CN107356267A - A kind of preparation method of Fibre Optic Depolarizer and products thereof and application - Google Patents
A kind of preparation method of Fibre Optic Depolarizer and products thereof and application Download PDFInfo
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- CN107356267A CN107356267A CN201710628145.XA CN201710628145A CN107356267A CN 107356267 A CN107356267 A CN 107356267A CN 201710628145 A CN201710628145 A CN 201710628145A CN 107356267 A CN107356267 A CN 107356267A
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- 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
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Abstract
The invention discloses a kind of preparation method of novel optical fiber depolarizer and products thereof and application, its preparation method to include：The input tail optical fiber for inputting Y waveguide of the tail optical fiber length more than 4.5m is blocked and is divided into the Part I that length is 1.5m and the Part II that length is 3m, and makes wherein length be that 3m Part II is connected with Y waveguide body；The Part II tail optical fiber that the Part I tail optical fiber that length is 1.5m is 3m with length is subjected to main shaft angle in 45 degree to axle welding, obtains Fibre Optic Depolarizer；Prepared Fibre Optic Depolarizer is used for depolarized type optical fibre gyro, full the temperature precision and precision uniformity of depolarized type optical fibre gyro can be improved, and with the beneficial effect for an assembly qualified rate for improving optical fibre gyro.
Description
Technical field
The invention belongs to inertia device fiber-optics gyroscope field, more particularly, to a kind of preparation of Fibre Optic Depolarizer
Method and products thereof and application
Background technology
In the optical fibre gyro using mixed polarisation road, addition depolarizer, which can improve, before Y waveguide is input to sensitive loop
The power stability and wavelength stability of middle optical signal, and reduce the polarization error of gyro.Optical fibre gyro Y waveguide input tail optical fiber
Preceding optics then does Loyt type Fibre Optic Depolarizers, wherein Loyt types if single-mode fiber using Y waveguide input tail optical fiber
Fibre Optic Depolarizer be by length ratio be 1：2nd, two sections of high-birefringence polarisation-maintaining optical fibers that corresponding birefringence main shaft angle is 45 degree are formed；
Existing depolarizer length is 2m+4m.In the assembling process of optical fibre gyro, because depolarized optical fiber is longer, compact-sized, Yi Fa
Raw fiber-optic twist causes depolarized effect to decline because being stressed, and then influences the situation of optical fibre gyro warm precision entirely.
The content of the invention
For the disadvantages described above or Improvement requirement of prior art, the invention provides a kind of preparation method of Fibre Optic Depolarizer
And products thereof and application, its object is to the depolarized effect for improving optical fibre gyro and complete warm precision.
To achieve the above object, according to one aspect of the present invention, there is provided a kind of preparation side of novel optical fiber depolarizer
Method, comprise the following steps：
(1) the input tail optical fiber for inputting Y waveguide of the tail optical fiber length more than 4.5m is blocked to be divided into length for 1.5m first
Divide and length is 3m Part II, and make wherein length be that 3m Part II is connected with Y waveguide body；
(2) it is in 45 the Part II tail optical fiber that the Part I tail optical fiber that length is 1.5m is 3m with length to be carried out into main shaft angle
Degree to axle welding, obtain Fibre Optic Depolarizer.
It is another aspect of this invention to provide that it is based on above-mentioned preparation method, there is provided a kind of Fibre Optic Depolarizer, including Y waveguide,
Part I tail optical fiber and Part II tail optical fiber；Wherein, Part II tail optical fiber is connected with Y waveguide；The length of Part I tail optical fiber is not
Less than 1.09m；There is the angle no more than 45 degree between the Part I tail optical fiber and Part II tail optical fiber.
Fibre Optic Depolarizer length (l provided by the present invention2-l1) >=(waveguide tail optical fiber length+wide spectrum light source decoherence length
Degree), it is coupled to the part of slow axis to suppress the fast axle wave train and is coupled back into fast axle again at waveguide tail optical fiber and the fusion point of fiber optic loop
Interference contrast is rebuild with the wave train；Wherein, l2Refer to Part II tail optical fiber length, l1Refer to Part I tail optical fiber length.
Preferably, above-mentioned Fibre Optic Depolarizer, the length of its Part I tail optical fiber is 1.5m, and the length of Part II tail optical fiber is
The main shaft angle of 3m, Part I tail optical fiber and Part II tail optical fiber is in 45 degree.
According to another aspect of the present invention, there is provided a kind of application of Fibre Optic Depolarizer, closed applied to small size interference formula
Ring optical fibre gyro.
In general, by the contemplated above technical scheme of the present invention compared with prior art, it can obtain down and show
Beneficial effect：
(1) Fibre Optic Depolarizer provided by the invention, the complete decoherence of the wave train of its output signal, reaches depolarized state, and
And output wave be listed in subsequent optical path will not produce contrast reconstruction；According to measured result, when spectrum is ideal Gaussian type, light
The fiber lengths of signal decorrelation are only 0.054m；When spectrum is non-ideal Gaussian, the fiber lengths of optical signal decorrelation
Only 0.33m, greatly improve the small size interference formula closed-loop fiber optic gyroscope of depolarized effect and this Fibre Optic Depolarizer of application
Full temperature precision and precision uniformity；
(2) Fibre Optic Depolarizer provided by the invention, 1.5m optical fiber is reduced on the basis of the depolarized length of traditional 2m+4m
Coil difficulty；The Fibre Optic Depolarizer is applied to small size interference type optical fiber gyroscope, can effectively shorten fiber reel around length, subtract
Small tortuosity stress, there is the beneficial effect for an assembly qualified rate for improving optical fibre gyro.
Brief description of the drawings
Fig. 1 is the principle schematic for the Fibre Optic Depolarizer that embodiment provides；
Fig. 2 is the Fibre Optic Depolarizer that embodiment provides and other depolarized length warm accuracy comparison design sketch entirely.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in each embodiment of invention described below
Conflict can is not formed each other to be mutually combined.
The preparation method for the Fibre Optic Depolarizer that embodiment provides, comprises the following steps：
(1) the input tail optical fiber for inputting Y waveguide of the tail optical fiber length more than 4.5m is blocked to be divided into length for 1.5m first
Divide and length is 3m Part II, and make wherein length be that 3m Part II is connected with Y waveguide body；
(2) it is in 45 the Part II tail optical fiber that the Part I tail optical fiber that length is 1.5m is 3m with length to be carried out into main shaft angle
Degree to axle welding, obtain Fibre Optic Depolarizer.
The Fibre Optic Depolarizer being prepared based on above-mentioned preparation method, including Y waveguide, Part I tail optical fiber and Part II
Tail optical fiber；Wherein, Part II tail optical fiber is connected with Y waveguide, and the length of Part I tail optical fiber is 1.5m, the length of Part II tail optical fiber
For 3m, the main shaft angle of Part I tail optical fiber and Part II tail optical fiber is in 45 degree.
Above-mentioned Fibre Optic Depolarizer prepared by embodiment can be applied to small size interference formula closed-loop fiber optic gyroscope, realize gyro
Complete warm precision and uniformity lifting；Comparatively speaking, this Fibre Optic Depolarizer prepared by the present invention, it is depolarized in traditional 2m+4m
1.5m fiber reel is shortened on the basis of length around production degree, assembly difficulty is reduced, an assembly qualified rate can be improved.
In the optical fibre gyro using mixed polarisation road, it can be improved and be input to using addition Fibre Optic Depolarizer before Y waveguide
The power stability and wavelength stability of optical signal in sensitive loop, and reduce the polarization error of optical fibre gyro.To ensure optical fiber
The using effect of depolarizer, the complete decoherence of the output signal wave train of Fibre Optic Depolarizer is on the one hand required, is on the other hand required defeated
Contrast reconstruction will not be produced in subsequent optical path by going out the wave train.
From the point of view of the orthogonal condition of the output wave train and the analysis of contrast reconstruction theory, the present embodiment provides above-mentioned
The depolarized positive effect of Fibre Optic Depolarizer is better than traditional Fibre Optic Depolarizer, uses it for depolarized type optical fibre gyro, may be such that and disappear
Warm precision is improved bias tyre optical fibre gyro entirely, and make it that the consistency of performance of depolarized type optical fibre gyro is more excellent.
The full temperature accuracy comparison design sketch of the Fibre Optic Depolarizer that embodiment provides and the Fibre Optic Depolarizer of other depolarized length
As shown in Figure 2；According to measured result, when spectrum is ideal Gaussian type, the 1.5m+3m provided using embodiment this optical fiber
The depolarized effect of depolarizer is fine, better than the depolarized effect using traditional (2m+4m) length of fibre depolarizer.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, all any modification, equivalent and improvement made within the spirit and principles of the invention etc., all should be included
Within protection scope of the present invention.
Claims (4)
1. a kind of preparation method of Fibre Optic Depolarizer, it is characterised in that comprise the following steps：
(1) the input tail optical fiber for inputting Y waveguide of the tail optical fiber length more than 4.5m is blocked, obtains the Part I tail that length is 1.5m
Fine and length is 3m Part II tail optical fiber, and makes wherein length be that 3m Part II tail optical fiber remains connected to Y waveguide body；
(2) the Part II tail optical fiber that the Part I tail optical fiber that length is 1.5m is 3m with length is subjected to main shaft angle in 45 degree
To axle welding, Fibre Optic Depolarizer is obtained.
A kind of 2. Fibre Optic Depolarizer prepared by the method according to claim 11, it is characterised in that including Y waveguide, first
Divide tail optical fiber and Part II tail optical fiber；The Part II tail optical fiber is connected with Y waveguide；The length of the Part I tail optical fiber is not less than
1.09m。
3. Fibre Optic Depolarizer as claimed in claim 2, it is characterised in that the length of the Part I tail optical fiber is 1.5m, institute
The length for stating Part II tail optical fiber is 3m, and the main shaft angle of the Part I tail optical fiber and Part II tail optical fiber is in 45 degree.
4. a kind of application of Fibre Optic Depolarizer as claimed in claim 2 or claim 3, it is characterised in that applied to interference formula closed loop light
Fine gyro.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710628145.XA CN107356267A (en) | 2017-07-28 | 2017-07-28 | A kind of preparation method of Fibre Optic Depolarizer and products thereof and application |
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| CN201710628145.XA CN107356267A (en) | 2017-07-28 | 2017-07-28 | A kind of preparation method of Fibre Optic Depolarizer and products thereof and application |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112697126A (en) * | 2021-01-28 | 2021-04-23 | 湖北三江航天红峰控制有限公司 | Method for improving performance of depolarizer, depolarizer and hybrid polarization fiber gyroscope |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102269591A (en) * | 2011-05-06 | 2011-12-07 | 苏州光环科技有限公司 | Polarization maintaining/single mode fiber mixedly wound fiber ring |
| CN102878991A (en) * | 2012-10-19 | 2013-01-16 | 重庆华渝电气仪表总厂 | Method for inhibiting front polarizing noise of Y-wave guide in optical fiber gyro |
| CN103674007A (en) * | 2012-09-07 | 2014-03-26 | 中国航空工业第六一八研究所 | Fiber gyroscope depolarization light path design method and fiber gyroscope depolarization light path design system |
| CN104359471A (en) * | 2014-11-26 | 2015-02-18 | 湖北三江航天红峰控制有限公司 | Mixed polarized fiber-optic gyroscope light path and preparation method of depolarizer |
-
2017
- 2017-07-28 CN CN201710628145.XA patent/CN107356267A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102269591A (en) * | 2011-05-06 | 2011-12-07 | 苏州光环科技有限公司 | Polarization maintaining/single mode fiber mixedly wound fiber ring |
| CN103674007A (en) * | 2012-09-07 | 2014-03-26 | 中国航空工业第六一八研究所 | Fiber gyroscope depolarization light path design method and fiber gyroscope depolarization light path design system |
| CN102878991A (en) * | 2012-10-19 | 2013-01-16 | 重庆华渝电气仪表总厂 | Method for inhibiting front polarizing noise of Y-wave guide in optical fiber gyro |
| CN104359471A (en) * | 2014-11-26 | 2015-02-18 | 湖北三江航天红峰控制有限公司 | Mixed polarized fiber-optic gyroscope light path and preparation method of depolarizer |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112697126A (en) * | 2021-01-28 | 2021-04-23 | 湖北三江航天红峰控制有限公司 | Method for improving performance of depolarizer, depolarizer and hybrid polarization fiber gyroscope |
| CN112697126B (en) * | 2021-01-28 | 2022-03-08 | 湖北三江航天红峰控制有限公司 | Method for improving performance of depolarizer, depolarizer and hybrid polarization fiber gyroscope |
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Application publication date: 20171117 |