CN108981762A - Thermostabilization sensing demodulating system and method are carried out using the double phase-shifted fiber gratings in narrowband - Google Patents
Thermostabilization sensing demodulating system and method are carried out using the double phase-shifted fiber gratings in narrowband Download PDFInfo
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- CN108981762A CN108981762A CN201810631471.0A CN201810631471A CN108981762A CN 108981762 A CN108981762 A CN 108981762A CN 201810631471 A CN201810631471 A CN 201810631471A CN 108981762 A CN108981762 A CN 108981762A
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- 239000000835 fiber Substances 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000003287 optical effect Effects 0.000 claims abstract description 31
- 230000010287 polarization Effects 0.000 claims abstract description 14
- 230000008859 change Effects 0.000 claims description 14
- 230000010355 oscillation Effects 0.000 claims description 14
- 230000005693 optoelectronics Effects 0.000 claims description 11
- 238000005259 measurement Methods 0.000 claims description 10
- 239000013307 optical fiber Substances 0.000 claims description 9
- 230000010363 phase shift Effects 0.000 claims description 7
- 230000035559 beat frequency Effects 0.000 claims description 5
- 230000003321 amplification Effects 0.000 claims description 4
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 230000008569 process Effects 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 1
- 238000005516 engineering process Methods 0.000 description 5
- 230000035945 sensitivity Effects 0.000 description 4
- 239000011551 heat transfer agent Substances 0.000 description 2
- 230000005622 photoelectricity Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
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- 238000012545 processing Methods 0.000 description 1
- 238000000985 reflectance spectrum Methods 0.000 description 1
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Classifications
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- 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
- G01D5/268—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 using optical fibres
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- 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
Abstract
The present invention provide it is a kind of carry out thermostabilization sensing demodulating system and method using the double phase-shifted fiber gratings in narrowband, which includes Wavelength tunable laser interconnected, Polarization Controller, phase-modulator, three ports light rings, double phase-shifted fiber gratings, fiber amplifier, photodetector, microwave amplifier, micro-wave coupler；The first port of the optical circulator is connected with the output port of the phase-modulator, and the second port of the optical circulator is connected with a pair of phase-shifted fiber grating, and the third port of the optical circulator is connected with fiber amplifier；The input terminal of the micro-wave coupler is connected with the output end of microwave amplifier, and the first output end of the micro-wave coupler is connected with phase-modulator radio-frequency head, and the second output terminal of the micro-wave coupler is connected with an electric frequency spectrograph.
Description
Technical field
The present invention relates to microwave signal generate microwave photon field and optical fiber grating sensing field, more particularly, to
It is a kind of to carry out thermostabilization sensing demodulating system and method using the double phase-shifted fiber gratings in narrowband.
Background technique
Optical fiber sensing technology due to electromagnetism interference, resist chemical, essential safety, resistance to high/low temperature, it is small in size,
Many advantages, such as light-weight, soft flexible, in aerospace, civil engineering, electric system, petrochemical industry, medical treatment & health, family
Extensive and important application is obtained in the fields such as front yard security protection.
Fiber grating is always the hot spot of researchers' concern as the important optical device in optical fiber sensing technology.Light
Fine grating type sensor has Wavelength-encoding characteristic to heat transfer agent, and also referred to as wavelength modulating characteristic, i.e. sensor is experienced
External information will cause the change of optical wavelength.Heat transfer agent is extracted from optical wavelength variation and is carried out from data as needed
Reason, that is, sensing and demodulating technology.Wavelength-encoding type sensor fluctuates light source power, bending loss of optical fiber and junction loss draw
The light intensity variation risen is insensitive, has very high Stability and dependability, and reusability is strong, is easy to wavelength-division, time division multiplexing,
It realizes quasi-distributed measurement, but also increases demodulation difficulty to a certain extent, therefore the demodulation of transducing signal is optical fiber light
The key of the further industrialization of grid-type sensor, exploring effective and inexpensive demodulation mode becomes the research weight in field
Point.
In addition, i.e. temperature and stress can cause fiber grating simultaneously since fiber grating pair temperature and stress are sensitive simultaneously
Central wavelength is mobile, so that can not be subject to area to the influence of temperature and stress only by measurement fiber bragg grating center wavelength movement
Point, here it is cross sensitivity problems.Cross sensitivity problem is an eigenvalue problem of fiber-optic grating sensor.It can be said that its companion
Occur with the appearance of fiber-optic grating sensor.Increasingly mature with Fabrication Methods of Fiber Gratings, cross sensitivity is at system
An about major issue of fiber-optic grating sensor functionization.In order to overcome cross-sensitivity, the standard of single physical amount is realized
Really measurement, it has already been proposed many technical solutions, and constantly have new method to occur.
Summary of the invention
The present invention provide it is a kind of carry out thermostabilization sensing demodulating systems using the double phase-shifted fiber gratings in narrowband, which can
Realize heat-staple optic fiber grating wavelength demodulation.
Another object of the present invention is to provide a kind of the double phase-shifted fiber gratings in narrowband to be utilized to carry out thermostabilization sensing and demodulatings
Method.
In order to reach above-mentioned technical effect, technical scheme is as follows:
It is a kind of to carry out thermostabilization sensing demodulating system using the double phase-shifted fiber gratings in narrowband, including wavelength interconnected can
Tuned laser, Polarization Controller, phase-modulator, three ports light rings, double phase-shifted fiber gratings, fiber amplifier, light
Electric explorer, microwave amplifier, micro-wave coupler；The output end of the first port of the optical circulator and the phase-modulator
Mouthful be connected, the second port of the optical circulator is connected with a pair of phase-shifted fiber grating, the third port of the optical circulator and
Fiber amplifier is connected；The input terminal of the micro-wave coupler is connected with the output end of microwave amplifier, the micro-wave coupler
The first output end be connected with phase-modulator radio-frequency head, the second output terminal of the micro-wave coupler and an electric frequency spectrograph phase
Even.
Further, the Wavelength tunable laser, Polarization Controller, phase-modulator, three ports light rings, double
Phase-shifted fiber grating, fiber amplifier, photodetector by optical fiber by being connected；It is the photodetector, microwave amplifier, micro-
Wave coupler, phase-modulator microwave input port be sequentially connected by microwave coaxial line.
Further, the phase-modulator, three ports light rings, double phase-shifted fiber gratings, fiber amplifier, photoelectricity
Detector, microwave amplifier, micro-wave coupler constitute a steady closure optoelectronic oscillation circuit.
A kind of to carry out thermostabilization sensing demodulation method using the double phase-shifted fiber gratings in narrowband, detailed process is as follows:
S1: the output light wave of Wavelength tunable laser reaches phase-modulator through Polarization Controller, by phase-modulator
The optical signal of output reaches quarter-phase fiber grating through the input port of three ports light rings；
S2: optical fiber is reached through the output port of three ports light rings by the optical signal of two-phase shifting fiber optical grating reflection
After amplifier amplification, photoelectric conversion is carried out into photodetector, the electric signal of photodetector output passes through microwave amplifier
It amplifies；
S3: the output end of microwave amplifier is connect with micro-wave coupler input terminal, in the electric signal of micro-wave coupler output
A part be loaded into the radio-frequency head of phase-modulator, form the loop of optical-electronic oscillator, another part is defeated as microwave signal
Out.
Further, the microwave signal of micro-wave coupler output includes fe1、fe2、fb:
fe1=fp1-fC fe2=fp2-fC fb=fe2-fe1
Wherein, fC,fp1,fp2Respectively represent frequency, the one of phase shift peak of double phase-shifted fiber gratings of laser output light
Another phase shift peak of centre frequency and double phase-shifted fiber gratings centre frequency, fbIt is non-thread due to optoelectronic oscillation loop
Property and the difference frequency generated, fC< fp1< fp2。
Further, frequency is f in double phase-shifted fiber gratingsp2Phase shifting region experience extraneous determinand as sensitive zones
The variation of reason amount, when the external world, sensing physical quantity changes, the centre frequency at the phase shift peak can change Δ f therewith, simultaneously
The microwave frequency f that optoelectronic oscillation generatese2Also it can change Δ f；And since centre frequency is fp1Phase shifting region be not felt by the external world
Physical quantity variation, therefore the microwave frequency f that optoelectronic oscillation generatese1It is constant, lead to difference frequency fbChange Δ f, by measuring difference frequency
Frequency shift is so as to demodulating measured physical quantity.
Further, when ambient temperature changes, in double phase-shifted fiber gratings two at phase shifting region can experience
To temperature change, fp1、fp2Occurrence frequency changes Δ f simultaneouslyT, therefore difference frequency fbIt remains unchanged, therefore can be to avoid external environment
Temperature changes the influence to measurement result, carries out thermostabilization sensing and demodulating.
Compared with prior art, the beneficial effect of technical solution of the present invention is:
The present invention has merged fiber grating sensing technology and Microwave photonics technology, wherein double phase-shifted fiber gratings are made simultaneously
For the filter unit in sensing element and optical-electronic oscillator, when extraneous measured physical quantity changes grating wavelength, optoelectronic oscillation is generated
Microwave frequency also change correspondingly, and ambient temperature variation the microwave frequency will not then be had an impact, overcome measurement
In cross sensitivity problem.It is demodulated since wavelength change is transformed into microwave domain, such method can give full play to photoelectricity
The fast feature of oscillator high-quality microwave signal measurement high resolution generated, processing speed, to realize high-resolution and height
The sensing measurement of demodulation speed, and without expensive high-frequency microwave signal source, device is simple.
Detailed description of the invention
Fig. 1 is the structure chart of present system；
Fig. 2-4 is the method for the present invention schematic illustration.
Specific embodiment
The attached figures are only used for illustrative purposes and cannot be understood as limitating the patent；
In order to better illustrate this embodiment, the certain components of attached drawing have omission, zoom in or out, and do not represent actual product
Size；
To those skilled in the art, it is to be understood that certain known features and its explanation, which may be omitted, in attached drawing
's.
The following further describes the technical solution of the present invention with reference to the accompanying drawings and examples.
As shown in Figure 1, a kind of carry out thermostabilization sensing demodulating system using the double phase-shifted fiber gratings in narrowband, comprising: wavelength
Tunable laser 1, Polarization Controller 2, phase-modulator 3, optical circulator 4, double phase-shifted fiber gratings 5, image intensifer 6, light
Electric explorer 7, microwave amplifier 8, micro-wave coupler 9；
Wavelength tunable laser exports Single wavelength light wave, the input terminal of the Polarization Controller 2 for generating light carrier
It is connected with Wavelength tunable laser 1, output end is connect with phase-modulator 3, and the Polarization Controller 2 is for adjusting light load
The polarization state of wave；
2 output end of Polarization Controller is connected with phase-modulator 3, which is used to carry out phase to input light carrier
Position modulation.
3 output end of phase-modulator is connected with the end a of optical circulator 4；The end b of optical circulator 4 and two-phase shifting fiber light
One end of grid 5 is connected, and on the one hand which is used as sensing element, on the one hand for after filtering out phase-modulation
Component frequency in optical signal.
The end c of optical circulator 4 is connected with the input terminal of image intensifer 6, and the image intensifer for amplifying optical signal, put by light
The output end of big device 6 is connected with the input terminal of photodetector 7, which converts optical signals to microwave signal.
The output end of photodetector 7 is connected with the input terminal of microwave amplifier 8, and the microwave amplifier is for amplifying light
The microwave signal that electric explorer generates.The output end of microwave amplifier 8 is connected with the input terminal of micro-wave coupler 9, the microwave
A part in the electric signal of coupler output is loaded into the rf inputs of phase-modulator, forms the ring of optical-electronic oscillator
Road, another part are exported as microwave signal.
Between Wavelength tunable laser 1 and Polarization Controller 2, between Polarization Controller 2 and phase-modulator 3, phase
Between modulator 3 and optical circulator 4, between optical circulator 4 and double phase-shifted fiber gratings 5, optical circulator 4 and image intensifer 6 it
Between, connected with standard single-mode fiber between image intensifer 6 and photodetector 7, standard radio frequency connecting line is used between remaining device
Connection.
The light carrier f that Wavelength tunable laser generatesCPhase-modulation is carried out into phase-modulator, in optical-electronic oscillator
Before stable oscillation stationary vibration output, modulated signal has wideband frequency ingredient, and modulated signal has a series of sidebands.It is modulated
Signal enters double phase-shifted fiber gratings by the port optical circulator a, falls into narrowband transmission peaks in phase-shifted fiber grating reflectance spectrum
Two sideband (f in Fig. 2p1,2) port optical circulator b cannot be reflected back into, the symmetrical sideband f corresponding to carrier waveC-fe1,2It is logical
Crossing optical circulator to enter photodetector and light carrier beat frequency generation frequency is fe1、fe2Microwave signal, while the two microwaves
Signal beat frequency generates difference frequency signal fb.And when other sidebands enter photodetector, due to the beat frequency of its upper side band and carrier wave
Signal and corresponding lower sideband are identical as carrier wave beat signal opposite in phase, amplitude, only generate direct current signal to cancel out each other.Light
The microwave signal f that electric explorer generatese1、fe2、fbAfter microwave amplification and micro-wave coupler, a part is as output oscillation
The rf inputs of signal, a part of input phase modulator are modulated carrier wave, positive feedback loop are formed, when in loop
When gain is enough the loss in compensation loop, the microwave signal of stable oscillation stationary vibration can be formed in loop.
As shown in figure 3, frequency is f in double phase-shifted fiber gratingsp2Phase shifting region as sensitive zones experience it is extraneous to
Physical quantity variation is surveyed, when the external world, sensing physical quantity changes, the centre frequency at the phase shift peak can change Δ f therewith,
The microwave frequency f that optoelectronic oscillation generates simultaneouslye2Also it can change Δ f；And since centre frequency is fp1Phase shifting region be not felt by
External physical quantity variation, therefore the microwave frequency f that optoelectronic oscillation generatese1It is constant, lead to difference frequency fbChange Δ f, passes through measurement
Beat frequency changes so as to demodulate to measured physical quantity.
As shown in figure 4, when ambient temperature changes, in double phase-shifted fiber gratings two at phase shifting region can experience
To temperature change, fp1、fp2Occurrence frequency changes Δ f simultaneouslyT, therefore difference frequency fbIt remains unchanged, therefore can be to avoid external environment
Temperature changes the influence to measurement result, carries out thermostabilization sensing and demodulating.
The same or similar label correspond to the same or similar components；
Described in attached drawing positional relationship for only for illustration, should not be understood as the limitation to this patent；
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention.For those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.It is all this
Made any modifications, equivalent replacements, and improvements etc., should be included in the claims in the present invention within the spirit and principle of invention
Protection scope within.
Claims (7)
1. a kind of carry out thermostabilization sensing demodulating system using the double phase-shifted fiber gratings in narrowband, which is characterized in that including mutually interconnecting
Wavelength tunable laser, Polarization Controller, phase-modulator, three ports light rings, the double phase-shifted fiber gratings, optical fiber connect
Amplifier, photodetector, microwave amplifier, micro-wave coupler；The first port of the optical circulator and the phase-modulation
The output port of device is connected, and the second port of the optical circulator is connected with a pair of phase-shifted fiber grating, the optical circulator
Third port is connected with fiber amplifier；The input terminal of the micro-wave coupler is connected with the output end of microwave amplifier, described
First output end of micro-wave coupler is connected with phase-modulator radio-frequency head, the second output terminal of the micro-wave coupler and an electricity
Frequency spectrograph is connected.
2. according to claim 1 carry out thermostabilization sensing demodulating system, feature using the double phase-shifted fiber gratings in narrowband
It is, the Wavelength tunable laser, Polarization Controller, phase-modulator, three ports light rings, two-phase shifting fiber light
Grid, fiber amplifier, photodetector by optical fiber by being connected；The photodetector, microwave amplifier, micro-wave coupler,
The microwave input port of phase-modulator is sequentially connected by microwave coaxial line.
3. according to claim 2 carry out thermostabilization sensing demodulating system, feature using the double phase-shifted fiber gratings in narrowband
It is, the phase-modulator, three ports light rings, double phase-shifted fiber gratings, fiber amplifier, photodetector, microwave
Amplifier, micro-wave coupler constitute a steady closure optoelectronic oscillation circuit.
4. a kind of demodulation method for carrying out thermostabilization sensing demodulating system using the double phase-shifted fiber gratings in narrowband, which is characterized in that
Detailed process is as follows:
S1: the output light wave of Wavelength tunable laser reaches phase-modulator through Polarization Controller, is exported by phase-modulator
Optical signal reach quarter-phase fiber grating through the input port of three ports light rings；
S2: fiber amplifier is reached through the output port of three ports light rings by the optical signal of two-phase shifting fiber optical grating reflection
After device amplification, photoelectric conversion is carried out into photodetector, the electric signal of photodetector output is carried out by microwave amplifier
Amplification；
S3: the output end of microwave amplifier is connect with micro-wave coupler input terminal, one in the electric signal of micro-wave coupler output
It is partially loaded into the radio-frequency head of phase-modulator, forms the loop of optical-electronic oscillator, another part is exported as microwave signal.
5. according to claim 4 carry out thermostabilization sensing demodulation method, feature using the double phase-shifted fiber gratings in narrowband
It is, the microwave signal of micro-wave coupler output includes fe1、fe2、fb:
fe1=fp1-fC fe2=fp2-fC fb=fe2-fe1
Wherein, fC,fp1,fp2Respectively represent the frequency of laser output light, in the one of phase shift peak of double phase-shifted fiber gratings
The centre frequency at another phase shift peak of frequency of heart and double phase-shifted fiber gratings, fbFor due to the non-linear of optoelectronic oscillation loop and
The difference frequency of generation, fC< fp1< fp2。
6. according to claim 5 carry out thermostabilization sensing demodulation method, feature using the double phase-shifted fiber gratings in narrowband
It is, frequency is f in double phase-shifted fiber gratingsp2Phase shifting region experience extraneous measured physical quantity variation as sensitive zones, when
External world's sensing physical quantity is when changing, and the centre frequency at the phase shift peak can change Δ f therewith, while optoelectronic oscillation generates
Microwave frequency fe2Also it can change Δ f；And since centre frequency is fp1Phase shifting region be not felt by external physical quantity variation,
Therefore the microwave frequency f that optoelectronic oscillation generatese1It is constant, lead to difference frequency fbChange Δ f, by measurement beat frequency change to
Measured physical quantity can be demodulated.
7. according to claim 6 carry out thermostabilization sensing demodulation method, feature using the double phase-shifted fiber gratings in narrowband
Be, when ambient temperature changes, in double phase-shifted fiber gratings two at phase shifting region can experience temperature change,
fp1、fp2Occurrence frequency changes Δ f simultaneouslyT, therefore difference frequency fbIt remains unchanged, therefore can change to avoid ambient temperature to survey
The influence of result is measured, thermostabilization sensing and demodulating is carried out.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110736436A (en) * | 2019-09-01 | 2020-01-31 | 天津大学 | Phase-shift fiber grating sensing sensitivity stabilizing system and method based on wavelength following |
| CN111579816A (en) * | 2020-05-14 | 2020-08-25 | 天津大学 | Acceleration measuring instrument based on photoelectric oscillator |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102368582A (en) * | 2011-09-22 | 2012-03-07 | 浙江大学 | Laser wavelength adjustment-based opto-electronic oscillator with tunable frequency and broadband |
| CN102931568A (en) * | 2012-11-14 | 2013-02-13 | 浙江大学 | Photoelectricity oscillator based on narrow-band double-peak phase shift fiber bragg grating and method thereof |
| CN103344194A (en) * | 2013-07-17 | 2013-10-09 | 中国科学院半导体研究所 | Phase-shifting fiber Bragg grating strain sensing system based on photoelectric oscillator |
| CN104377533A (en) * | 2014-11-10 | 2015-02-25 | 中国电子科技集团公司第四十四研究所 | Phase shift optical grating based frequency self-stabilization photoelectric oscillator |
| CN104752940A (en) * | 2013-12-27 | 2015-07-01 | 北京邮电大学 | Photoelectric oscillator |
| JP2015161674A (en) * | 2014-02-28 | 2015-09-07 | 富士重工業株式会社 | Vibration detector and vibration detection method |
| CN105547336A (en) * | 2015-12-02 | 2016-05-04 | 厦门大学 | Fiber grating sensing demodulation device and method on the basis of photoelectric oscillation loop |
| CN107946877A (en) * | 2017-12-08 | 2018-04-20 | 华中科技大学 | A kind of bicyclic optical-electronic oscillator stablized from polarization state |
-
2018
- 2018-06-19 CN CN201810631471.0A patent/CN108981762A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102368582A (en) * | 2011-09-22 | 2012-03-07 | 浙江大学 | Laser wavelength adjustment-based opto-electronic oscillator with tunable frequency and broadband |
| CN102931568A (en) * | 2012-11-14 | 2013-02-13 | 浙江大学 | Photoelectricity oscillator based on narrow-band double-peak phase shift fiber bragg grating and method thereof |
| CN103344194A (en) * | 2013-07-17 | 2013-10-09 | 中国科学院半导体研究所 | Phase-shifting fiber Bragg grating strain sensing system based on photoelectric oscillator |
| CN104752940A (en) * | 2013-12-27 | 2015-07-01 | 北京邮电大学 | Photoelectric oscillator |
| JP2015161674A (en) * | 2014-02-28 | 2015-09-07 | 富士重工業株式会社 | Vibration detector and vibration detection method |
| CN104377533A (en) * | 2014-11-10 | 2015-02-25 | 中国电子科技集团公司第四十四研究所 | Phase shift optical grating based frequency self-stabilization photoelectric oscillator |
| CN105547336A (en) * | 2015-12-02 | 2016-05-04 | 厦门大学 | Fiber grating sensing demodulation device and method on the basis of photoelectric oscillation loop |
| CN107946877A (en) * | 2017-12-08 | 2018-04-20 | 华中科技大学 | A kind of bicyclic optical-electronic oscillator stablized from polarization state |
Non-Patent Citations (3)
| Title |
|---|
| OU XU等: "A reconfigurable microwave photonic filter based on a phase-shifted FBG of two phase shifts", 《2017 INTERNATIONAL TOPICAL MEETING ON MICROWAVE PHOTONICS (MWP)》 * |
| OU XU等: "Dual-frequency Optoelectronic Oscillator for Thermal-Insensitive Interrogation of a FBG Strain Sensor", 《IEEE PHOTONICS TECHNOLOGY LETTERS 》 * |
| WANGZHE LI等: "A Narrow-Passband and Frequency-Tunable Microwave Photonic Filter Based on Phase-Modulation to Intensity-Modulation Conversion Using a Phase-Shifted Fiber Bragg Grating", 《IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110736436A (en) * | 2019-09-01 | 2020-01-31 | 天津大学 | Phase-shift fiber grating sensing sensitivity stabilizing system and method based on wavelength following |
| CN110736436B (en) * | 2019-09-01 | 2021-07-06 | 天津大学 | Phase-shift fiber grating sensing sensitivity stabilizing method based on wavelength following |
| CN111579816A (en) * | 2020-05-14 | 2020-08-25 | 天津大学 | Acceleration measuring instrument based on photoelectric oscillator |
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Application publication date: 20181211 |