CN208141072U - A kind of control optical phase modulator based on Michelson's interferometer - Google Patents
A kind of control optical phase modulator based on Michelson's interferometer Download PDFInfo
- Publication number
- CN208141072U CN208141072U CN201721907039.7U CN201721907039U CN208141072U CN 208141072 U CN208141072 U CN 208141072U CN 201721907039 U CN201721907039 U CN 201721907039U CN 208141072 U CN208141072 U CN 208141072U
- Authority
- CN
- China
- Prior art keywords
- phase
- modulator
- optical fiber
- optical
- interferometer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
A kind of control optical phase modulator based on Michelson's interferometer, including laser, coupler, phase-modulator, first faraday mirror, second faraday mirror, photodetector and central controller, the laser connects coupler, the coupler passes through long-armed optical fiber respectively, galianconism optical fiber is correspondingly connected with the first faraday mirror, second faraday mirror, phase-modulator is provided on the galianconism optical fiber or/and long-armed optical fiber, the interference output end of the coupler connects photodetector, the central controller respectively with phase-modulator, photodetector connection.The phase-modulator of the utility model, it is accurate control optical phase modulator can quickly, accurately control optical phase, be adapted in various optical measuring systems.According to the needs of optical system, optical phase control in the phase that any one is needed, the variation of optical phase caused by environmental disturbances is compensated, the accuracy and speed of optical fiber measurement equipment is improved.
Description
Technical field
The present invention relates to safety communication technology field, in particular to a kind of control optics phase based on Michelson's interferometer
Position modulator.
Background technique
Michelson fiber-optic interferometer has the characteristics that temperature, vibration sensing, generates 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.
Optical fiber is very sensitive for vibration and temperature, so optical fiber measurement technology is widely applied to vibration and temperature etc. is smart
Among close measurement.Vibration and temperature will affect the variation of the light phase in optical fiber, and the phase change by measuring light can be accurate
Measurement vibration and temperature.But the interference due to optical fiber vulnerable to environment changes optical phase.So in optical fiber measurement equipment
It is accurately controlled optical phase, the variation of optical phase caused by environmental disturbances is compensated.
Summary of the invention
It is an object of that present invention to provide a kind of control optical phase modulator based on Michelson's interferometer, with accurate
Optical phase is controlled, the variation of optical phase caused by environmental disturbances is compensated, while improving the essence of optical fiber measurement equipment
Degree and speed.
The technical proposal of the invention is realized in this way：
A kind of control optical phase modulator based on Michelson's interferometer, including laser, coupler, phase-modulation
Device, the first faraday mirror, the second faraday mirror, photodetector and central controller, the laser connect coupler, institute
State that coupler passes through long-armed optical fiber respectively, galianconism optical fiber is correspondingly connected with the first faraday mirror, the second faraday mirror, the galianconism light
Be provided with phase-modulator on fine or/and long-armed optical fiber, the interference output end of the coupler connects photodetector, it is described in
Centre controller is connect with phase-modulator, photodetector respectively.
Preferably, adjustable attenuator is provided on the galianconism optical fiber.
Preferably, the phase-modulator uses piezoelectric ceramic phase.
Preferably, the central controller uses stm32 single-chip microcontroller.
Compared with prior art, the invention has the following beneficial effects：
Control optical phase modulator based on Michelson's interferometer of the invention, accurately controls optical phase modulator
Can quickly, accurately control optical phase, be adapted in various optical measuring systems.According to the needs of optical system,
Optical phase control in the phase that any one is needed, the variation of optical phase caused by environmental disturbances is compensated,
Improve the accuracy and speed of optical fiber measurement equipment.
Detailed description of the invention
Fig. 1 is the functional block diagram of the control optical phase modulator the present invention is based on Michelson's interferometer；
Fig. 2 is the outline drawing of piezoelectric ceramic phase in the present invention.
In figure：Laser 100, coupler 200, phase-modulator 300, the first faraday mirror 400, the second faraday mirror
500, photodetector 600 and central controller 700, long-armed optical fiber 800, galianconism optical fiber 900, adjustable attenuator 901.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and the present invention is clearly and completely described.
As shown in Figure 1, a kind of control optical phase modulator based on Michelson's interferometer, including laser 100, coupling
Clutch 200, phase-modulator 300, the first faraday mirror 400, the second faraday mirror 500, photodetector 600 and center control
Device 700 processed, the coupler 200 use 3db coupler, and the photodetector 600 is for detecting light intensity signal, and handle
Light intensity signal is converted to voltage signal, and the laser 100 connects coupler 200, and the coupler 200 is respectively by long-armed
Optical fiber 800, galianconism optical fiber 900 are correspondingly connected with the first faraday mirror 400, the second faraday mirror 500, the galianconism optical fiber 900 or/
Be provided with phase-modulator 300 on long-armed optical fiber 800, the interference output end of the coupler 200 connects photodetection 600
Device, the central controller 700 are connect with phase-modulator 300, photodetector 600 respectively.It is set on the galianconism optical fiber 900
Be equipped with adjustable attenuator 901, the adjustable attenuator 901 can will by the attenuated optical signal in galianconism optical fiber 900 to it is long-armed
It is consistent in optical fiber 800, it can reduce to the low-loss requirement of time delay optical fiber.The phase-modulator 300 uses piezoelectric ceramics phase
Position modulator.The central controller 700 uses stm32 single-chip microcontroller.
The coupler 200, phase-modulator 300, the first faraday mirror 400, the second faraday mirror 500 and galianconism light
Fibre 900 and long-armed optical fiber 800 constitute a kind of Michelson's interferometer, and laser 100 issues laser, by 3db coupler point
It is respectively enterd in the two-arm of interferometer for the equal laser of two beam powers, wherein light passes through farad by optical fiber extended line again all the way
Mirror is reflected back 3db coupler, and another way light is reflected back 3db coupler using faraday mirror by phase-modulator 300.Two
Road light forms interference by 3db coupler, and photodetector 600 detects interference of light intensity, and is converted to voltage signal and passes to
Stm32 single-chip microcontroller.The phase of Michelson's interferometer has corresponded to different interference light intensities, so the interference light obtained by measurement
By force, the phase state of interferometer can be determined.According to These characteristics, interference light intensity is analyzed using stm32 single-chip microcontroller, is come
It determines phase size, then piezoelectric ceramic phase, Ke Yijing is accurately controlled by the pid algorithm in stm32 single-chip microcontroller
True is modulated to required optical phase.
The PID specific algorithm is as follows：
PID=Uk+KP* [E (k)-E (k-1)]+KI*E (k)+KD* [E (k) -2E (k-1)+E (k-2)]；
Wherein PID is to need voltage to be achieved；Uk is last time output voltage；KP, KI, KD are self feed back control coefrficient；E
It (k) is deviation after this is sampled, E (k-1) is deviation after last sampling, and E (k-2) is deviation after upper double sampling.Luminous intensity
Signal is converted to voltage signal by photodetector, so voltage signal and light intensity signal one-to-one relationship.
Pid algorithm is carried out automatically controlling by way of the ratio of deviation, integral, differential, can fast and accurately be made
Controlled variable reaches required target call.Pid algorithm analyzes the voltage signal collected, then exports one
It controls voltage in piezoelectric ceramic phase, voltage changes optical phase variation, and interference strength signal is also with optics phase
Position variation and change.Change optical phase by the operation of PID, interference light intensity is made to reach the target of setting.
Piezoelectric ceramic phase is made of annulated column type piezoelectric ceramics and bare fibre.As shown in Fig. 2, piezoelectric ceramics is ring
Column type, inner and outer wall add positive voltage and negative voltage respectively.Piezoelectric ceramics can be along radial expansion after being powered.Bare fibre is close
The outer wall for being wrapped in piezoelectric ceramics, drive optical fiber flexible while piezoelectric ceramics is flexible, change optical phase.Outside piezoelectric ceramics
Making alive is controlled by single-chip microcontroller stm32.
Control optical phase modulator based on Michelson's interferometer of the invention, accurately controls optical phase modulator
Can quickly, accurately control optical phase, be adapted in various optical measuring systems.According to the needs of optical system,
Optical phase control in the phase that any one is needed, the variation of optical phase caused by environmental disturbances is compensated,
Improve the accuracy and speed of optical fiber measurement equipment.
Claims (4)
1. a kind of control optical phase modulator based on Michelson's interferometer, which is characterized in that including laser, coupling
Device, phase-modulator, the first faraday mirror, the second faraday mirror, photodetector and central controller, the laser connect
Coupler is connect, the coupler passes through long-armed optical fiber respectively, galianconism optical fiber is correspondingly connected with the first faraday mirror, the second faraday
Mirror, phase-modulator is provided on the galianconism optical fiber or/and long-armed optical fiber, and the interference output end of the coupler connects photoelectricity
Detector, the central controller are connect with phase-modulator, photodetector respectively.
2. the control optical phase modulator based on Michelson's interferometer as described in claim 1, which is characterized in that described
Adjustable attenuator is provided on galianconism optical fiber.
3. the control optical phase modulator based on Michelson's interferometer as claimed in claim 2, which is characterized in that described
Phase-modulator uses piezoelectric ceramic phase.
4. the control optical phase modulator based on Michelson's interferometer as claimed in claim 2, which is characterized in that described
Central controller uses stm32 single-chip microcontroller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721907039.7U CN208141072U (en) | 2017-12-29 | 2017-12-29 | A kind of control optical phase modulator based on Michelson's interferometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721907039.7U CN208141072U (en) | 2017-12-29 | 2017-12-29 | A kind of control optical phase modulator based on Michelson's interferometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208141072U true CN208141072U (en) | 2018-11-23 |
Family
ID=64284008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721907039.7U Active CN208141072U (en) | 2017-12-29 | 2017-12-29 | A kind of control optical phase modulator based on Michelson's interferometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208141072U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110108346A (en) * | 2019-04-22 | 2019-08-09 | 中国科学院上海光学精密机械研究所 | Optical fibre vibration sensor based on delay phase modulation chirped pulse pair |
| CN112799175A (en) * | 2021-04-14 | 2021-05-14 | 国开启科量子技术(北京)有限公司 | Optical fiber interference device and quantum communication equipment |
-
2017
- 2017-12-29 CN CN201721907039.7U patent/CN208141072U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110108346A (en) * | 2019-04-22 | 2019-08-09 | 中国科学院上海光学精密机械研究所 | Optical fibre vibration sensor based on delay phase modulation chirped pulse pair |
| CN110108346B (en) * | 2019-04-22 | 2021-05-04 | 中国科学院上海光学精密机械研究所 | Optical fiber vibration sensor based on delay phase modulation chirp pulse pair |
| CN112799175A (en) * | 2021-04-14 | 2021-05-14 | 国开启科量子技术(北京)有限公司 | Optical fiber interference device and quantum communication equipment |
| CN112799175B (en) * | 2021-04-14 | 2021-07-02 | 国开启科量子技术(北京)有限公司 | Optical fiber interference device and quantum communication equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208141072U (en) | A kind of control optical phase modulator based on Michelson's interferometer | |
| CN102607551B (en) | Fiber optic gyroscope capable of eliminating influence of wavelength change to scale factor | |
| CN102722204B (en) | Control device of bias voltage of electro-optical intensity modulator and control method thereof | |
| CN104713539B (en) | A kind of long control system of laser gyro cavity and control method | |
| CN103162724A (en) | Optical fiber grating sensor demodulation instrument and method based on dynamic scanning | |
| CN105806468A (en) | Fiber bragg grating vibration sensor and detection device thereof | |
| US20130148691A1 (en) | Distributed optical fiber temperature sensor based on optical fiber delay | |
| Shan et al. | Differential reflective fiber-optic angular displacement sensor | |
| US9720300B2 (en) | Dual-tap electro-optic modulator auto-bias control | |
| CN105547336A (en) | Fiber grating sensing demodulation device and method on the basis of photoelectric oscillation loop | |
| CN105044568B (en) | The fiber ultrasonic detecting system and detection method of self-adaptation type partial discharge of transformer | |
| GB2276449A (en) | Interferometer strain sensor | |
| CN103344607B (en) | Optical maser wavelength detection control apparatus and control method thereof in TDLAS | |
| CN101350674A (en) | Method and apparatus for adjusting phase as well as light modulator | |
| CN105466410B (en) | The adjustable interference type optical fiber gyroscope of sensitivity based on fiber annular resonant cavity | |
| CN104359491A (en) | Light source screening and testing device | |
| CN110186500B (en) | Unbalanced optical fiber interferometer arm length difference measuring device and method adopting absolute method | |
| CN108955970B (en) | Micro-stress sensor for bridge monitoring | |
| CN107014412A (en) | A kind of fiber-sensing measuring method and device of dual interferometer matching demodulation | |
| CN104215319B (en) | Dynamic range adjustable differential interferometer and measuring method | |
| CN107014518B (en) | A kind of optical fiber temperature sensing device | |
| CN105588587A (en) | Automatic level control-based spontaneous Brillouin scattering signal extraction device and method | |
| CN202693613U (en) | Closed-loop control interference type optical fiber accelerometer | |
| CN103196472A (en) | Demodulation instrument and demodulation method of fiber grating dynamic strain based on random unequal interval sampling | |
| CN210323604U (en) | Single-axis Sagnac interferometer phase offset control device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |