CN206002195U - It is applied to the polarized controller of distributed optical fiber vibration sensing system - Google Patents
It is applied to the polarized controller of distributed optical fiber vibration sensing system Download PDFInfo
- Publication number
- CN206002195U CN206002195U CN201620912567.0U CN201620912567U CN206002195U CN 206002195 U CN206002195 U CN 206002195U CN 201620912567 U CN201620912567 U CN 201620912567U CN 206002195 U CN206002195 U CN 206002195U
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- photodetector
- controller
- phase
- circulator
- 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
Landscapes
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Mechanical Light Control Or Optical Switches (AREA)
Abstract
This utility model provides a kind of polarized controller being applied to distributed optical fiber vibration sensing system, on the basis of the conspicuous once moral fibre optic interferometer structure of span, introduce signal processing module, Polarization Controller and phase-modulator, during application, apply sine wave to phase-modulator as reference signal, signal processing module obtains the signal that photodetector receives, and signal is analyzed processing, the modulation voltage value of corresponding Polarization Controller when obtaining two paths of signals difference minimum using simulated annealing, using this magnitude of voltage, Polarization Controller is controlled, the polarization state compensating light changes.Apply this device being capable of signal polarization state in a pickup arm in adjustment system, keep signal polarization state in two pickup arms consistent as far as possible, the anti-polarization degeneration ability of raising system, and largely eliminate the impact of the disturbance positioning precision to system for the single-mode fiber birefringence, improve the positioning precision of system.
Description
Technical field
This utility model is related to Fibre Optical Sensor and detection technique field, and more particularly, to one kind is applied to distributed optical fiber vibration
The polarized controller of sensor-based system.
Background technology
With the enhancing of scientific and technological development and people's security protection consciousness, a kind of investigative range of development is big, energy consumption is little, low cost
Perimeter security system becomes a necessary and problem in the urgent need to address.Distributed optical fiber vibration sensing system relies on it sensitive
Degree is high, electromagnetism interference, the advantages of need not powering, in security protection necks such as military defense, financial protection, energy security, community security
Domain there has been and is widely applied, and also will have vast application prospect in future.
It is exactly that the light vector direction of vibration participating in interfering is identical because light wave produces one of essential condition interfered, that is, have phase
Same polarization direction component.The optical fiber that actual perturbed system adopts is general single mode fiber, because the birefringence of single-mode fiber is special
Property, light wave entrance optical fiber retrodeviates polarization state and can change, and leads to the polarization state of line polarisation to be degenerated.In sensory field, this can lead to
Visibility of interference fringes reduces, or even interference fringe disappears, and then makes system that the positioning precision of disturbance is greatly reduced.
Although the polarization state of light can be kept constant using polarization maintaining optical fibre, due to the light of distributed optical fiber vibration sensing system
Fibre lays distance and is typically all up to tens kilometers, system cost can be made too high using polarization maintaining optical fibre.Therefore, in actual applications,
We must take the polarization of light in another kind of means countermeasure system to degenerate, and the polarization state compensating light changes, thus as much as possible
The system positioning that the birefringent characteristic of elimination single-mode fiber leads to is inaccurate.
Content of the invention
The purpose of this utility model is to provide a kind of polarized controller being applied to distributed optical fiber vibration sensing system,
In the case of being intended to excessively not improve cost, solve the problems, such as that the system positioning that the birefringent characteristic of single-mode fiber leads to is inaccurate.
This utility model solves its technical problem and be employed technical scheme comprise that：
A kind of polarized controller being applied to distributed optical fiber vibration sensing system, including light source, 1X4 beam splitter,
One circulator, the second circulator, the 3rd circulator, fourth annular device, the first photodetector, the second photodetector, the 3rd
Photodetector, the 4th photodetector, Polarization Controller, phase-modulator, sensing optic cable, signal processing module, wherein：
Light source is connected to the first end of 1X4 beam splitter, the second end of 1X4 beam splitter respectively with first annular device, the second ring
Shape device, the 3rd circulator, fourth annular device connect；
First annular device is also connected with the first photodetector, and the second circulator is also connected with the second photodetector, the
Three circulators are also connected with the 3rd photodetector, and fourth annular device is also connected with the 4th photodetector；
First photodetector, the second photodetector, the 3rd photodetector, the 4th photodetector also respectively with letter
Number processing module connects；
Sensing optic cable includes the first optical fiber, the second optical fiber, the first optical fiber be connected to first annular device and the 3rd circulator it
Between, the second optical fiber is connected between the second circulator and fourth annular device；
Polarization Controller is connected on the first optical fiber, and Polarization Controller is also connected with signal processing module；Phase-modulator
It is connected on the second optical fiber, phase-modulator is also connected with signal processing module.
On the basis of above-described embodiment, further, signal processing module includes data collecting card, computer and monolithic
Machine, wherein：
The input of data collecting card is connected with the first photodetector, the second photodetector respectively, data collecting card
Outfan be connected with computer；
Computer is also connected with single-chip microcomputer；
Single-chip microcomputer is also connected with Polarization Controller, phase-modulator respectively.
On the basis of above-mentioned any embodiment, further, described light source is continuous mono-colour laser.
On the basis of above-mentioned any embodiment, further, described Polarization Controller is extrusion pressing type Polarization Controller.
On the basis of above-described embodiment, further, described extrusion pressing type Polarization Controller includes four directions of extrusion one-tenth
45 °, staggered optical fiber squeezer.
On the basis of above-mentioned any embodiment, further, described phase-modulator is adjusted for Lithium metaniobate birefringent phase
Device processed.
The beneficial effects of the utility model are：
This utility model provides a kind of polarized controller being applied to distributed optical fiber vibration sensing system, and application is originally
Device can signal polarization state in a pickup arm in adjustment system, keep the signal light polarization in two pickup arms as far as possible
State is consistent, thus being effectively improved the anti-polarization degeneration ability of distributed optical fiber vibration sensing system, and largely disappears
Except the impact of the disturbance positioning precision to system for the single-mode fiber birefringence, improve the positioning precision of system.
Brief description
With reference to the accompanying drawings and examples this utility model is further illustrated.
Fig. 1 shows a kind of polarization being applied to distributed optical fiber vibration sensing system that this utility model embodiment provides
The structural representation of control device.
In figure, 1, light source, 2,1X4 beam splitter, 301, first annular device, the 302, second circulator, the 303, the 3rd circulator,
304th, fourth annular device, 5, Polarization Controller, 6, phase-modulator, 7, sensing optic cable, the 801, first photodetector, 802,
Two photodetectors, the 803, the 3rd photodetector, the 804, the 4th photodetector, 9, data collecting card, 10, computer, 11,
Single-chip microcomputer, 12, signal processing module.
Specific embodiment
In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing and enforcement
Example, is further elaborated to this utility model.It should be appreciated that specific embodiment described herein is only in order to explain this
Utility model, does not limit this utility model.
As shown in figure 1, this utility model embodiment provides and a kind of is applied to the inclined of distributed optical fiber vibration sensing system
Shake control device, including light source 1,1X4 beam splitter 2, first annular device 301, the second circulator 302, the 3rd circulator 303,
Four circulators 304, the first photodetector 801, the second photodetector 802, the 3rd photodetector 803, the 4th smooth electrical resistivity survey
Survey device 804, Polarization Controller 5, phase-modulator 6, sensing optic cable 7, signal processing module 12, wherein：
Light source 1 is connected to the first end of 1X4 beam splitter 2, the second end of 1X4 beam splitter 2 respectively with first annular device 301,
Second circulator 302, the 3rd circulator 303, fourth annular device 304 connect；
First annular device 301 is also connected with the first photodetector 801, the second circulator 302 also with the second photodetection
Device 802 connects, and the 3rd circulator 303 is also connected with the 3rd photodetector 803, fourth annular device 304 also with the 4th smooth electrical resistivity survey
Survey device 804 to connect；
First photodetector 801, the second photodetector 802, the 3rd photodetector 803, the 4th photodetector
804 are also connected with signal processing module 12 respectively；
Sensing optic cable 7 includes the first optical fiber 701, the second optical fiber 702, the first optical fiber 701 be connected to first annular device 301 with
Between 3rd circulator 303, the second optical fiber 702 is connected between the second circulator 302 and fourth annular device 304；
Polarization Controller 5 is connected on the first optical fiber 701, and Polarization Controller 5 is also connected with signal processing module 12；Phase place
Manipulator 6 is connected on the second optical fiber 702, and phase-modulator 6 is also connected with signal processing module 12.
This utility model embodiment, on the basis of double Mach-Zehnders (Mach-Zehnder) fibre optic interferometer structure, is drawn
Enter signal processing module 12, Polarization Controller 5 and phase-modulator 6, apply this device to carry out use field during Polarization Control
Scape can be such：Apply the sine wave of certain frequency and amplitude to phase-modulator 6, as reference signal；Signal processing
Module 12 obtains the signal that in distributed optical fiber disturbance positioning system, photodetector 801,802,803,804 receives, and right
Signal is analyzed processing, and using simulated annealing, the optimal modulation voltage value being applied on Polarization Controller 5 is searched
Rope, the modulation voltage value of corresponding Polarization Controller when obtaining two paths of signals difference minimum；Using this magnitude of voltage to Polarization Control
Device 5 is controlled, and two paths of signals difference can be made to reach minimum, thus the polarization state compensating light changes, completes distribution type fiber-optic and shakes
The Polarization Control process of dynamic sensor-based system.This utility model embodiment can flashlight in a pickup arm in adjustment system inclined
Polarization state, keeps the signal polarization state in two pickup arms consistent as far as possible, thus be effectively improved distributed optical fiber vibration passing
The anti-polarization degeneration ability of sensing system, and largely eliminate single-mode fiber birefringence to the disturbance positioning precision of system
Impact, improves the positioning precision of system.
This utility model embodiment does not limit to signal processing module, it is preferred that believing on the basis of above-described embodiment
Number processing module can include data collecting card 9, computer 10 and single-chip microcomputer 11, wherein：The input of data collecting card 9 is respectively
It is connected with the first photodetector 801, the second photodetector 802, the outfan of data collecting card 9 is connected with computer 10；
Computer 10 is also connected with single-chip microcomputer 11；Single-chip microcomputer 11 is also connected with Polarization Controller 5, phase-modulator 6 respectively.Data acquisition
Card 9 is acquired to the voltage signal of the first photodetector 801 and the second photodetector 802 input, and sends into computer
10 process；The process gathering signal that data collecting card 9 is sent is realized in software programming in computer 10, to realize most preferably adjusting
The iterative search of voltage processed, and the optimal modulation voltage searching is fed back to Polarization Controller 5 and phase place by single-chip microcomputer 11
Manipulator 6；Single-chip microcomputer 11, by being communicated with computer 10, can directly control Polarization Controller 5 with output digit signals, defeated
Go out sine wave signal phase-modulator 6 is modulated.
This utility model embodiment does not limit to light source 1, it is preferred that described on the basis of above-mentioned any embodiment
Light source 1 can be continuous mono-colour laser.
This utility model embodiment does not limit to Polarization Controller 5, on the basis of above-mentioned any embodiment, preferably
, described Polarization Controller 5 can be extrusion pressing type Polarization Controller.On this basis it is preferred that described extrusion pressing type Polarization Control
Device can include that four direction of extrusion is at 45 °, staggered optical fiber squeezer.In control process, using wherein the first two light
Fine squeezer, applies the voltage of various combination to it, can carry out different modulation to the polarization state of input light wave, thus exporting
The light wave of different polarization states；This extrusion pressing type Polarization Controller is connected on basic distributed optical fiber vibration sensing system sensor fibre
Wherein one tunnel, such as on the first optical fiber 701, realized to distributed optical fiber vibration by the polarization state modulating this road optical signal
The Polarization Control of sensor-based system.
This utility model does not limit to the material of phase-modulator, can select Lithium metaniobate (LiNbO3), GaAs
(GaAs) or polymer (Polymer) etc. as phase-modulator material, on the basis of above-mentioned any embodiment, preferably
, described phase-modulator can be Lithium metaniobate birefringent phase manipulator.Fiber waveguide in GaAs and polymer modulator
For carrying ridge waveguide, it is much greater with single-mode fiber with the loss ratio lithium niobate waveguides of single-mode fiber light connects, and polymer is modulated
The long-time stability of device are also undesirable, and therefore the embodiment of the present invention can select lithium niobate modulator, Lithium metaniobate birefringent phase
Manipulator makes fiber waveguide by titanium diffusion technique, and input-output optical fiber is tiltedly coupled with waveguide precision, using the electricity of niobic acid lithium material
Photo effect realizes phase-modulation to by TE, TM mould optical signal of fiber waveguide.
It should be noted that in the case of not conflicting, the embodiment in this utility model and the feature in embodiment can
To be mutually combined；In addition, the conventional adaptation that the function that is related to of this utility model, algorithm, method etc. are only prior art should
With, therefore, this utility model, for the improvement of prior art, is substantially the annexation between hardware, rather than for function,
Algorithm, method itself, although namely this utility model be related to some functions, algorithm, method, do not comprise to function, algorithm,
Method itself propose improvement, this utility model for function, algorithm, method description, be to better illustrate this practicality
New, in order to be better understood from this utility model.
Although this utility model have been carried out a certain degree of description it will be apparent that, without departing from spirit of the present utility model
The suitable change of each condition under conditions of scope, can be carried out.It is appreciated that this utility model is not limited to described embodiment party
Case, and it is attributed to the scope of claim, it includes the equivalent of each factor described.
Claims (6)
1. a kind of polarized controller being applied to distributed optical fiber vibration sensing system is it is characterised in that include light source, 1X4
Beam splitter, first annular device, the second circulator, the 3rd circulator, fourth annular device, the first photodetector, the second smooth electrical resistivity survey
Survey device, the 3rd photodetector, the 4th photodetector, Polarization Controller, phase-modulator, sensing optic cable, signal processing mould
Block, wherein：
Light source is connected to the first end of 1X4 beam splitter, the second end of 1X4 beam splitter respectively with first annular device, the second circulator,
3rd circulator, fourth annular device connect；
First annular device is also connected with the first photodetector, and the second circulator is also connected with the second photodetector, the 3rd ring
Shape device is also connected with the 3rd photodetector, and fourth annular device is also connected with the 4th photodetector；
First photodetector, the second photodetector, the 3rd photodetector, the 4th photodetector also respectively with signal at
Reason module connects；
Sensing optic cable includes the first optical fiber, the second optical fiber, and the first optical fiber is connected between first annular device and the 3rd circulator, the
Two optical fiber are connected between the second circulator and fourth annular device；
Polarization Controller is connected on the first optical fiber, and Polarization Controller is also connected with signal processing module；Phase-modulator is connected
On the second optical fiber, phase-modulator is also connected with signal processing module.
2. the polarized controller being applied to distributed optical fiber vibration sensing system according to claim 1, its feature exists
In signal processing module includes data collecting card, computer and single-chip microcomputer, wherein：
The input of data collecting card is connected with the first photodetector, the second photodetector respectively, data collecting card defeated
Go out end to be connected with computer；
Computer is also connected with single-chip microcomputer；
Single-chip microcomputer is also connected with Polarization Controller, phase-modulator respectively.
3. the polarized controller being applied to distributed optical fiber vibration sensing system according to claim 1 and 2, its feature
It is, described light source is continuous mono-colour laser.
4. the polarized controller being applied to distributed optical fiber vibration sensing system according to claim 1 and 2, its feature
It is, described Polarization Controller is extrusion pressing type Polarization Controller.
5. the polarized controller being applied to distributed optical fiber vibration sensing system according to claim 4, its feature exists
Include in, described extrusion pressing type Polarization Controller that four direction of extrusion is at 45 °, staggered optical fiber squeezer.
6. the polarized controller being applied to distributed optical fiber vibration sensing system according to claim 1 and 2, its feature
It is, described phase-modulator is Lithium metaniobate birefringent phase manipulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620912567.0U CN206002195U (en) | 2016-08-19 | 2016-08-19 | It is applied to the polarized controller of distributed optical fiber vibration sensing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620912567.0U CN206002195U (en) | 2016-08-19 | 2016-08-19 | It is applied to the polarized controller of distributed optical fiber vibration sensing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206002195U true CN206002195U (en) | 2017-03-08 |
Family
ID=58196515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620912567.0U Active CN206002195U (en) | 2016-08-19 | 2016-08-19 | It is applied to the polarized controller of distributed optical fiber vibration sensing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206002195U (en) |
-
2016
- 2016-08-19 CN CN201620912567.0U patent/CN206002195U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5015053A (en) | Reduction of modulator non-linearities with independent bias angle control | |
| US5104222A (en) | System and method for minimizing input polarization-induced phase noise in an interferometric fiber-optic sensor depolarized input light | |
| CN102510307B (en) | Optical fiber disturbance system polarization control method and control system based on annealing algorithm | |
| CN104898306A (en) | MZ modulator random point bias control device and method | |
| RU2444704C1 (en) | Fibre-optic gyroscope | |
| CN102291181A (en) | Polarization control method and system of distributed optical fiber disturbance positioning system | |
| CN103995468B (en) | Polarization control method, based on genetic algorithm, of optical fiber disturbance system and device thereof | |
| CN107560646A (en) | A kind of optical fiber sensing system | |
| CN102401666A (en) | Method and device for demodulating reflection wavelength of fiber Bragg grating | |
| CN102419435B (en) | Optical detection assembly based on all-fiber bias light suppression technology and near-field signal dynamic range suppression technology in laser radar | |
| Birch et al. | Real-time optical aberration correction with a ferroelectric liquid-crystal spatial light modulator | |
| CN111198593B (en) | Super-thread photon calculation structure | |
| GB2100855A (en) | Sideband modulating/ demodulating fibre optic gyroscope | |
| CN103792847A (en) | Optical fiber disturbance polarization control device based on particle swarm optimization | |
| CN206002195U (en) | It is applied to the polarized controller of distributed optical fiber vibration sensing system | |
| CN102624447B (en) | Double-optical-path real-time control differential interference receiving device | |
| Kyselák et al. | Fiber optic polarization temperature sensor for biomedical and military security systems | |
| CN112596252A (en) | Light beam drift compensation device without mechanical structure and implementation method thereof | |
| CN108267216A (en) | Polarization state synchronous control system and method | |
| CN101320502A (en) | Optical fiber perimeter alarm method and device for implementing anti-polarization decay | |
| CN205981244U (en) | Optic fibre disturbance polarization control of system device | |
| US5335062A (en) | Apparatus for all-optical self-aligning holographic phase modulation and motion sensing and method sensing and method for sensing such phase modulation | |
| US5495366A (en) | Apparatus and method for eliminating polarization sensitivity in transducers | |
| Spammer et al. | Differentiating optical-fiber Mach–Zehnder interferometer | |
| CN115954753A (en) | Polarization-controlled laser power stability control device and method and laser emitting equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |