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Method for inhibiting front polarizing noise of Y-wave guide in optical fiber gyro

A technology of fiber optic gyroscope and polarization noise, which is applied in the direction of Sagnac effect gyroscope to achieve the effect of reducing cost, improving output stability, and increasing yield

Inactive Publication Date: 2015-04-22
CHONGQING HUAYU ELECTRIC GRP
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Problems solved by technology

[0005] In view of the prior art, there is no effective method for solving the Y waveguide front polarization noise deficiency, the purpose of the present invention is to provide a method for effectively suppressing the Y waveguide front polarization noise in the fiber optic gyroscope

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  • Method for inhibiting front polarizing noise of Y-wave guide in optical fiber gyro

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Embodiment Construction

[0016] The present invention will be further described in detail below in combination with specific embodiments.

[0017] A method for suppressing front polarization noise of a Y waveguide in a fiber optic gyroscope, comprising the following steps: the Y waveguide adopts a fast-axis polarization mode, that is, in the two polarization modes of light waves emitted by a light source, the polarization mode transmitted along the fast axis is selected as a detection signal to detect the rotation information of the optical fiber loop.

[0018] Principle basis of the present invention is:

[0019] 1. Analysis of Y waveguide front polarization noise:

[0020] see figure 1 , the light wave emitted by the light-emitting area of ​​the light source is partially polarized light, that is, there are two orthogonal polarization modes. The polarization-maintaining fiber is based on a strong birefringence under high stress to maintain the polarization state of the light wave. The polarization-...

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Abstract

The invention provides a method for inhibiting the front polarizing noise of a Y-wave guide in an optical fiber gyro. The method comprises the steps of: using a fast axis polarizing mode (two polarizing modes of light waves emitted by a light source) by the Y-guide wave; selecting the polarizing mode transmitted along the fast axis as a probe signal; and probing rotary information of an optical loop circuit. The method for inhibiting the front polarizing noise of the Y-wave guide in the optical fiber gyro provided by the invention, the performance of the optical fiber gyro is effectively improved. With the adoption of the method for inhibiting the front polarizing noise of the Y-wave guide in the optical fiber gyro provided by the invention, the front polarizing noise of the Y-wave guide of the optical fiber gyro is effectively inhibited, the output stability of the optical fiber gyro is improved, the yield of the optical fiber gyro is improved, and the cost of the optical fiber gyro is lowered.

Description

technical field [0001] The invention relates to a method for suppressing front polarization noise of a Y waveguide in an optical fiber gyroscope. Background technique [0002] The fiber optic gyroscope is a sensitive element based on a fiber optic coil, and the light waves emitted by the laser diode propagate along the fiber in two directions. The change of the light propagation path determines the angular displacement of the sensitive element. Compared with the traditional mechanical gyroscope, the fiber optic gyroscope has the advantages of all solid state, no rotating parts and friction parts, long life, large dynamic range, instant start, simple structure, small size and light weight. Compared with the laser gyroscope, the fiber optic gyroscope has no locking problem, and does not need to precisely process the optical path in the quartz block, so the cost is low. [0003] Foreign countries have studied fiber optic gyroscopes earlier, and their development and productio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C19/72
Inventor 李光辉刘平颜丽华田凤李玲
Owner CHONGQING HUAYU ELECTRIC GRP
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