |
| CN108007307B (en) * | 2017-11-20 | 2024-03-29 | 湖南长城海盾光纤科技有限公司 | Optical fiber measuring method and measuring device |
| WO2020078169A1 (en) * | 2018-10-17 | 2020-04-23 | 科大国盾量子技术股份有限公司 | Phase modulation-based qkd polarization state preparation apparatus and method |
| CN109884655A (en) * | 2019-03-21 | 2019-06-14 | 西南大学 | Light based on light Semiconductor Lasers carries FM-CW laser ranging system |
| CN110056784A (en) * | 2019-05-24 | 2019-07-26 | 昆仑杰信（北京）科技有限责任公司 | A kind of round-the-clock leakage monitoring of compressed gas and instant alarming photoelectric detecting system |
| CN110492933A (en) * | 2019-09-24 | 2019-11-22 | 安徽问天量子科技股份有限公司 | The four phase voltage device for accurately measuring and measurement method of unequal arm interferometer |
| CN110492933B (en) * | 2019-09-24 | 2022-09-02 | 安徽问天量子科技股份有限公司 | Measuring method of four-phase voltage accurate measuring device of unequal-arm interferometer |
| CN110608761A (en) * | 2019-10-30 | 2019-12-24 | 珠海任驰光电科技有限公司 | Optical fiber interference device and method capable of eliminating associated amplitude modulation |
| CN110608761B (en) * | 2019-10-30 | 2024-05-14 | 珠海任驰光电科技有限公司 | Optical fiber interference device and method capable of eliminating associated amplitude modulation |
| CN115955280A (en) * | 2023-03-13 | 2023-04-11 | 万事通科技(杭州)有限公司 | Optical fiber channel eavesdropping detection device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107255440A (en) | A kind of signal contrast formula laser phase self feed back interferometer and self feed back interference technique | |
| CA3054460A1 (en) | Integrated optic wavemeter and method for fiber optic gyroscopes scale factor stabilization | |
| CN102095419A (en) | Method for modeling and error compensation of temperature drift of fiber optic gyroscope | |
| CN104236537A (en) | Light source intensity noise suppression digital double closed-loop method based on intensity modulator | |
| US10330697B2 (en) | Active, in-situ, calibration of MEMS accelerometers using optical forces | |
| CN101858822A (en) | He-Ne laser frequency stability measuring system and measuring method thereof | |
| CN107728134A (en) | The FM-CW laser ranging device of integrated reference path systems stabilisation | |
| CN103389084A (en) | Double-coupling optical fiber ring resonator coherent effect-based resonant fiber optic gyroscope | |
| CN105806468A (en) | Fiber bragg grating vibration sensor and detection device thereof | |
| Shan et al. | Differential reflective fiber-optic angular displacement sensor | |
| CN101750058A (en) | Optical fiber gyroscope with centre wavelength monitoring and regulating function | |
| CN104406682B (en) | A kind of pair of interference signal correlation adjusting method of Mach Zehnder fiber optic interferometric systems | |
| CN206974367U (en) | A kind of signal contrast formula laser phase self feed back interferometer | |
| CN111462707B (en) | Modeling compensation-based temperature drift suppression method for liquid crystal power stabilizing system | |
| CN109579820B (en) | Method for improving scale factor performance of optical fiber gyroscope | |
| CN110285843A (en) | A kind of large amplitude signal distributions formula dim light grid array sensor-based system and demodulation method | |
| CN101738167A (en) | Resonant cavity frequency stabilization-based absolute distance measurement system and implementing method thereof | |
| CN104457732A (en) | Method for quickly starting optical fiber gyroscope | |
| CN109579821B (en) | Optical fiber gyroscope based on dual-wavelength multiplexing structure | |
| CN100561129C (en) | The erasure signal Strength Changes is to the method for fiber optic gyroscope performance influence | |
| CN105466410A (en) | Sensitivity-tunable interferometric fiber optic gyroscope based on fiber ring resonator | |
| KR102141705B1 (en) | Optical phase detector based sensing system independent on optical pulse power | |
| CN103970165B (en) | For the control method that double-wave-length orthogonal polarization light polarization stability controls | |
| CN107490395A (en) | A kind of chamber grows controllable optical fiber Fabry Perot chamber constructive methods | |
| CN110987010B (en) | Signal interference detection method, computer storage medium and computer equipment |
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 |