CN107702730A - Method of testing, device, storage medium and the computer equipment of optical fibre gyro - Google Patents
Method of testing, device, storage medium and the computer equipment of optical fibre gyro Download PDFInfo
- Publication number
- CN107702730A CN107702730A CN201710867702.3A CN201710867702A CN107702730A CN 107702730 A CN107702730 A CN 107702730A CN 201710867702 A CN201710867702 A CN 201710867702A CN 107702730 A CN107702730 A CN 107702730A
- Authority
- CN
- China
- Prior art keywords
- polarization
- optical fibre
- maintaining
- fiber
- fibre gyro
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C25/00—Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Gyroscopes (AREA)
Abstract
The present invention relates to a kind of method of testing of optical fibre gyro, device, storage medium and computer equipment, wherein method includes：Obtain the relevant parameter of light source in fiber-optic gyroscope light path, optical fiber fusion welding point, polarization maintaining optical fibre section and the polarizer；Obtain the measurement result of polarization-maintaining fiber coil polarization interference in optical fibre gyro；According to light source, optical fiber fusion welding point, polarization maintaining optical fibre section and the relevant parameter of the polarizer and the measurement result of polarization-maintaining fiber coil polarization interference in light path, the optic path physical model pre-set is run, to obtain the quality parameter of optical fibre gyro.Pass through the method for the present embodiment, can be before high/low temperature actual measurement be carried out to optical fibre gyro, the quality of optical fibre gyro is evaluated and tested, both there can be an assessment in advance to the gyro quality before actual measurement, the reference of actual measurement can also be turned into simultaneously, prevent occurring larger error during actual measurement and can not discover, so as to improve measuring accuracy, ensure that the accuracy of test result.
Description
Technical field
The present invention relates to fiber-optics gyroscope field, more particularly to a kind of method of testing of optical fibre gyro, device, storage
Medium and computer equipment.
Background technology
Interference type optical fiber gyroscope is a kind of angular-rate sensor for inertial navigation, inertial guidance, vehicle location,
Extensive development and application prospect are suffered from many dual-use fields such as lower detection.In actual production and application process
In, due to source degree of polarization fluctuation, the welding point defect in light path between each device tail optical fiber, Y waveguide extinction ratio it is undesirable and
A large amount of polarization interference points present in polarization-maintaining fiber coil, and with the change of ambient temperature, these polarization interference points
Intensity and position can also change therewith so that very important polarization interference error is introduced in polarization maintaining optical fibre gyro light path.
In traditional optical fibre gyro manufacturing process, high-precision height is put into typically by by the optical fibre gyro to complete
Among low-temperature circulating case, under the ambient temperature situations by precise transformation optical fibre gyro, the angle sensor for measuring optical fibre gyro is defeated
Go out, so as to judge influence of the above-mentioned optical defect for whole optical fibre gyro quality.Test period length be present, survey in this method
Try equipment huge factor more (such as temperature control precision, external disturbance interference, circuit system defects expensive, that influence measuring accuracy
Deng), so as to usually require that checking is repeated, it just can guarantee that accurate test result.
The content of the invention
Based on this, it is necessary to for traditional optical fibre gyro test period it is long the problem of, there is provided a kind of survey of optical fibre gyro
Method for testing, device, storage medium and computer equipment.
A kind of method of testing of optical fibre gyro, including：
Obtain the relevant parameter of light source in fiber-optic gyroscope light path, optical fiber fusion welding point, polarization maintaining optical fibre section and the polarizer；
Obtain the measurement result of polarization-maintaining fiber coil polarization interference in optical fibre gyro；
According to the relevant parameter and polarization-maintaining fiber coil of light source in light path, optical fiber fusion welding point, polarization maintaining optical fibre section and the polarizer
The measurement result of polarization interference, the optic path physical model pre-set is run, to obtain the quality parameter of optical fibre gyro.
In one of the embodiments, light source in fiber-optic gyroscope light path, optical fiber fusion welding point, polarization maintaining optical fibre section are obtained and is risen
The relevant parameter of inclined device, including：
By mathematical computations with obtain respectively light source in fiber-optic gyroscope light path, optical fiber fusion welding point, polarization maintaining optical fibre section and rise
The relevant parameter of inclined device.
In one of the embodiments, light source in fiber-optic gyroscope light path, optical fiber fusion welding point, polarization maintaining optical fibre section are obtained and is risen
The relevant parameter of inclined device, including：
Use survey tool directly to detect with obtain light source in fiber-optic gyroscope light path, optical fiber fusion welding point, polarization maintaining optical fibre section with
And the relevant parameter of the polarizer.
In one of the embodiments, the measurement result of polarization-maintaining fiber coil polarization interference in optical fibre gyro is obtained, including：
Obtain the measurement result of the polarization-maintaining fiber coil polarization interference in optical fibre gyro under temperature match curing conditions.
In one of the embodiments, the optic path physical model pre-set, including：
Based on Jones matrix and coherence matrix, light source in light path, optical fiber fusion welding point, polarization maintaining optical fibre are pre-established
The optic path physical model of section, the polarizer and polarization-maintaining fiber coil.
In one of the embodiments, the quality parameter of optical fibre gyro includes the phase mistake as caused by polarization interference under alternating temperature
Poor φeAnd the bias instaility B of optical fibre gyros。
A kind of test device of optical fibre gyro, including：
Parameter acquisition module, for obtaining light source in fiber-optic gyroscope light path, optical fiber fusion welding point, polarization maintaining optical fibre section and being polarized
The relevant parameter of device；
Measurement result acquisition module, for obtaining the measurement result of polarization-maintaining fiber coil polarization interference in optical fibre gyro；
Optic path physical model runs module, for according to light source in light path, optical fiber fusion welding point, polarization maintaining optical fibre section and
The relevant parameter of the polarizer and the measurement result of polarization-maintaining fiber coil polarization interference, run the optic path physics mould pre-set
Type, to obtain the quality parameter of optical fibre gyro.
A kind of computer-readable recording medium, is stored thereon with computer program, and the computer program is executed by processor
Shi Shixian as above steps described in method.
A kind of computer equipment, including memory, processor and storage can be run on a memory and on a processor
Computer program, the as above step described in method is realized during computing device program.
Method of testing, device, storage medium and the computer equipment of above-mentioned optical fibre gyro, by obtaining optical fibre gyro light
The polarization interference of the relevant parameter of each device and polarization-maintaining fiber coil in road, and the optic path physical model by pre-setting
To obtain the quality parameter of optical fibre gyro, so as to optical fibre gyro carry out high/low temperature actual measurement before, to optical fibre gyro
Quality is evaluated and tested, and can both have an assessment in advance to the gyro quality before actual measurement, while can also turn into the reference of actual measurement, is prevented
Occur larger error during only surveying and can not discover, and then improve measuring accuracy, ensure that the accuracy of test result.
Brief description of the drawings
Fig. 1 is the light path schematic diagram of optical fibre gyro in one embodiment；
Fig. 2 is the schematic flow sheet of the method for testing of optical fibre gyro in one embodiment；
Fig. 3 is the testing result figure for carrying out polarization interference in one embodiment to polarization-maintaining fiber coil；
Fig. 4 is to model the qualitative data that computing obtains in one embodiment to the optical fibre gyro that four polarization-maintaining fiber coils are formed
List；
Fig. 5 is the qualitative data that the optical fibre gyro modeling actual measurement formed in one embodiment to four polarization-maintaining fiber coils obtains
List；
Fig. 6 be one embodiment in corresponding diagram 4, Fig. 5 lists generation bias instaility curve comparison figure；
Fig. 7 is corresponding diagram 4 in one embodiment, the random walk coefficient curve comparison figure of Fig. 5 lists generation；
Fig. 8 is the test device schematic diagram of optical fibre gyro in one embodiment.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, rather than whole embodiments.
It should be noted that the embodiment of the present invention is by introducing the light path principle of typical interference type optical fiber gyroscope, such as Fig. 1
Shown, the light path of typical interference type optical fiber gyroscope includes light source (super-radiance light emitting diode), photo-detector, coupler, risen
Inclined device, Y waveguide and polarization-maintaining fiber coil, wherein a1, a2, a3, b1, b2 represent the fusion point between each device tail optical fiber, m1, m2, m3
Represent the fusion point inside Y waveguide integrated optics chip.δiAnd δi+1Represent respectively i-th and i+1 welding in polarization-maintaining fiber coil
Point, Δ LiWith Δ Li+1Polarization-maintaining between expression i-th and i+1 fusion point and between i+1 and the i-th+2 fusion points respectively
The length of tail optical fiber.
The light for considering to send from actual light source is partial poolarized light, and the fusion point in light path between each device tail optical fiber is present
To axle angular error so that polarization interference phenomenon will occur at optical signal transmission to fusion point.Even if optical signal passes through in Y waveguide
The polarizer be polarized after, but because the extinction ratio of the polarizer is unsatisfactory, this polarization interference can still be present.When optical signal exists
When being propagated in polarization-maintaining fiber coil, due to reasons such as technique or extraneous factors, there is substantial amounts of random point in polarization-maintaining fiber coil
The polarization interference point of cloth, multiple spot coupling or multiple coupling phenomenon can occur when passing through these crosstalk points for optical signal, and work as polarization-maintaining
When fiber birefringence changes with extraneous factors such as temperature, this polarization mode coupling can also change therewith, so as to cause optical fiber
The drift of the output signal of gyro, and then influence precision.
Therefore, in order to analyze influence of the polarization interference error to fiber optic gyroscope performance, the embodiments of the invention provide one kind
The method of testing of optical fibre gyro, as shown in Fig. 2 including：
Step S201, obtain the corresponding of light source in fiber-optic gyroscope light path, optical fiber fusion welding point, polarization maintaining optical fibre section and the polarizer
Parameter.
In the present embodiment, the relevant parameter of light source in light path, optical fiber fusion welding point, polarization maintaining optical fibre section and the polarizer, tool
Body can include：The source degree of polarization of light source, the ovality angle of light source and azimuth etc.；Fusion point and both ends inside Y waveguide
Between polarization-maintaining tail optical fiber and polarization-maintaining fiber coil both ends tail optical fiber to axis error angle etc.；The length of polarization-maintaining tail optical fiber between two fusion points
Degree；Amplitude extinction ratio coefficient of the polarizer etc. in Y waveguide.
Step S202, obtain the measurement result of polarization-maintaining fiber coil polarization interference in optical fibre gyro.
In the present embodiment, polarization-maintaining fiber coil polarization interference in optical fibre gyro can be carried out using polarization interference analyzer
Measurement, with obtain fiber optic loop defect point be accurately positioned and defect size.
Step S203, according to relevant parameter and the guarantor of light source in light path, optical fiber fusion welding point, polarization maintaining optical fibre section and the polarizer
The measurement result of inclined fiber optic loop polarization interference, runs the optic path physical model pre-set, to obtain the product of optical fibre gyro
Matter parameter.
In the present embodiment, according to above-mentioned steps obtain light path in light source, optical fiber fusion welding point, polarization maintaining optical fibre section and rise
The inclined relevant parameter of device and the measurement result of polarization-maintaining fiber coil polarization interference, run the optic path physical model pre-set,
To obtain the quality parameter of optical fibre gyro.Specifically, the quality parameter of optical fibre gyro is included under alternating temperature as caused by polarization interference
Phase error phieAnd the bias instaility B of optical fibre gyros。
In one embodiment, light source, optical fiber fusion welding point, polarization maintaining optical fibre section and the polarizer in fiber-optic gyroscope light path are obtained
Relevant parameter, can specifically include：Obtain light source in fiber-optic gyroscope light path, optical fiber fusion welding point, guarantor respectively by mathematical computations
The relevant parameter of inclined fiber segment and the polarizer.In actual applications, it is unfixed or not that some device relevant parameters can be run into
Know (such as supplier can not provide data), therefore, be readily modified as directly carrying out using survey tool such as polarization interference analyzer
Detection obtains respectively.
In one embodiment, the measurement result of polarization-maintaining fiber coil polarization interference in optical fibre gyro is obtained, can specifically be wrapped
Include：Obtain the measurement result of the polarization-maintaining fiber coil polarization interference in optical fibre gyro under temperature match curing conditions.In the present embodiment, polarization-maintaining light
Polarization interference inside fine ring can measure acquisition using polarization interference analyzer.It can specifically use by the U.S.
What PXA-1000 (distributed polarization interference analyzer) measurements that General Photonics companies provide obtained, instrument tool
Have fiber optic loop defect point be accurately positioned and defect size detection, the basic function such as birefringence measurement of polarization-maintaining fiber coil.Such as Fig. 3
It show PXA-1000 test schematic diagrams and its measures the location map of polarization interference point in certain polarization-maintaining fiber coil, it is red in figure
Color arrow represents high crosstalk point.
In one embodiment, the optic path physical model pre-set, including：According to Jones matrix and coherence matrix
Based on, the light path for pre-establishing light source in light path, optical fiber fusion welding point, polarization maintaining optical fibre section, the polarizer and polarization-maintaining fiber coil passes
Defeated physical model.
Illustrate the modeling process of optic path physical model below by way of specific embodiment, further to analyze polarization interference
Influence of the error to polarization maintaining optical fibre gyro performance：
For light source：
The light that light source is sent can be handled as the quasi-monochromatic light of partial polarization, so as to the coherence matrix of its output light
It can be represented by such as following formula (1)：
Wherein, IinRepresent the total light intensity of input optical signal；P represents degree of polarization；Represent the side of complete polarized light respectively with ξ
Parallactic angle and ovality angle.In the present embodiment, above parameter can be measured by pertinent instruments.
For fusion point：
Exist in view of the fusion point between each device polarization-maintaining tail optical fiber of optical fibre gyro in practice to axle angular error, and it is right
Axle angular error is controllable within the specific limits, therefore, will be sent out when optical signal is propagated through these fusion points in the optical path
Raw polarization mode coupling.Assuming that at fusion point in light path between each device polarization-maintaining tail optical fiber being θ to axis error anglex(x=
A1, a2, a3, b1, b2, m1, m2, m3), then optical signal can be by as follows along the Jones matrix being forward propagated through at fusion point
Formula (2) represents：
Optical signal can be represented along the Jones matrix forward and being inversely propagated through at fusion point by such as following formula (3)：
Wherein, the transposition of the T representing matrixs in formula (3).
For polarization-maintaining tail optical fiber between adjacent fusion point：
Assuming that the length of polarization-maintaining tail optical fiber is l between two adjacent fusion pointsx, such as the length of polarization maintaining optical fibre between a1 points and m1
Spend for la1-m1, the length of polarization-maintaining tail optical fiber is l between a2 points and m2a2-m2, the length of polarization maintaining optical fibre is l between a3 points and m3a3-m3,
Ignore the public phase shift between two orthogonal polarisation states, then the Jones matrix of polarization-maintaining tail optical fiber can be by such as between adjacent two fusion point
Following formula (4) represents：
Jones matrix such as polarization-maintaining tail optical fiber between adjacent two fusion points (a1, m1) is Fa1-m1, between fusion point (a2, m2)
The Jones matrix of polarization-maintaining tail optical fiber is Fa2-m2, the Jones matrix of polarization-maintaining tail optical fiber is F between fusion point (a3, m3)a3-m3。
Wherein, Δ n'(T) represent that the birefringence of polarization maintaining optical fibre under alternating temperature is poor, in practice, due to by external environment temperature
The influence of change is spent, the birefringence of polarization maintaining optical fibre will also change therewith, and its variation relation is：Δ n'(T)=- (5.72e-7) T
(t).λ represents light source works wavelength, and T (t) is represented with time continually changing temperature.
For coupler：
Not ideal enough in view of actual coupler, then to when propagating, the Jones matrix of transmitted light can be by as follows for fairing
Formula (5) represents that coupling the Jones matrix of light can be represented by such as following formula (6)：
When light is inversely propagated, the Jones matrix of transmitted light can be represented by such as following formula (7), couple the Jones matrix of light
It can be represented by such as following formula (8)：
Wherein：I can take 1 and 2, respectively the light splitting coupler in corresponding light source coupler and Y waveguide；γiAnd κiTable respectively
Show the added losses of coupler and actual splitting ratio.
For the polarizer：
Assuming that the amplitude extinction ratio coefficient of the polarizer is ε in Y waveguide, then its Jones matrix can pass through such as following formula (9) table
Show：
For polarization-maintaining fiber coil：
Due to the performance of fiber optic loop be influence interference type optical fiber gyroscope precision an important factor for one of.To polarization-maintaining fiber coil
Speech, in actual winding process, due to the influence of the factors such as fiber-optic twist, stress interference, solid glue technique so that whole polarization-maintaining light
The polarization interference point of substantial amounts of random distribution in fine ring be present.Polarization interference inside polarization-maintaining ring can pass through U.S. General
What PXA-1000 (distributed polarization interference analyzer) measurements that Photonics companies provide obtained, the instrument has fiber optic loop
Defect point be accurately positioned and defect size detection, the basic function such as birefringence measurement of polarization-maintaining fiber coil.It is illustrated in figure 3
PXA-1000 test schematic diagrams and its location map for measuring polarization interference point in certain polarization-maintaining fiber coil, red arrow in figure
Represent high crosstalk point.
Assuming that the different polarization interference point of N number of crosstalk strength in fiber optic loop be present, at the same introduce with ambient temperature change and
The factor Δ n'(T of change), and each polarization interference point is equivalent to fusion point successively, by between each two polarization interference point
Polarization maintaining optical fibre length is equivalent to the polarization maintaining optical fibre length between each two fusion point, and modeling is as follows：
Wherein TCoil_CWAnd TCoil_CCWRepresent optical signal in polarization-maintaining fiber coil along when propagating clockwise and anticlockwise respectively
Transmission matrix.θiAnd θi+1Represent respectively in fiber optic loop i-th and equivalent to axle mistake corresponding to i+1 polarization interference point
Declinate degree.liAnd li+1The distributing position of i-th and i+1 polarization interference point in fiber optic loop in fiber optic loop is represented respectively.ln
Position of last crosstalk point to fiber optic loop end in expression fiber optic loop.L represents the length of fiber optic loop.
For phase-modulator：
When optical signal passes through the phase-modulator in Y waveguide, if it is in phase-modulation possessed by fast axle and slow axis point
Wei not φmfAnd φms, then for the light wave forward transmitted, the Jones matrix of phase-modulator can pass through such as following formula (12)
Represent：
Because the optical signal that transmits in opposite directions is exactly each them in fiber optic loop by the time difference of phase-modulator
Transition time, it is assumed that this time is τ, then for the optical signal inversely transmitted, the Jones matrix of phase-modulator can
To be represented by such as following formula (13)：
In implementation process, when the parameter of device be relatively fixed with it is known in the case of, each device of above modeling
Final data can directly be calculated by given data and obtained in addition to polarization-maintaining fiber coil.But influenceed by ambient temperature,
These parameters may change, so that causing the drift of polarization maintaining optical fibre gyro.Each molding of optical components, which is established, above completes,
The total Jones matrix so entered before Y waveguide can be represented by such as following formula (14)：
Hin=R (θm3)Fa3-m3R(θa3)KiTR(θb1) (14)
In the present embodiment, path when being propagated in the optical path with reference to optical signal, when can obtain optical signal and forward transmitting
Total Jones matrix is：
Wherein, the transposition of T representing matrixs, and by S11,S12,S21,S22Total Jones's square when optical signal is forward propagated is represented respectively
Battle array GCWFour elements.
And optical signal Jones matrix total when inversely transmitting is：
In above formula, pass through T11,T12,T21,T22Total Jones matrix G when light wave is inversely propagated is represented respectivelyCCWFour members
Element.
For polarization maintaining optical fibre gyro：
The transmission matrix of optical signal in light path between light source and detector can be represented by such as following formula (17)：
So as to which the light intensity obtained into photodetector is:
IOut=Tr [GJsourceGH] (18)
The wherein conjugate transposition of H representing matrixs, the diagonal summation algorithm of Tr representing matrixs.
If applying pi/2 phase modulation in phase-modulator, for optical signal when by phase-modulator, it is in fast axle and slowly
The phase-modulation that axle obtains meets following relation：
φmf(t)-φmf(t- τ)=pi/2 (19)
Now the light intensity of polarization maintaining optical fibre gyro system optical output can be represented by such as following formula (20)：
I1=I0+Nsin(φs)-Mcos(φs)
=I0+Ipsin(φs+φe) (20)
Wherein, I0For constant term, IpRepresent that the light intensity caused by interference changes, φeRepresent that phase is missed caused by polarization interference
Difference, φsRepresent phase error caused by Sagnac effects.M, N then represents I respectivelypTwo mold components.
Wherein,
Wherein, in formula (21), (22), (23), (24), (25)AndRespectively
Corresponding T11,T12,T21,T22And S11,S12,S21,S22Conjugate transposition.
Formula (25) gives the primitive formula of polarization maintaining optical fibre gyro light path polarization interference error under alternating temperature.
From formula (20), the phase error phi as caused by polarization interference under alternating temperatureeTo causing polarization maintaining optical fibre gyro zero bias
Stability has direct contribution, this be mainly due to light path system loss, between each device polarization-maintaining tail optical fiber fusion point to shaft angle
Spend error and device is undesirable and optical signal is in the optical path respectively along when forward and inversely propagating, each factor difference concentrates body
Existing result.
According to GJB2426A-2004《Method for testing optical fiber gyroscope》In definition to bias instaility, can be by such as
Following formula (26) calculates under alternating temperature in polarization maintaining optical fibre gyro light path the gyro bias instaility B because of caused by polarization interference errors。
In formula：BsRepresent polarization maintaining optical fibre gyroscope bias instaility, unit for °/h；N is sampling number；For constant multiplier, wherein L, D represents the length and diameter of fiber optic loop respectively,Represent average wavelength of light source, c
Represent the light velocity in vacuum；It is output phase φi(i.e. phase error phi caused by polarization interferencee) average value.
Due to the presence of system light path polarization interference so that light source luminous power changes, and causes photodetector to detect
To luminous power can change, and then the random walk coefficient (RWC) of optical fibre gyro can be had an impact, light path polarizes in addition
Crosstalk can also produce certain influence to average wavelength of light source and spectral width, so as to produce indirect influence to RWC.
So as to calculate influence of the light path polarization interference to RWC by such as following formula (27).
Wherein, kB represents Boltzmann constant, and e represents electron charge, and T represents temperature, and RD represents detector responsivity, R
Detector transimpedance is represented, idark represents detector dark current, and P0 represents to reach detector power,Represent phase bias work
Making a little, c represents the light velocity in vacuum, and L represents the length of fiber optic loop, and D represents the diameter of fiber optic loop,Represent light source average wave
Long, Δ λ represents spectral width.AQ6317C spectroanalysis instrument measure spectrum width variations can be used in the present embodiment, adopted
Optical power change amount is measured with YL3200 hand-held optical power gauges.
In the present embodiment, determination and the polarization maintaining optical fibre of the optical parameter of each device are obtained using mode measured directly
The collection performance of the experimental data of ring is as follows：
Wherein each device optical parameter includes：
Light source：In the present embodiment, including source degree of polarization, the ovality angle of light source and azimuth.Pass through in laboratory
The DOP-101 provided using General Photonics companies of the U.S. is tested source degree of polarization, is surveyed by long-time
Examination, source degree of polarization fluctuate near 0.91；The PolarWiseTM provided using General Photonics companies of the U.S. is (partially
Polarization state synthesis analyzer) light source azimuth angle and ovality angle are tested, the measurement essence at the tool azimuth and oval angle
Spend for 0.25 °, wherein azimuth test result is 0.8021 °, and ovality angle test result is -0.7392 °；
Coupler：Splitting ratio including coupler.By using General Photonics companies of the U.S. in the present embodiment
The branch's Output optical power of coupler two after the ERM-202 testing light sources connection coupler of offer, you can obtain the light splitting of coupler
Than the actual splitting ratio that test obtains coupler is 50.2/49.8；
Y waveguide：Including fusion point inside Y waveguide extinction ratio and Y waveguide and both ends polarization-maintaining tail optical fiber and polarization-maintaining fiber coil two
Hold tail optical fiber between to axis error angle etc..In the present embodiment, Y waveguide extinction ratio can be by using U.S. General
The ERM-202 that Photonics companies provide tests to obtain, test result 55dB；And fusion point and both ends are protected inside Y waveguide
General Photonics public affairs in the U.S. can also be passed through to axis error angle partially between tail optical fiber and polarization-maintaining fiber coil both ends tail optical fiber
The PXA-1000 provided is provided both forward and reverse directions scanning is carried out to a certain characteristic point on polarization maintaining optical fibre, then pass through contrast characteristic's crosstalk
Curve, the corresponding polarization interference intensity of this feature point is obtained, finally further according to polarization interference intensity and between axis error angle
Relation:(wherein, Crosstalk represents the crosstalk strength that crosstalk point introduces to Crosstalk=10lgsin2 θ, and θ is represented by going here and there
Disturb the equivalent to axis error angle of introducing) converting obtains.By testing, the point m3 of Y waveguide interior forward end crosstalk strength in Fig. 1
For -42.33dB, equivalent is 0.44 ° to axis error angle；At Y waveguide fiber two point m1 and m2 crosstalk strength be respectively-
48.57dB and -49.08dB, equivalent error angle is respectively 0.21 ° and 0.20 °；Measure Y waveguide both ends tail optical fiber and certain polarization-maintaining light
The crosstalk strength that fusion point a1 and a2 between the tail optical fiber of fine ring both ends are introduced respectively -35.79dB and -33.65dB, equivalent error
Angle is respectively 0.93 ° and 1.19 °.
It should be noted that above formula and calculating process, are compiled by computer Labview in the present embodiment
Journey computing, so only needing to obtain relevant parameter (measurement obtains or other known ways obtain), it is possible to easily obtain
To the quality evaluation result of optical fibre gyro.
This programme is further illustrated below by way of specific experiment data, is respectively A, B, C, D to numbering in the present embodiment
The optical fibre gyro that four polarization-maintaining fiber coils are formed has carried out the checking of above-mentioned model, by four polarization-maintaining rings respectively at -40 DEG C, -20
DEG C, the polarization interference data measured at 0 DEG C, 20 DEG C, 40 DEG C, 60 DEG C, 80 DEG C are updated to above-mentioned model and calculated, it is assumed that work as light
Source degree of polarization is 0.9, and input light intensity 1, light source coupler and Y waveguide coupler splitting ratio are 0.5:0.5, Y waveguide disappears
Light ratio takes 35dB, and the fusion point between each device polarization-maintaining tail optical fiber takes 1 ° to axis error angle, and each polarization-maintaining tail optical fiber length is 1m,
Light source works wavelength is 1550nm, and simulated temperature is respectively -40 DEG C, -20 DEG C, 0 DEG C, 20 DEG C, 40 DEG C, 60 DEG C, 80 DEG C.To meet
Actual conditions, it is assumed that random floating, polarization maintaining optical fibre birefringence vary with temperature coefficient and take -5.72e- each temperature up and down at itself
When 7, the bias instaility and random walk coefficient value of lower four of alternating temperature (numbering is A, B, C, D respectively) polarization-maintaining fiber coil are calculated
As shown in Fig. 4 tables, wherein Temp represents temperature, unit (DEG C), and Bias represents bias instaility (i.e. Bs), unit (°/h),
RWC represents random walk coefficient, unitFrom the point of view of Fig. 4 result, performance ratios of the polarization-maintaining fiber coil A and B under full temperature
Polarization-maintaining fiber coil C's and D is good, and also better than the latter for polarization-maintaining fiber coil C and polarization-maintaining fiber coil D, the former performance.
Fig. 5 tables are the gyro measured datas formed to 4 fiber optic loops (numbering A, B, C, D).
Fig. 6 and Fig. 7 is two groups of curve maps that Fig. 4 tables and Fig. 5 tables are generated by the fitting of Allan variances and Sim simulation results,
Wherein, Fig. 6 be corresponding diagram 4, Fig. 5 lists generation bias instaility curve comparison figure, the list of upper right corner corresponding diagram 4 in Fig. 6
The curve map of the bias instaility of generation, the curve map of the bias instaility of the big list generation of figure corresponding diagram 5 in Fig. 6.
Fig. 7 be corresponding diagram 4, Fig. 5 lists generation random walk coefficient RWC curve comparison figure, wherein, upper right in Fig. 7
The random walk coefficient RWC of the list of angle corresponding diagram 4 generation curve map, the random walk of the big list generation of figure corresponding diagram 5 in Fig. 7
Coefficients R WC curve map.It can be seen that for polarization maintaining optical fibre gyro, the result calculated by the present embodiment model
It is basically identical with measured result.
, can be right before high/low temperature actual measurement is carried out to optical fibre gyro by the method for testing of the present embodiment optical fibre gyro
The quality of optical fibre gyro is evaluated and tested, and can both have an assessment in advance to the gyro quality before actual measurement, while can also turn into real
The reference of survey, prevent occurring larger error during actual measurement and can not discover, so as to improve measuring accuracy, ensure that test knot
The accuracy of fruit.
The embodiment of the present invention additionally provides a kind of test device of optical fibre gyro, as shown in figure 8, including parameter acquisition module
801st, measurement result acquisition module 802 and optic path physical model operation module 803, wherein, parameter acquisition module 801,
For obtaining light source in fiber-optic gyroscope light path, optical fiber fusion welding point, polarization maintaining optical fibre section and the relevant parameter of the polarizer；Measurement result
Acquisition module 802, for obtaining the measurement result of polarization-maintaining fiber coil polarization interference in optical fibre gyro；Optic path physical model is transported
Row module 803, for the relevant parameter and polarization-maintaining according to light source in light path, optical fiber fusion welding point, polarization maintaining optical fibre section and the polarizer
The measurement result of fiber optic loop polarization interference, the optic path physical model pre-set is run, to obtain the quality of optical fibre gyro
Parameter.
The embodiment of the present invention additionally provides a kind of computer-readable recording medium, is stored thereon with computer program, the meter
Calculation machine program realizes following steps when being executed by processor：Obtain light source, optical fiber fusion welding point, polarization maintaining optical fibre in fiber-optic gyroscope light path
The relevant parameter of section and the polarizer；Obtain the measurement result of polarization-maintaining fiber coil polarization interference in optical fibre gyro；According in light path
Light source, optical fiber fusion welding point, polarization maintaining optical fibre section and the relevant parameter of the polarizer and the measurement result of polarization-maintaining fiber coil polarization interference,
The optic path physical model pre-set is run, to obtain the quality parameter of optical fibre gyro.
In one embodiment, light source, optical fiber fusion welding point, polarization maintaining optical fibre section and the polarizer in fiber-optic gyroscope light path are obtained
Relevant parameter, including：By mathematical computations to obtain light source in fiber-optic gyroscope light path, optical fiber fusion welding point, polarization maintaining optical fibre respectively
The relevant parameter of section and the polarizer.
In one embodiment, light source, optical fiber fusion welding point, polarization maintaining optical fibre section and the polarizer in fiber-optic gyroscope light path are obtained
Relevant parameter, including：Survey tool is used directly to detect to obtain light source in fiber-optic gyroscope light path, optical fiber fusion welding point, polarization-maintaining
The relevant parameter of fiber segment and the polarizer.
In one embodiment, the measurement result of polarization-maintaining fiber coil polarization interference in optical fibre gyro is obtained, including：Obtain
Under temperature match curing conditions in optical fibre gyro polarization-maintaining fiber coil polarization interference measurement result.
In one embodiment, the optic path physical model pre-set, including：According to Jones matrix and coherence matrix
Based on, the light path for pre-establishing light source in light path, optical fiber fusion welding point, polarization maintaining optical fibre section, the polarizer and polarization-maintaining fiber coil passes
Defeated physical model.
In one embodiment, the quality parameter of optical fibre gyro includes the phase error as caused by polarization interference under alternating temperature
φeAnd the bias instaility B of optical fibre gyros。
The embodiment of the present invention additionally provides a kind of computer equipment, including memory, processor and is stored in memory
Computer program that is upper and can running on a processor, following steps are realized during the computing device described program：Obtain light
Light source in fine gyro light path, optical fiber fusion welding point, the relevant parameter of polarization maintaining optical fibre section and the polarizer；Obtain polarization-maintaining in optical fibre gyro
The measurement result of fiber optic loop polarization interference；According to the corresponding of light source in light path, optical fiber fusion welding point, polarization maintaining optical fibre section and the polarizer
The measurement result of parameter and polarization-maintaining fiber coil polarization interference, the optic path physical model pre-set is run, to obtain optical fiber
The quality parameter of gyro.
In one embodiment, light source, optical fiber fusion welding point, polarization maintaining optical fibre section and the polarizer in fiber-optic gyroscope light path are obtained
Relevant parameter, including：By mathematical computations to obtain light source in fiber-optic gyroscope light path, optical fiber fusion welding point, polarization maintaining optical fibre respectively
The relevant parameter of section and the polarizer.
In one embodiment, light source, optical fiber fusion welding point, polarization maintaining optical fibre section and the polarizer in fiber-optic gyroscope light path are obtained
Relevant parameter, including：Survey tool is used directly to detect to obtain light source in fiber-optic gyroscope light path, optical fiber fusion welding point, polarization-maintaining
The relevant parameter of fiber segment and the polarizer.
In one embodiment, the measurement result of polarization-maintaining fiber coil polarization interference in optical fibre gyro is obtained, including：Obtain
Under temperature match curing conditions in optical fibre gyro polarization-maintaining fiber coil polarization interference measurement result.
In one embodiment, the optic path physical model pre-set, including：According to Jones matrix and coherence matrix
Based on, the light path for pre-establishing light source in light path, optical fiber fusion welding point, polarization maintaining optical fibre section, the polarizer and polarization-maintaining fiber coil passes
Defeated physical model.
In one embodiment, the quality parameter of optical fibre gyro includes the phase error as caused by polarization interference under alternating temperature
φeAnd the bias instaility B of optical fibre gyros。
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope that this specification is recorded all is considered to be.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more specific and detailed, but simultaneously
Can not therefore it be construed as limiting the scope of the patent.It should be pointed out that come for one of ordinary skill in the art
Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (9)
- A kind of 1. method of testing of optical fibre gyro, it is characterised in that including：Obtain the relevant parameter of light source in fiber-optic gyroscope light path, optical fiber fusion welding point, polarization maintaining optical fibre section and the polarizer；Obtain the measurement result of polarization-maintaining fiber coil polarization interference in optical fibre gyro；According to relevant parameter and the polarization-maintaining light of light source in the light path, optical fiber fusion welding point, polarization maintaining optical fibre section and the polarizer The measurement result of fine ring polarization interference, the optic path physical model pre-set is run, to obtain the product of the optical fibre gyro Matter parameter.
- 2. the method for testing of optical fibre gyro according to claim 1, it is characterised in that in the acquisition fiber-optic gyroscope light path Light source, optical fiber fusion welding point, the relevant parameter of polarization maintaining optical fibre section and the polarizer, including：By mathematical computations to obtain light source in fiber-optic gyroscope light path, optical fiber fusion welding point, polarization maintaining optical fibre section and the polarizer respectively Relevant parameter.
- 3. the method for testing of optical fibre gyro according to claim 1, it is characterised in that in the acquisition fiber-optic gyroscope light path Light source, optical fiber fusion welding point, the relevant parameter of polarization maintaining optical fibre section and the polarizer, including：Survey tool is used directly to detect to obtain light source in fiber-optic gyroscope light path, optical fiber fusion welding point, polarization maintaining optical fibre section and rise The relevant parameter of inclined device.
- 4. the method for testing of optical fibre gyro according to claim 1, it is characterised in that polarization-maintaining in the acquisition optical fibre gyro The measurement result of fiber optic loop polarization interference, including：Obtain the measurement result of the polarization-maintaining fiber coil polarization interference in optical fibre gyro under temperature match curing conditions.
- 5. the method for testing of optical fibre gyro according to claim 1, it is characterised in that the optic path pre-set Physical model, including：Based on Jones matrix and coherence matrix, pre-establish light source in light path, optical fiber fusion welding point, polarization maintaining optical fibre section, rise The optic path physical model of inclined device and polarization-maintaining fiber coil.
- 6. the method for testing of optical fibre gyro according to claim 1, it is characterised in that the quality parameter of the optical fibre gyro Including the phase error phi as caused by polarization interference under alternating temperatureeAnd the bias instaility B of optical fibre gyros。
- A kind of 7. test device of optical fibre gyro, it is characterised in that including：Parameter acquisition module, for obtaining light source in fiber-optic gyroscope light path, optical fiber fusion welding point, polarization maintaining optical fibre section and the polarizer Relevant parameter；Measurement result acquisition module, for obtaining the measurement result of polarization-maintaining fiber coil polarization interference in optical fibre gyro；Optic path physical model runs module, for according to light source in the light path, optical fiber fusion welding point, polarization maintaining optical fibre section and The measurement result of the relevant parameter of the polarizer and the polarization-maintaining fiber coil polarization interference, run the optic path physics pre-set Model, to obtain the quality parameter of the optical fibre gyro.
- 8. a kind of computer-readable recording medium, is stored thereon with computer program, it is characterised in that the computer program is located Manage and realized when device performs such as the step of any one of claim 1~6 methods described.
- 9. a kind of computer equipment, including memory, processor and storage can be run on a memory and on a processor Computer program, it is characterised in that the side as described in any one of claim 1~6 is realized during the computing device described program The step of method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710867702.3A CN107702730A (en) | 2017-09-22 | 2017-09-22 | Method of testing, device, storage medium and the computer equipment of optical fibre gyro |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710867702.3A CN107702730A (en) | 2017-09-22 | 2017-09-22 | Method of testing, device, storage medium and the computer equipment of optical fibre gyro |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107702730A true CN107702730A (en) | 2018-02-16 |
Family
ID=61174295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710867702.3A Pending CN107702730A (en) | 2017-09-22 | 2017-09-22 | Method of testing, device, storage medium and the computer equipment of optical fibre gyro |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107702730A (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108680151A (en) * | 2018-06-21 | 2018-10-19 | 中国科学院西安光学精密机械研究所 | A kind of open-loop optical fiber gyro |
| CN109141473A (en) * | 2018-08-17 | 2019-01-04 | 北方电子研究院安徽有限公司 | A kind of variable damping MEMS gyro sensitive structure test device |
| CN109631943A (en) * | 2018-12-09 | 2019-04-16 | 西安航天精密机电研究所 | A kind of fiber optic loop evaluation and test module and evaluating system |
| CN109708660A (en) * | 2018-11-13 | 2019-05-03 | 河北汉光重工有限责任公司 | A kind of zero bias test method of big depth dive three axis accelerometer |
| CN110243391A (en) * | 2019-06-03 | 2019-09-17 | 新纳传感系统有限公司 | The crosstalk automatic testing method and automatic test equipment of sensor array |
| CN110987011A (en) * | 2019-12-13 | 2020-04-10 | 西安航天精密机电研究所 | Optical path fusion performance detection method for fiber-optic gyroscope |
| CN111238772A (en) * | 2019-12-31 | 2020-06-05 | 中国航空工业集团公司西安飞机设计研究所 | Optical fiber ring detection device and detection method based on polarization crosstalk principle |
| CN112595307A (en) * | 2020-10-30 | 2021-04-02 | 西安航天精密机电研究所 | Optical path error calculation method for interference type fiber-optic gyroscope |
| CN112710332A (en) * | 2020-12-21 | 2021-04-27 | 株洲菲斯罗克光电技术有限公司 | Method and system for calibrating output power of optical fiber gyroscope |
| CN112710331A (en) * | 2020-12-21 | 2021-04-27 | 株洲菲斯罗克光电技术有限公司 | Optical fiber gyroscope initialization calibration method and system |
| CN113409389A (en) * | 2021-06-04 | 2021-09-17 | 北京自动化控制设备研究所 | Method for detecting end face angle of Y waveguide modulator of fiber-optic gyroscope |
| CN114812616A (en) * | 2022-06-28 | 2022-07-29 | 中国船舶重工集团公司第七0七研究所 | High-precision optical path testing method in optical fiber gyroscope |
| CN113409389B (en) * | 2021-06-04 | 2024-06-11 | 北京自动化控制设备研究所 | Method for detecting end face angle of Y waveguide modulator of fiber-optic gyroscope |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101750418A (en) * | 2009-12-25 | 2010-06-23 | 苏州光环科技有限公司 | Method for improving optical fiber ring quality by utilizing distributed polarization interference detection technology |
| CN102914421A (en) * | 2012-10-19 | 2013-02-06 | 苏州光环科技有限公司 | Method and device for measuring polarization crosstalk in optical double-refraction medium |
| US20140132961A1 (en) * | 2012-11-14 | 2014-05-15 | Daniel A. Tazartes | Fiber optic gyroscope with front end polarizer |
| CN103940588A (en) * | 2014-03-21 | 2014-07-23 | 哈尔滨工程大学 | Polarization fading restraining device and method for optical coherence polarization measurement |
| JP2015524069A (en) * | 2012-06-08 | 2015-08-20 | ザ・ボード・オブ・トラスティーズ・オブ・ザ・リーランド・スタンフォード・ジュニア・ユニバーシティ | Laser-driven optical gyroscope with push-pull modulation |
| CN106556387A (en) * | 2015-09-25 | 2017-04-05 | 北京浦丹光电股份有限公司 | A kind of optical fibre gyro light device matching scheme |
-
2017
- 2017-09-22 CN CN201710867702.3A patent/CN107702730A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101750418A (en) * | 2009-12-25 | 2010-06-23 | 苏州光环科技有限公司 | Method for improving optical fiber ring quality by utilizing distributed polarization interference detection technology |
| JP2015524069A (en) * | 2012-06-08 | 2015-08-20 | ザ・ボード・オブ・トラスティーズ・オブ・ザ・リーランド・スタンフォード・ジュニア・ユニバーシティ | Laser-driven optical gyroscope with push-pull modulation |
| CN102914421A (en) * | 2012-10-19 | 2013-02-06 | 苏州光环科技有限公司 | Method and device for measuring polarization crosstalk in optical double-refraction medium |
| US20140132961A1 (en) * | 2012-11-14 | 2014-05-15 | Daniel A. Tazartes | Fiber optic gyroscope with front end polarizer |
| CN103940588A (en) * | 2014-03-21 | 2014-07-23 | 哈尔滨工程大学 | Polarization fading restraining device and method for optical coherence polarization measurement |
| CN106556387A (en) * | 2015-09-25 | 2017-04-05 | 北京浦丹光电股份有限公司 | A kind of optical fibre gyro light device matching scheme |
Non-Patent Citations (2)
| Title |
|---|
| 李子忠，等: "偏振串扰对光纤陀螺零漂及随机游走影响的研究", 《光学学报》 * |
| 李子忠，等: "消偏光纤陀螺偏振串扰误差分析及实验研究", 《激光与光电子学进展》 * |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108680151A (en) * | 2018-06-21 | 2018-10-19 | 中国科学院西安光学精密机械研究所 | A kind of open-loop optical fiber gyro |
| CN108680151B (en) * | 2018-06-21 | 2023-12-08 | 中国科学院西安光学精密机械研究所 | Open-loop fiber optic gyroscope |
| CN109141473A (en) * | 2018-08-17 | 2019-01-04 | 北方电子研究院安徽有限公司 | A kind of variable damping MEMS gyro sensitive structure test device |
| CN109708660A (en) * | 2018-11-13 | 2019-05-03 | 河北汉光重工有限责任公司 | A kind of zero bias test method of big depth dive three axis accelerometer |
| CN109708660B (en) * | 2018-11-13 | 2022-08-09 | 河北汉光重工有限责任公司 | Zero-bias test method for large-depth submersible triaxial gyroscope |
| CN109631943A (en) * | 2018-12-09 | 2019-04-16 | 西安航天精密机电研究所 | A kind of fiber optic loop evaluation and test module and evaluating system |
| CN110243391A (en) * | 2019-06-03 | 2019-09-17 | 新纳传感系统有限公司 | The crosstalk automatic testing method and automatic test equipment of sensor array |
| CN110243391B (en) * | 2019-06-03 | 2020-11-13 | 新纳传感系统有限公司 | Automatic crosstalk detection method and automatic test equipment for sensor array |
| CN110987011B (en) * | 2019-12-13 | 2021-08-27 | 西安航天精密机电研究所 | Optical path fusion performance detection method for fiber-optic gyroscope |
| CN110987011A (en) * | 2019-12-13 | 2020-04-10 | 西安航天精密机电研究所 | Optical path fusion performance detection method for fiber-optic gyroscope |
| CN111238772A (en) * | 2019-12-31 | 2020-06-05 | 中国航空工业集团公司西安飞机设计研究所 | Optical fiber ring detection device and detection method based on polarization crosstalk principle |
| CN112595307A (en) * | 2020-10-30 | 2021-04-02 | 西安航天精密机电研究所 | Optical path error calculation method for interference type fiber-optic gyroscope |
| CN112595307B (en) * | 2020-10-30 | 2022-09-16 | 西安航天精密机电研究所 | Optical path error calculation method for interference type fiber-optic gyroscope |
| CN112710331A (en) * | 2020-12-21 | 2021-04-27 | 株洲菲斯罗克光电技术有限公司 | Optical fiber gyroscope initialization calibration method and system |
| CN112710332A (en) * | 2020-12-21 | 2021-04-27 | 株洲菲斯罗克光电技术有限公司 | Method and system for calibrating output power of optical fiber gyroscope |
| CN113409389A (en) * | 2021-06-04 | 2021-09-17 | 北京自动化控制设备研究所 | Method for detecting end face angle of Y waveguide modulator of fiber-optic gyroscope |
| CN113409389B (en) * | 2021-06-04 | 2024-06-11 | 北京自动化控制设备研究所 | Method for detecting end face angle of Y waveguide modulator of fiber-optic gyroscope |
| CN114812616A (en) * | 2022-06-28 | 2022-07-29 | 中国船舶重工集团公司第七0七研究所 | High-precision optical path testing method in optical fiber gyroscope |
| CN114812616B (en) * | 2022-06-28 | 2022-09-02 | 中国船舶重工集团公司第七0七研究所 | High-precision optical path testing method in optical fiber gyroscope |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107702730A (en) | Method of testing, device, storage medium and the computer equipment of optical fibre gyro | |
| CN104279959B (en) | A kind of new method of the fine length of use vector network analyzer precise measuring | |
| CN101339093B (en) | Optical fiber ring quality measurement method and its device for optical fibre gyroscope | |
| CN106441353B (en) | A kind of symmetry assessment device of optical fibre gyro ring polarization coupled | |
| CN103743553B (en) | The dual channel optical performance testing device of a kind of integrated waveguide manipulator and polarization crosstalk identification thereof and processing method | |
| CN102538822B (en) | Method for fast testing and calibrating dynamic characteristic of fiber optic gyroscope | |
| CN102889979B (en) | Polarization crosstalk estimation and symmetry estimation method of optical fiber ring | |
| CN108287056B (en) | System and method for evaluating coupling characteristics of optical fiber sensitive ring polarization mode | |
| CN104122423B (en) | The self-compensating device and method of a kind of BGO crystal electro-optic coefficient temperature dependency | |
| CN102183360A (en) | Method and device for detecting polarization extinction ratio of optical polarizer | |
| CN104075705A (en) | Optical fiber gyroscope for improving velocity sensitivity | |
| CN101592551A (en) | A kind of beat length of polarization maintaining optical fiber method of testing and proving installation based on the Sagnac interferometer | |
| CN104296964B (en) | A kind of fiber optic loop reciprocity symmetry is evaluated and compensation method | |
| CN106989904A (en) | A kind of measuring method of polarization maintaining optical fibre extinction ratio | |
| CN104280216B (en) | Dual-channel optical performance simultaneous testing device for Y waveguide device and Y waveguide polarization crosstalk recognizing and processing method thereof | |
| CN104374410A (en) | Measurement device and method for fiber loop fusion point reflection in photonic bandgap fiber gyroscope | |
| CN107314888B (en) | The polarization property measurement method of multi-functional lithium niobate integrated device | |
| CN106452570A (en) | Optical fiber fault detection system and detection method based on optical fiber phase mediation principle | |
| CN100343637C (en) | Optical fibre temperature sensing method and sensor based on SAGNAC interferometer | |
| CN107289922B (en) | Forward and reverse simultaneous measurement device of common-light-path fiber-optic gyroscope ring | |
| CN106441083B (en) | Laser feedback interferometer | |
| CN102914418B (en) | Optical fiber Shupe constant testing device and method thereof | |
| CN104280217B (en) | A kind of Y waveguide dual channel optical device for measuring properties | |
| CN104374549A (en) | Sectional type screening system and method for polarization properties of long polarization maintaining optical fiber | |
| CN103363905A (en) | Polarization-maintaining optical fiber length measuring system and polarization-maintaining optical fiber length measuring method based on spectrum analysis |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180216 |