CN109357672A - A method of the bi-directional light based on circulator structure carries microwave resonance system and its detection angular speed - Google Patents
A method of the bi-directional light based on circulator structure carries microwave resonance system and its detection angular speed Download PDFInfo
- Publication number
- CN109357672A CN109357672A CN201811290663.6A CN201811290663A CN109357672A CN 109357672 A CN109357672 A CN 109357672A CN 201811290663 A CN201811290663 A CN 201811290663A CN 109357672 A CN109357672 A CN 109357672A
- Authority
- CN
- China
- Prior art keywords
- chamber
- long
- light
- microwave
- optical
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C19/00—Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
- G01C19/58—Turn-sensitive devices without moving masses
- G01C19/64—Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams
- G01C19/66—Ring laser gyrometers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C19/00—Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
- G01C19/58—Turn-sensitive devices without moving masses
- G01C19/64—Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams
- G01C19/66—Ring laser gyrometers
- G01C19/661—Ring laser gyrometers details
- G01C19/665—Ring laser gyrometers details control of the cavity
Abstract
The method that the bi-directional light based on circulator structure that the invention discloses a kind of carries microwave resonance system and its detects angular speed.The present invention generates the light load microwave along the inverse vertical high stability of two-way polarization state using regenerative mode locking technology, the long control technology of chamber and polarization state isolation technics in fiber optic loop, for measuring angular velocity of rotation.The present invention uses circulator structure, realizes that bi-directional light carries microwave resonance by two-way regenerative mode locking technology；Irreplaceable error technology for eliminating based on wide range optical interferometer, the bi-directional light for realizing reciprocity carry microwave resonance system；The dual wavelength separation of optical signal is realized using polarization state isolation technics, and is transmitted in opposite directions in sensing ring using vertical polarization state, and sensing ring detectability is improved；Using the long control technology of chamber, by the microwave oscillation Frequency Locking in a direction to high stability standard time reference source, the opposite chamber for stabilizing optical cavity is long；Present system and method have the characteristics that practical, measurement accuracy is high.
Description
Technical field
The invention belongs to high-precision optical gyroscope technology field more particularly to a kind of bi-directional light loads based on circulator structure
Microwave resonance system and its method for detecting angular speed.
Background technique
In inertial navigation field, carrier translational velocity is usually detected using accelerometer, with gyroscope detection carrier rotation
Tarnsition velocity.High accuracy gyroscope instrument mainly has mechanical gyro and optical gyroscope two types, in fields such as military affairs, industry, science
It is widely applied.Wherein optical gyroscope mainly includes two class of laser gyro and optical fibre gyro.Although laser gyro precision is high, deposit
In latch up effect, maintenance cost is higher；Interference type optical fiber gyroscope is there are optical power utilization rate is low, temperature error, parasitic noise etc.
Defect, detection accuracy are relatively low；Resonance type optical fiber gyro is easy to be miniaturized, but very high to light source requirements, at present practicability also to
It improves.Although compared to mechanical gyro, the stability of optical gyroscope entirety still has deficiency, its is compact-sized, sensitivity is high etc.
Feature makes optical gyroscope still occupy important share in the market in high accuracy gyroscope.
The basic principle that optical gyroscope detects carrier angular velocity of rotation is Sagnac effect (Sagnac effect).Sa
The basic principle of lattice nanogram effect is in closure optical path, by same light source sending along (CW) clockwise and counterclockwise
(CCW) two-beam transmitted generates different optical path differences due to carrier rotation, to generate phase difference or difference on the frequency.Due to producing
Raw phase difference or difference on the frequency is only related to carrier angular velocity of rotation, the phase difference or difference on the frequency generated by detection optical gyroscope
The measurement of carrier angular velocity of rotation can be realized.Realize Sagnac effect detect, it is necessary first to realize same light source along suitable
Hour hands (CW) and counterclockwise (CCW) transmission, due to the limitation of the two-way transmission capabilities of photoelectric device, along (CW) clockwise and
Counterclockwise the optical cavity characteristic of (CCW) cannot achieve identical, therefore the irreplaceable error introduced can reduce light
Carry the precision of microwave gyroscope.Therefore, the highly reliable optical gyroscope of high-precision is still the emphasis of gyro research.
Summary of the invention
It is an object of the invention to overcome the shortcomings of existing optical gyroscope angular velocity measurement scheme, provide a kind of based on annular
The method that the bi-directional light of device structure carries microwave resonance system and its detects angular speed.
To achieve the above object, the present invention uses following design scheme: a kind of bi-directional light load based on circulator structure is micro-
Wave resonance system, the system include wide spectrum light source, 50:50 coupler, the first wavelength division multiplexer, the second wavelength division multiplexer, low speed
Photoelectric converter, interferometer controller, the long compensated regulator of chamber, the first image intensifer, the first photoelectricity intensity modulator, the first light
Circulator, the first photo-coupler, the two-way optical filter in narrowband, the second photo-coupler, the second image intensifer, the second photoelectricity intensity tune
Device processed, the second optical circulator, the long adjuster of the first regeneration chamber chamber, the first high-speed photodetector, the amplification of the first microwave filtering are single
Member, the first microwave power distributor, the long adjuster of the second regeneration chamber chamber, the second high-speed photodetector, the amplification of the second microwave filtering are single
Member, sensing ring interferometer structure, the second microwave power distributor, third microwave power distributor and difference frequency detection unit；
First image intensifer, the first photoelectricity intensity modulator, the long compensated regulator of chamber, the first optical circulator, second
Wavelength division multiplexer, the first photo-coupler, the two-way optical filter in narrowband, sensing ring interferometer structure, the second photo-coupler, first wave
Division multiplexer and the second optical circulator, which are sequentially connected, constitutes clockwise direction ring resonator；Clockwise direction harmonic light successively passes through
Cross the first photo-coupler, the second long adjuster of regeneration chamber chamber, the second high-speed photodetector, the second microwave filtering amplifying unit and
Third microwave power distributor feedback modulation the first photoelectricity intensity modulator constitutes clockwise direction regenerative mode locking structure；Side clockwise
The electric signal generated to regenerative mode locking structure inputs difference frequency detection unit by third microwave power distributor；
Second image intensifer, the second photoelectricity intensity modulator, the second optical circulator, the first wavelength division multiplexer, second
Photo-coupler, sensing ring interferometer structure, the two-way optical filter in narrowband, first the second wavelength division multiplexer of photo-coupler and the first light
Circulator, which is sequentially connected, constitutes counter clockwise direction ring resonator；Counter clockwise direction harmonic light successively pass through the second photo-coupler,
The first long adjuster of regeneration chamber chamber, the first high-speed photodetector, the first microwave filtering amplifying unit, the first microwave power distributor and
Second microwave power distributor feedback modulation the second photoelectricity intensity modulator constitutes counter clockwise direction regenerative mode locking structure；Side counterclockwise
The electric signal generated to regenerative mode locking structure inputs difference frequency detection unit by the second microwave power distributor；
The wide spectrum light source, 50:50 coupler, the first wavelength division multiplexer, the second wavelength division multiplexer, Low speed photo conversion
Device, interferometer controller and the long compensated regulator of chamber form the reciprocity error compensation wide range interference of light along double loop counterclockwise
Instrument；The light that the wide spectrum light source issues is divided into two-arm through 50:50 coupler, and the first arm passes sequentially through the second wavelength division multiplexer, the
One optical circulator, the second image intensifer, the second photoelectricity intensity modulator, the second optical circulator, the first wavelength division multiplexer, 50:50
Coupler enters Low speed photo converter；Second arm passes sequentially through the first wavelength division multiplexer, the second optical circulator, the first light amplification
Device, the first photoelectricity intensity modulator, the long compensated regulator of chamber, the first optical circulator, the second wavelength division multiplexer, 50:50 coupler
Into Low speed photo converter；The detection signal of the Low speed photo converter passes through interferometer controller, and output control chamber is long
Compensated regulator realizes that the two-arm light path of wide range optical interferometer is identical, eliminates nonreciprocal mistake caused by non-bidirectional device in two-arm
Difference；The light that the wide spectrum light source issues is not interfered with harmonic light clockwise and harmonic light counterclockwise；
The sensing ring interferometer structure includes that the first orthogonal polarisation state adjusts unit, polarization beam apparatus, optical fiber sensing ring
Unit is adjusted with the second orthogonal polarisation state；
Clockwise direction harmonic light adjusts unit for the bimodal of the two-way optical filter in narrowband by the first orthogonal polarisation state
Spectral signal is adjusted to the vertical two paths of signals of polarization state, enters optical fiber sensing ring by polarization beam apparatus, successively by polarization
Beam splitter, the second orthogonal polarisation state adjust unit and polarization state are recalled to original state；
Counter clockwise direction harmonic light adjusts unit for the bimodal of the two-way optical filter in narrowband by the second orthogonal polarisation state
Spectral signal is adjusted to the vertical two paths of signals of polarization state, enters optical fiber sensing ring by polarization beam apparatus, successively by polarization
Beam splitter, the first orthogonal polarisation state adjust unit and polarization state are recalled to original state.
Further, the bi-directional light based on circulator structure carries microwave resonance system, is regenerated using clockwise direction
The microwave signal input difference frequency detection unit that mould-locking structure and counter clockwise direction regenerative mode locking structure generate carries out angular velocity detection.
Further, harmonic light when the two-way optical filter in the narrowband works system, which carries microwave signal, becomes bimodal
Spectral signal, spectral peak corresponding wavelength are respectively λ1And λ2, λ1And λ2Difference on the frequency be modulated signal fm, realize two-way double-frequency resonance.
Further, in the sensing ring interferometer structure, first orthogonal polarisation state adjusts unit and second orthogonal
Polarization state adjusts unit and is realized by several polarization beam apparatus and polarization beat length device.
Further, in the sensing ring interferometer structure, the vertical two paths of signals of polarization state passes in opposite directions in sensing ring
Light velocity when defeated is different, increases sensing ring SAGNAC effect detection gain.
Further, the long adjuster of the first regeneration chamber chamber and the second regeneration long adjuster of chamber chamber are adjusted single as light path
Member, using fiber stretcher, adjustable optical delay line or spatial light displacement platform；The long compensated regulator of chamber is as wide range interferometer
Brachium adjusts unit, using fiber stretcher, adjustable optical delay line or spatial light displacement platform.
Further, which further includes the long control system of chamber, and the long control system of chamber includes that the long adjuster of chamber, chamber are long
Control unit and external clock reference source, the long adjuster of chamber are arranged in two-way ring resonator, the first microwave function
Divide the long control unit of device input cavity, the long control unit of external clock reference source input cavity, the long control unit connection of chamber
The long adjuster of chamber realizes that cavity length of the resonator chamber is stablized.
Further, the long adjuster of the chamber includes the long adjuster of first order chamber and the long adjuster of second level chamber, and described
The adjustable range of the long adjuster of level-one chamber is greater than the long adjuster of second level chamber, and the long adjuster of first order chamber is for adjusting at a slow speed
Chamber is long, and the long adjuster of second level chamber is long for quick adjusting cavity, the long adjuster of the first order chamber and second level chamber is long adjusts
Device is saved as light path and adjusts unit, using fiber stretcher, adjustable optical delay line or spatial light displacement platform.
A method of microwave resonance system, which is carried, using the bi-directional light based on circulator structure carries out angular velocity detection, the party
Method the following steps are included:
Step 1: clockwise work light passes through clockwise direction ring resonator and clockwise direction regenerative mode locking
Structure realizes stable f1 rate-adaptive pacemaker by third microwave power distributor；
Anticlockwise work light passes through counter clockwise direction ring resonator and counter clockwise direction regenerative mode locking structure, leads to
It crosses the second microwave power distributor and realizes stable f2 rate-adaptive pacemaker；
Step 2: clockwise work light and anticlockwise work light generate in sensing ring interferometer structure
Opposite sagnac effect, difference on the frequency, that is, beat frequency of frequency f1 and frequency f2 that difference frequency detection unit detecting step 1 obtains, note
For Δ f；
Step 3: by following formula, can be obtained angular velocity of rotation Ωr
Wherein, S is the area that optical fiber sensing ring surrounds in sensing ring interferometer structure, and λ is frequency f1 or frequency f2 corresponding
Wavelength, L be optical fiber sensing ring total fiber lengths；G1Enter in optical fiber sensing ring for the light that works clockwise, because being divided into
The gain that the vertical two-way sensitivity sagnac effect of polarization state generates；G2Enter optical fiber sensing ring for the light that counterclockwise works
In, because being divided into the gain of the vertical two-way sensitivity sagnac effect generation of polarization state.
Further, when the control system long with chamber of the bi-directional light load microwave resonance system based on circulator structure, warp
The counter clockwise direction microwave frequency f1 and external clock reference source for crossing the distribution of the first microwave power distributor carry out frequency and phase discrimination, output letter
Number by the long control unit of chamber be used for the long adjuster of control chamber, realize counter clockwise direction Resonant Intake System locking；At this point, square clockwise
It is the clockwise direction Resonant Intake System variable quantity before the long locking of chamber and the side counterclockwise before the long locking of chamber to Resonant Intake System variable quantity
To the summation of Resonant Intake System variable quantity.
The invention has the benefit that the present invention combines two-way regenerative mode locking technology and conventional resonance optical gyroscope technology,
It constructs the bi-directional light based on Sagnac effect (Sagnac effect) principle and carries microwave resonance system.The system passes through double
Highly stable microwave oscillation is obtained instead of traditional optical generation to optoelectronic oscillation, and is used for the measurement of angular velocity of rotation；It should
System is compensated using wide range optical interferometer along irreplaceable error two-way counterclockwise, realizes that light carries the two-way of microwave resonance system
Structure reciprocity；Using sensing ring interferometer structure, the signal polarization state for adjusting transmitted in both directions in sensing ring is vertical；The present invention
Advantage be microwave signal difference frequency detection precision can be significantly larger than optical difference frequency detection, the former can pass through amplification frequency multiplication
Difference on the frequency is detected etc. a variety of methods, signal-to-noise ratio is improved, so that the frequency stability of microwave oscillation signal can achieve 10-13；By its
In a direction frequency of oscillation be locked on the higher standard time reference source of stability, such as atomic clock can stablize photoelectricity vibration
The opposite chamber for swinging device is long, eliminates temperature drift and the optics parasitic noise of optic fiber ring-shaped cavity, further increases frequency stability.
Present invention greatly enhances the signal-to-noise ratio of the bi-directional oscillating difference frequency signal as caused by Sagnac effect.System provided by the invention
System and method have the characteristics that practical, measurement accuracy is high, can satisfy the requirement of high-precision optical gyro application.
Detailed description of the invention
Fig. 1 is that the bi-directional light based on circulator structure of one embodiment of the invention carries the composition frame of microwave resonance system
Figure；
Fig. 2 is that the bi-directional light based on circulator structure of another embodiment of the present invention carries the composition frame of microwave resonance system
Figure；
Fig. 3 is the composition block diagram of sensing ring interferometer structure；
In figure, wide spectrum light source 1,50:50 coupler 2, the first wavelength division multiplexer 3, the second wavelength division multiplexer 4, Low speed photo
The long compensated regulator 7 of converter 5, interferometer controller 6, chamber, the first image intensifer 9, the first photoelectricity intensity modulator 10, first
Optical circulator 11, the first photo-coupler 12, the two-way optical filter 13 in narrowband, the long adjuster 14 of first order chamber, second level chamber are long adjusts
Save device 15, the second photo-coupler 16, the second image intensifer 17, the second photoelectricity intensity modulator 18, the second optical circulator 19, the
The long adjuster 20 of one regeneration chamber chamber, the first high-speed photodetector 21, the first microwave filtering amplifying unit 22, the first microwave function point
Device 24, second regenerates the long adjuster 25 of chamber chamber, the second high-speed photodetector 26, the second microwave filtering amplifying unit 27, sensitivity
The long control unit 30 of ring interferometer structure 29, chamber, the first orthogonal polarisation state adjust unit 37, polarization beam apparatus 38, optical fiber sensitivity
Ring 39, the second orthogonal polarisation state adjust unit 40, external clock reference source 45, the second microwave power distributor 46, third microwave function point
Device 47 and difference frequency detection unit 48；Bold portion indicates optical path connection in figure, is light-path；Chain-dotted line indicates that microwave circuit connects
It connects, is electric pathway.
Specific embodiment
Invention is further described in detail in the following with reference to the drawings and specific embodiments.
Embodiment 1
As shown in Figure 1, a kind of bi-directional light based on circulator structure provided in this embodiment carries microwave resonance system, this is
System includes wide spectrum light source, 50:50 coupler, the first wavelength division multiplexer 3, the second wavelength division multiplexer 4, Low speed photo converter 5, does
The long compensated regulator 7 of interferometer controller 6, chamber, the first image intensifer 9, the first photoelectricity intensity modulator 10, the first optical circulator
11, the two-way optical filter 13 in the first photo-coupler 12, narrowband, the second photo-coupler 16, the second image intensifer 17, the second photoelectricity are strong
It is micro- to spend modulator 18, the long adjuster 20 of the second optical circulator 19, first regeneration chamber chamber, the first high-speed photodetector 21, first
Wave filter and amplification unit 22, the long adjuster 25 of the first microwave power distributor 24, second regeneration chamber chamber, the second high-speed photodetector
26, the second microwave filtering amplifying unit 27, sensing ring interferometer structure 29, the second microwave power distributor 46, third microwave power distributor
47 and difference frequency detection unit 48；
First image intensifer 9, the first photoelectricity intensity modulator 10, the long compensated regulator 7 of chamber, the first optical circulator
11, the second wavelength division multiplexer 4, the first photo-coupler 12, the two-way optical filter 13 in narrowband, sensing ring interferometer structure 29, second
Photo-coupler 16, the first wavelength division multiplexer 3 and the second optical circulator 19, which are sequentially connected, constitutes clockwise direction ring resonator；It is suitable
Clockwise harmonic light successively passes through the long adjuster 25 of the first photo-coupler 12, second regeneration chamber chamber, the detection of the second high speed optoelectronic
47 the first photoelectricity of feedback modulation intensity modulator 10 of device 26, the second microwave filtering amplifying unit 27 and third microwave power distributor, structure
At clockwise direction regenerative mode locking structure；The electric signal that clockwise direction regenerative mode locking structure generates passes through third microwave power distributor
47 input difference frequency detection units 48；The long adjuster 25 of the second regeneration chamber chamber adjusts unit as light path, can use optical fiber
The devices such as stretcher, adjustable optical delay line or spatial light displacement platform.
Second image intensifer 17, the second photoelectricity intensity modulator 18, the second optical circulator 19, the first wavelength division multiplexer
3, the two-way optical filter 13 in the second photo-coupler 16, sensing ring interferometer structure 29, narrowband, 12 second wavelength-division of the first photo-coupler
Multiplexer 4 and the first optical circulator 11, which are sequentially connected, constitutes counter clockwise direction ring resonator；Counter clockwise direction harmonic light is successively
It is put by the long adjuster 20 of the second photo-coupler 16, first regeneration chamber chamber, the first high-speed photodetector 21, the first microwave filtering
46 the second photoelectricity of feedback modulation intensity modulator 18 of big unit 22, the first microwave power distributor 24 and the second microwave power distributor is constituted
Counter clockwise direction regenerative mode locking structure；The electric signal that counter clockwise direction regenerative mode locking structure generates passes through the second microwave power distributor 46
Input difference frequency detection unit 48；The long adjuster 20 of the first regeneration chamber chamber adjusts unit as light path, can be drawn using optical fiber
Stretch the devices such as device, adjustable optical delay line or spatial light displacement platform.
The wide spectrum light source 1,50:50 coupler 2, the first wavelength division multiplexer 3, the second wavelength division multiplexer 4, Low speed photo turn
Parallel operation 5, interferometer controller 6 and the long compensated regulator 7 of chamber form the reciprocity error compensation wide spectrum optical along double loop counterclockwise
Interferometer；The light that the wide spectrum light source 1 issues divides through 50:50 coupler 2 for two-arm, and the first arm passes sequentially through the second wavelength-division multiplex
Device 4, the first optical circulator 11, the second image intensifer 17, the second photoelectricity intensity modulator 18, the second optical circulator 19, first wave
Division multiplexer 3,50:50 coupler 2 enter Low speed photo converter 5；Second arm passes sequentially through the first wavelength division multiplexer 3, second
Optical circulator 19, the first image intensifer 9, the first photoelectricity intensity modulator 10, the long compensated regulator 7 of chamber, the first optical circulator 11,
Second wavelength division multiplexer 4,50:50 coupler 2 enter Low speed photo converter 5；The detection of the Low speed photo converter 5 is believed
Number pass through interferometer controller 6, export the long compensated regulator 7 of control chamber, realize wide range optical interferometer two-arm light path it is identical, disappear
Except nonreciprocal error caused by device non-bidirectional in two-arm；The light and harmonic light clockwise and inverse time that the wide spectrum light source 1 issues
Needle harmonic light is not interfered；The long compensated regulator 7 of chamber adjusts unit as wide range interferometer brachium, can be drawn using optical fiber
Stretch the devices such as device, adjustable optical delay line or spatial light displacement platform.
The sensing ring interferometer structure 29 includes that the first orthogonal polarisation state adjusts unit 37, polarization beam apparatus 38, optical fiber
Sensing ring 39 and the second orthogonal polarisation state adjust unit 40；
Clockwise direction harmonic light adjusts unit 37 for the double of the two-way optical filter 13 in narrowband by the first orthogonal polarisation state
It is respectively λ that peak value spectral signal, which is separated into central wavelength,1And λ2, the vertical two ways of optical signals of polarization state, by polarization beam apparatus 38
It is divided into λ1And λ2Two-way enters 39 sensitive angular of optical fiber sensing ring, then closes beam by polarization beam apparatus 38, orthogonal by second
Polarization state realizes that the output signal of sensing ring interferometer structure 29 is consistent with input signal polarization state after adjusting unit 40；
Counter clockwise direction harmonic light adjusts unit 40 for the double of the two-way optical filter 13 in narrowband by the second orthogonal polarisation state
It is respectively λ that peak value spectral signal, which is separated into central wavelength,1And λ2, the vertical two ways of optical signals of polarization state, by polarization beam apparatus 38
It is divided into λ1And λ2Two-way enters 39 sensitive angular of optical fiber sensing ring, then closes beam by polarization beam apparatus 38, orthogonal by first
Polarization state realizes that the output signal of sensing ring interferometer structure 29 is consistent with input signal polarization state after adjusting unit 37.
The bi-directional light based on circulator structure carries microwave resonance system, using clockwise direction regenerative mode locking structure and
The microwave signal input microwave frequency difference detection unit 48 that counter clockwise direction regenerative mode locking structure generates carries out angular velocity detection.
Harmonic light when the two-way optical filter 13 in narrowband works system, which carries microwave signal, becomes bimodal spectrum letter
Number, spectral peak corresponding wavelength is respectively λ1And λ2, λ1And λ2Difference on the frequency be modulated signal fm, realize two-way double-frequency resonance.
In the sensing ring interferometer structure, first orthogonal polarisation state adjusts unit 37 and the second orthogonal polarisation state tune
Saving unit 40 can be realized by several polarization beam apparatus and polarization beat length device.
Light in the sensing ring interferometer structure, when the vertical two ways of optical signals of polarization state is transmitted in opposite directions in sensing ring
It is fast different, increase sensing ring SAGNAC effect detection gain.
Counterclockwise enter the λ transmitted in sensing ring1Wavelength signals and the λ for entering transmission in sensing ring clockwise2
Wavelength signals transmission path is identical, polarization state is vertical；Counterclockwise enter the λ transmitted in sensing ring2Wavelength signals and up time
Needle direction enters the λ transmitted in sensing ring1Wavelength signals transmission path is identical, polarization state is vertical；Realize work suitable, counterclockwise
Make wavelength and the polarization state separation of optical signal；
Optical path difference (phase difference) symbol that resonant cavity is generated by sagnac effect clockwise and counterclockwise is on the contrary, cause
The optical path difference that the one direction sagnac effect that optical path difference clockwise and counterclockwise is twice generates.
The method that microwave resonance system carries out angular velocity detection is carried using the bi-directional light based on circulator structure, including following
Step:
Step 1: the output light of the wide spectrum light source 1 with isolator is divided into after 50:50 coupler 2 carries out power-sharing
Two-way, the first via inject the first wavelength division multiplexer 3, then successively pass through the second optical circulator 19, the first light along clockwise direction
Amplifier 9, the first photoelectricity intensity modulator 10, the long compensated regulator 7 of chamber and the first optical circulator 11, finally via the second wave
Division multiplexer 4 exports；The second wavelength division multiplexer 4 is injected on second tunnel, then successively passes through the first optical circulator in the counterclockwise direction
11, the second image intensifer 17, the second photoelectricity intensity modulator 18 and the second optical circulator 19, finally via the first wavelength division multiplexer
3 outputs；Pass through the same 50:50 coupler by the two-way output signal of the first wavelength division multiplexer 3 and the second wavelength division multiplexer 4
2 couplings return, and interference superposed signal carries out photoelectric conversion by Low speed photo converter 5, feed back via interferometer controller 6
The long compensated regulator 7 of adjusting cavity keeps interferometer two-arm isometric；
Step 2: the output light of the first image intensifer 9 passes through 11 edge of the first photoelectricity intensity modulator 10 and the first optical circulator
Enter common cavity clockwise, the second wavelength division multiplexer 4 is first passed through in common cavity, being divided in the first photo-coupler 12 is two
Road continues through the two-way optical filter 13 in narrowband, sensing ring interferometer structure 29, the second photo-coupler 16, the first wavelength-division all the way
The first image intensifer 9 is reentered after multiplexer 3 and the second optical circulator 19 forms optical cavity；Another way first passes through second again
The raw long adjuster 25 of chamber chamber, then carries out photoelectric conversion by the second high-speed photodetector 26, is sent into the filter of the second microwave later
Wave amplifying unit 27 carries out microwave filtering and amplification, divides through third microwave power distributor 47 for two-way, it is strong to inject the first photoelectricity all the way
It spends modulator 10 and carries out microwave modulation, form regenerative mode locking circuit, export f1 as clockwise resonant microwave all the way；Its
Regenerative mode locking circuit injection the can be changed in middle the second regeneration long adjuster 25 of chamber chamber adjusted before the second high-speed photodetector 26
The microwave phase of one photoelectricity intensity modulator 10 realizes stable f1 rate-adaptive pacemaker；
Step 3: anticlockwise regenerative mode locking principle to clockwise similar, the output light of the second image intensifer 17
Enter common cavity in the counterclockwise direction by the second photoelectricity intensity modulator 18 and the second optical circulator 19, passes through in common cavity
Second photo-coupler 16 divides for two-way, continues through the two-way optical filter 13, first in sensing ring interferometer structure 29, narrowband all the way
The second image intensifer 17 is reentered after photo-coupler 12, the second wavelength division multiplexer 4, the first optical circulator 11, forms optical resonance
Chamber；Another way first passes through the first long adjuster 20 of regeneration chamber chamber, then carries out photoelectricity by the first high-speed photodetector 21 and turns
It changes, is sent into the first microwave filtering amplifying unit 22 later and carries out microwave filtering and amplification, it is micro- through the first microwave power distributor 24, second
It is divided into two-way after wave power splitter 46, injects the second photoelectricity intensity modulator 18 all the way and carry out microwave modulation, forms regenerative mode locking and return
Road exports f2 as anticlockwise resonant microwave all the way；Before wherein adjusting the first high-speed photodetector 21 first again
The microwave phase that the second photoelectricity intensity modulator 18 is injected in regenerative mode locking circuit can be changed in the raw long adjuster 20 of chamber chamber, realizes and stablizes
F2 rate-adaptive pacemaker；
Step 4: clockwise work light and anticlockwise work light produce in sensing ring interferometer structure 29
Raw opposite sagnac effect, difference on the frequency, that is, beat frequency of frequency f1 and frequency f2 that 48 detecting step 1 of difference frequency detection unit obtains,
It is denoted as Δ f；
Step 5: by following formula, can be obtained angular velocity of rotation Ωr
Wherein, S is the area that optical fiber sensing ring surrounds in sensing ring interferometer structure, and λ is frequency f1 or frequency f2 corresponding
Wavelength, L be optical fiber sensing ring total fiber lengths；G1Enter in optical fiber sensing ring for the light that works clockwise, because being divided into
The gain that the vertical two-way sensitivity sagnac effect of polarization state generates；G2Enter optical fiber sensing ring for the light that counterclockwise works
In, because being divided into the gain of the vertical two-way sensitivity sagnac effect generation of polarization state.
Embodiment 2
As shown in Fig. 2, a kind of bi-directional light based on circulator structure provided in this embodiment carries microwave resonance system, in reality
It further include the long control system of chamber on the basis of applying example 1, the long control system of chamber includes the long adjuster of chamber, the long control unit of chamber
30 and external clock reference source 45.
The long adjuster of chamber is arranged in two-way ring resonator, the long control of 24 input cavity of the first microwave power distributor
Unit 30, the long control unit 30 of 45 input cavity of external clock reference source, long 30 connecting cavity of control unit of chamber is long to be adjusted
Device realizes that cavity length of the resonator chamber is stablized.
Further, the long adjuster of the chamber includes the long adjuster 14 of first order chamber and the long adjuster 15 of second level chamber, institute
The adjustable range for stating the long adjuster 14 of first order chamber is greater than the long adjuster 15 of second level chamber, and the long adjuster 14 of first order chamber is used
Long in adjusting cavity at a slow speed, the long adjuster 15 of second level chamber is long for quick adjusting cavity, the long adjuster 14 of first order chamber
Unit is adjusted as light path with the long adjuster 15 of second level chamber, is displaced using fiber stretcher, adjustable optical delay line or spatial light
Platform.
Counter clockwise direction microwave frequency f1 and external clock reference source 45 by the distribution of the first microwave power distributor 24 are carried out
Frequency and phase discrimination, output signal are used for the long adjuster of control chamber by the long control unit 30 of chamber, realize counter clockwise direction Resonant Intake System
Locking；At this point, clockwise direction Resonant Intake System variable quantity is the clockwise direction Resonant Intake System variable quantity and chamber before the long locking of chamber
The summation of counter clockwise direction Resonant Intake System variable quantity before long locking.
Provided verbal description, attached drawing and claims can hold those skilled in the art very much according to the present invention
Easily in the case where not departing from thought and range of condition of the invention defined by claims, a variety of variations and change can be made.
All technical ideas according to the present invention and the substantive any modification carried out to above-described embodiment, equivalent variations, belong to this hair
Bright claim is within the limits of the protection.
Claims (10)
1. a kind of bi-directional light based on circulator structure carries microwave resonance system, which is characterized in that the system includes wide spectrum light source
(1), 50:50 coupler (2), the first wavelength division multiplexer (3), the second wavelength division multiplexer (4), Low speed photo converter (5), interference
Instrument controller (6), the long compensated regulator of chamber (7), the first image intensifer (9), the first photoelectricity intensity modulator (10), first ring of light
Shape device (11), the first photo-coupler (12), the two-way optical filter in narrowband (13), the second photo-coupler (16), the second image intensifer
(17), the second photoelectricity intensity modulator (18), the second optical circulator (19), the first regeneration long adjuster of chamber chamber (20), first high
Fast photodetector (21), the first microwave filtering amplifying unit (22), the first microwave power distributor (24), the second long tune of regeneration chamber chamber
Save device (25), the second high-speed photodetector (26), the second microwave filtering amplifying unit (27), sensing ring interferometer structure
(29), the second microwave power distributor (46), third microwave power distributor (47) and difference frequency detection unit (48)；
First image intensifer (9), the first photoelectricity intensity modulator (10), the long compensated regulator of chamber (7), the first optical circulator
(11), the second wavelength division multiplexer (4), the first photo-coupler (12), the two-way optical filter in narrowband (13), sensing ring interferometer structure
(29), the second photo-coupler (16), the first wavelength division multiplexer (3) and the second optical circulator (19) are sequentially connected composition side clockwise
To ring resonator；Clockwise direction harmonic light successively passes through the first photo-coupler (12), the second regeneration long adjuster of chamber chamber
(25), the second high-speed photodetector (26), the second microwave filtering amplifying unit (27) and third microwave power distributor (47) feedback
The first photoelectricity intensity modulator (10) is modulated, clockwise direction regenerative mode locking structure is constituted；Clockwise direction regenerative mode locking structure
The electric signal of generation passes through third microwave power distributor (47) input difference frequency detection unit (48)；
Second image intensifer (17), the second photoelectricity intensity modulator (18), the second optical circulator (19), the first wavelength-division multiplex
Device (3), the second photo-coupler (16), sensing ring interferometer structure (29), the two-way optical filter in narrowband (13), the first photo-coupler
(12) second wavelength division multiplexers (4) and the first optical circulator (11), which are sequentially connected, constitutes counter clockwise direction ring resonator；Inverse time
Needle direction harmonic light successively passes through the second photo-coupler (16), the first the regeneration long adjuster of chamber chamber (20), the first high-speed light electrical resistivity survey
Survey device (21), the first microwave filtering amplifying unit (22), the first microwave power distributor (24) and the second microwave power distributor (46) feedback
The second photoelectricity intensity modulator (18) is modulated, counter clockwise direction regenerative mode locking structure is constituted；Counter clockwise direction regenerative mode locking structure
The electric signal of generation passes through the second microwave power distributor (46) input difference frequency detection unit (48)；
The wide spectrum light source (1), 50:50 coupler (2), the first wavelength division multiplexer (3), the second wavelength division multiplexer (4), low speed light
Electric transducer (5), interferometer controller (6) and the long compensated regulator of chamber (7) form the reciprocity error along double loop counterclockwise
Compensate wide range optical interferometer；The light that the wide spectrum light source (1) issues is divided into two-arm through 50:50 coupler (2), and the first arm successively leads to
Cross the second wavelength division multiplexer (4), the first optical circulator (11), the second image intensifer (17), the second photoelectricity intensity modulator (18),
Second optical circulator (19), the first wavelength division multiplexer (3), 50:50 coupler (2) enter Low speed photo converter (5)；Second arm
Pass sequentially through the first wavelength division multiplexer (3), the second optical circulator (19), the first image intensifer (9), the first photoelectricity intensity modulator
(10), the long compensated regulator of chamber (7), the first optical circulator (11), the second wavelength division multiplexer (4), 50:50 coupler (2) enter
Low speed photo converter (5)；The detection signal of the Low speed photo converter (5) passes through interferometer controller (6), output control
The long compensated regulator of chamber (7) realizes that the two-arm light path of wide range optical interferometer is identical, eliminates non-caused by non-bidirectional device in two-arm
Reciprocity error；The light that the wide spectrum light source (1) issues is not interfered with harmonic light clockwise and harmonic light counterclockwise；
The sensing ring interferometer structure (29) includes that the first orthogonal polarisation state adjusts unit (37), polarization beam apparatus (38), light
Fine sensing ring (39) and the second orthogonal polarisation state adjust unit (40)；
Clockwise direction harmonic light adjusts unit (37) for the double of the two-way optical filter in narrowband (13) by the first orthogonal polarisation state
Peak value spectral signal is adjusted to the vertical two paths of signals of polarization state, enters optical fiber sensing ring (39) by polarization beam apparatus (38),
Unit (40) successively are adjusted by polarization beam apparatus (38), the second orthogonal polarisation state, and polarization state is recalled into original state；
Counter clockwise direction harmonic light adjusts unit (40) for the double of the two-way optical filter in narrowband (13) by the second orthogonal polarisation state
Peak value spectral signal is adjusted to the vertical two paths of signals of polarization state, enters optical fiber sensing ring (39) by polarization beam apparatus (38),
Unit (37) successively are adjusted by polarization beam apparatus (38), the first orthogonal polarisation state, and polarization state is recalled into original state.
2. a kind of bi-directional light based on circulator structure according to claim 1 carries microwave resonance system, which is characterized in that
The microwave signal input difference frequency detection generated using clockwise direction regenerative mode locking structure and counter clockwise direction regenerative mode locking structure
Unit (48) carries out angular velocity detection.
3. a kind of bi-directional light based on circulator structure according to claim 1 carries microwave resonance system, feature exists
In, harmonic light when the two-way optical filter in narrowband (13) works system, which carries microwave signal, becomes bimodal spectral signal,
Spectral peak corresponding wavelength is respectively λ1And λ2, λ1And λ2Difference on the frequency be modulated signal fm, realize two-way double-frequency resonance.
4. a kind of bi-directional light based on circulator structure according to claim 1 carries microwave resonance system, feature exists
In in the sensing ring interferometer structure (29), first orthogonal polarisation state adjusts unit (37) and the second orthogonal polarisation state
Unit (40) are adjusted to be realized by several polarization beam apparatus and polarization beat length device.
5. a kind of bi-directional light based on circulator structure according to claim 1 carries microwave resonance system, which is characterized in that
In the sensing ring interferometer structure (29), light velocity when the vertical two paths of signals of polarization state transmits in opposite directions in sensing ring is not
Together, increase sensing ring SAGNAC effect detection gain.
6. a kind of bi-directional light based on circulator structure according to claim 1 carries microwave resonance system, which is characterized in that
The first regeneration long adjuster of chamber chamber (20) and the second regeneration long adjuster of chamber chamber (25) are as light path adjusting unit, using light
Fine stretcher, adjustable optical delay line or spatial light displacement platform；The long compensated regulator of chamber (7) is used as wide range interferometer brachium tune
Unit is saved, using fiber stretcher, adjustable optical delay line or spatial light displacement platform.
7. a kind of bi-directional light based on circulator structure according to claim 1 carries microwave resonance system, which is characterized in that
The system further includes the long control system of chamber, and the long control system of chamber includes the long adjuster of chamber, the long control unit of chamber (30) and outer
Portion's timing reference input (45), the long adjuster of chamber are arranged in two-way ring resonator, first microwave power distributor (24)
The long control unit of input cavity (30), the long control unit of external clock reference source (45) input cavity (30), the long control of the chamber
The long adjuster of unit (30) connecting cavity realizes that cavity length of the resonator chamber is stablized.
8. a kind of bi-directional light based on circulator structure according to claim 7 carries microwave resonance system, which is characterized in that
The long adjuster of chamber includes the long adjuster of first order chamber (14) and the long adjuster of second level chamber (15), and the first order chamber is long to be adjusted
The adjustable range for saving device (14) is greater than the long adjuster of second level chamber (15), and the long adjuster of first order chamber (14) is used for slow-action
It is long to save chamber, the long adjuster of second level chamber (15) is long for quick adjusting cavity, the long adjuster of first order chamber (14) and the
The long adjuster of secondary chamber (15) adjusts unit as light path, using fiber stretcher, adjustable optical delay line or spatial light displacement platform.
9. a kind of protect a kind of bi-directional light load microwave resonance system progress angle based on circulator structure using described in claim 1
The method of velocity measuring, which is characterized in that method includes the following steps:
Step 1: clockwise work light passes through clockwise direction ring resonator and clockwise direction regenerative mode locking structure,
Stable f1 rate-adaptive pacemaker is realized by third microwave power distributor (47)；
Anticlockwise work light passes through counter clockwise direction ring resonator and counter clockwise direction regenerative mode locking structure, by the
Two microwave power distributors (46) realize stable f2 rate-adaptive pacemaker；
Step 2: clockwise work light and anticlockwise work light generate in sensing ring interferometer structure (29)
Opposite sagnac effect, difference on the frequency, that is, beat frequency of frequency f1 and frequency f2 that difference frequency detection unit (48) detecting step 1 obtains,
It is denoted as Δ f；
Step 3: by following formula, can be obtained angular velocity of rotation Ωr
Wherein, S is the area that optical fiber sensing ring surrounds in sensing ring interferometer structure, and λ is frequency f1 or the corresponding wave of frequency f2
Long, L is total fiber lengths of optical fiber sensing ring；G1Enter in optical fiber sensing ring for the light that works clockwise, because being divided into polarization
The gain that the vertical two-way sensitivity sagnac effect of state generates；G2Enter in optical fiber sensing ring for the light that counterclockwise works, because
It is divided into the gain that the vertical two-way sensitivity sagnac effect of polarization state generates.
10. according to the method described in claim 9, it is characterized in that, when the bi-directional light based on circulator structure carries microwave resonance
When system has chamber long control system, counter clockwise direction microwave frequency f1 by the first microwave power distributor (24) distribution and external
Timing reference input (45) carries out frequency and phase discrimination, and output signal is used for the long adjuster of control chamber by the long control unit of chamber (30), real
Now counter clockwise direction Resonant Intake System locks；At this point, clockwise direction Resonant Intake System variable quantity is the side clockwise before the long locking of chamber
To the summation of the counter clockwise direction Resonant Intake System variable quantity before Resonant Intake System variable quantity and the long locking of chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811290663.6A CN109357672B (en) | 2018-10-31 | 2018-10-31 | Two-way optical carrier microwave resonance system based on circulator structure and method for detecting angular velocity of two-way optical carrier microwave resonance system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811290663.6A CN109357672B (en) | 2018-10-31 | 2018-10-31 | Two-way optical carrier microwave resonance system based on circulator structure and method for detecting angular velocity of two-way optical carrier microwave resonance system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109357672A true CN109357672A (en) | 2019-02-19 |
| CN109357672B CN109357672B (en) | 2020-11-27 |
Family
ID=65343590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811290663.6A Active CN109357672B (en) | 2018-10-31 | 2018-10-31 | Two-way optical carrier microwave resonance system based on circulator structure and method for detecting angular velocity of two-way optical carrier microwave resonance system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109357672B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111504176A (en) * | 2020-04-30 | 2020-08-07 | 浙江大学 | Large optical path closed-loop measurement system based on two-stage actuator structure |
| CN111917476A (en) * | 2020-07-24 | 2020-11-10 | 天津大学 | Linear radio over fiber communication system based on photoelectric oscillator |
| CN112113556A (en) * | 2020-08-28 | 2020-12-22 | 哈尔滨工程大学 | High-sensitivity resonant micro-optical gyroscope based on self-injection frequency locking and detection method thereof |
| CN114552340A (en) * | 2020-11-24 | 2022-05-27 | 中国科学院半导体研究所 | Tunable broadband random photoelectric oscillator |
| CN115268161A (en) * | 2021-04-30 | 2022-11-01 | 华中科技大学 | System and method for realizing phase regeneration with low power consumption |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1382958A (en) * | 2002-06-20 | 2002-12-04 | 北京大学 | Beat frequency detection method for travelling-wave annular resonance cavity of non-mechanical gyro |
| WO2007067823A2 (en) * | 2005-12-09 | 2007-06-14 | Massachusetts Institute Of Technology | A balanced optical-radiofrequency phase detector |
| CN103267521A (en) * | 2013-05-10 | 2013-08-28 | 浙江大学 | Method for detecting angular velocity through adopting one-loop two-way bidirectional resonant optical microwaves |
| CN103267522A (en) * | 2013-05-10 | 2013-08-28 | 浙江大学 | Bidirectional locking frequency switching method for eliminating nonreciprocal error of optical microwave gyroscope |
| CN103278150A (en) * | 2013-05-10 | 2013-09-04 | 浙江大学 | Optical carrier microwave gyroscopic method for detecting angular velocity |
| CN103471579A (en) * | 2013-09-29 | 2013-12-25 | 浙江大学 | Angular velocity detection method adopting two-way full reciprocity coupling optoelectronic oscillator |
| CN107084713A (en) * | 2017-05-26 | 2017-08-22 | 北京交通大学 | Method for measuring angular velocity and device based on optical-electronic oscillator |
| CN108344408A (en) * | 2017-12-19 | 2018-07-31 | 北京交通大学 | Angular velocity measurement device based on tunable optical electrical oscillator |
| CN108614126A (en) * | 2018-05-30 | 2018-10-02 | 北京交通大学 | Angular velocity measurement device and method based on wideband adjustable optical-electronic oscillator |
-
2018
- 2018-10-31 CN CN201811290663.6A patent/CN109357672B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1382958A (en) * | 2002-06-20 | 2002-12-04 | 北京大学 | Beat frequency detection method for travelling-wave annular resonance cavity of non-mechanical gyro |
| WO2007067823A2 (en) * | 2005-12-09 | 2007-06-14 | Massachusetts Institute Of Technology | A balanced optical-radiofrequency phase detector |
| CN103267521A (en) * | 2013-05-10 | 2013-08-28 | 浙江大学 | Method for detecting angular velocity through adopting one-loop two-way bidirectional resonant optical microwaves |
| CN103267522A (en) * | 2013-05-10 | 2013-08-28 | 浙江大学 | Bidirectional locking frequency switching method for eliminating nonreciprocal error of optical microwave gyroscope |
| CN103278150A (en) * | 2013-05-10 | 2013-09-04 | 浙江大学 | Optical carrier microwave gyroscopic method for detecting angular velocity |
| CN103471579A (en) * | 2013-09-29 | 2013-12-25 | 浙江大学 | Angular velocity detection method adopting two-way full reciprocity coupling optoelectronic oscillator |
| CN107084713A (en) * | 2017-05-26 | 2017-08-22 | 北京交通大学 | Method for measuring angular velocity and device based on optical-electronic oscillator |
| CN108344408A (en) * | 2017-12-19 | 2018-07-31 | 北京交通大学 | Angular velocity measurement device based on tunable optical electrical oscillator |
| CN108614126A (en) * | 2018-05-30 | 2018-10-02 | 北京交通大学 | Angular velocity measurement device and method based on wideband adjustable optical-electronic oscillator |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111504176A (en) * | 2020-04-30 | 2020-08-07 | 浙江大学 | Large optical path closed-loop measurement system based on two-stage actuator structure |
| CN111504176B (en) * | 2020-04-30 | 2021-03-30 | 浙江大学 | Large optical path closed-loop measurement system based on two-stage actuator structure |
| CN111917476A (en) * | 2020-07-24 | 2020-11-10 | 天津大学 | Linear radio over fiber communication system based on photoelectric oscillator |
| CN112113556A (en) * | 2020-08-28 | 2020-12-22 | 哈尔滨工程大学 | High-sensitivity resonant micro-optical gyroscope based on self-injection frequency locking and detection method thereof |
| CN112113556B (en) * | 2020-08-28 | 2022-06-24 | 哈尔滨工程大学 | High-sensitivity resonant micro-optical gyroscope based on self-injection frequency locking and detection method thereof |
| CN114552340A (en) * | 2020-11-24 | 2022-05-27 | 中国科学院半导体研究所 | Tunable broadband random photoelectric oscillator |
| CN114552340B (en) * | 2020-11-24 | 2023-09-05 | 中国科学院半导体研究所 | Tunable broadband random photoelectric oscillator |
| CN115268161A (en) * | 2021-04-30 | 2022-11-01 | 华中科技大学 | System and method for realizing phase regeneration with low power consumption |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109357672B (en) | 2020-11-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109357672A (en) | A method of the bi-directional light based on circulator structure carries microwave resonance system and its detection angular speed | |
| US4848910A (en) | Sagnac type optical fiber interferometer system | |
| CN103278150B (en) | A kind of light of detection angle speed carries microwave gyroscope method | |
| CN107084713B (en) | Method for measuring angular velocity and device based on optical-electronic oscillator | |
| US11874113B2 (en) | Bidirectional optical-carrying microwave resonance system based on circulator structure and method for detecting angular velocity by said system | |
| CN104749581B (en) | Polarization multiplexing-based direct detection wind lidar | |
| WO2015043162A1 (en) | Angular velocity detection method adopting bi-directional full reciprocal coupling optoelectronic oscillator | |
| CN108344408B (en) | Angular velocity measuring device based on tunable optoelectronic oscillator | |
| CN102032905B (en) | Optical fiber gyroscope with enhanced slow light effect | |
| CN108614126B (en) | Angular velocity measurement device and method based on wideband adjustable optical-electronic oscillator | |
| CN110530497A (en) | Interference-type optical fiber vibrating sensing demodulating system and method based on optical-electronic oscillator | |
| CN110672137B (en) | Interference type optical fiber vibration sensing system based on wavelength division multiplexing and microwave photon technology | |
| CN102692314A (en) | Apparatus and method for testing power spectral density of frequency noise of laser based on fiber resonator | |
| CN110319828A (en) | A kind of the resonance type optical fiber gyro system and its signal detecting method of bicyclic cavity configuration | |
| CN104950311A (en) | OEO (optoelectronic oscillator) based wide-range and high-precision absolute distance measurement system with self-calibration function | |
| CN115112111A (en) | Single-beam wide-spectrum light source secondary filtering resonant fiber optic gyroscope and closed-loop control method | |
| US11378401B2 (en) | Polarization-maintaining fully-reciprocal bi-directional optical carrier microwave resonance system and angular velocity measurement method thereof | |
| CN103267522B (en) | The two-way frequency locking switching method of microwave gyroscope irreplaceable error is carried for eliminating light | |
| CN114899702A (en) | Laser device offset frequency stabilizing device and method based on optical fiber ring resonator | |
| CN104777376A (en) | Laser amplifier phase noise measurement system | |
| CN109323690A (en) | A kind of method that the full reciprocity bi-directional light of polarization-maintaining carries microwave resonance system and its detects angular speed | |
| CN112129229B (en) | Quasi-distributed displacement measuring device and method based on photoelectric oscillator | |
| CN112332911B (en) | Microwave phase discrimination device and phase locking device based on microwave photon technology | |
| CN105136057A (en) | Fiber grating strain sensing system | |
| CN112129242B (en) | Optical fiber torsion angle measuring device and method based on photoelectric oscillator |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |