Full polarization-maintaining light path of optical fiber gyroscope

Abstract

A disclosed full polarization-maintaining light path of an optical fiber gyroscope comprises a high polarizing SLD light source, a polarization-maintaining beam splitter, a Y waveguide and a polarization maintaining fiber coil; the high polarizing light source goes through the polarization-maintaining beam splitter and then is input to the Y waveguide; the two tail fibers of the Y waveguide are respectively connected with the two ends of the polarization maintaining fiber coil; and the polarization-maintaining beam splitter is connected with a detector, and is used to perform beam splitting on a light wave signal returned by the Y waveguide, so that the light wave signal returned by the Y waveguide is detected and converted into an electric signal which is resolved by a subsequent resolving circuit. The full polarization-maintaining light path of the optical fiber gyroscope is capable of inhibiting polarization cross-coupling in the whole light path, and thus polarization noise of the optical fiber gyroscope is inhibited, and the precision of the optical fiber gyroscope is improved.

Description

technical field [0001] The invention relates to the technical field of fiber optic gyroscopes, in particular to a full polarization-maintaining optical path of a fiber optic gyroscope. [0002] Background technique [0003] Fiber optic gyroscopes are widely used in various fields due to their advantages of all solid state, no moving parts, high reliability, fast response, flexible structure, high potential precision, wide measurement range, and long service life. Foreign countries have studied fiber optic gyroscopes earlier, and their development and production levels are also relatively high. As early as the end of the last century, Western developed countries led by the United States developed and produced 10-degree precision -4 Order of magnitude high-precision fiber optic gyroscope. my country's development of fiber optic gyroscopes is later than that of foreign countries, and its level is also far behind that of foreign countries. However, as the country attaches gre...

AI Technical Summary

Problems solved by technology

In this scheme, due to the non-polarization-maintaining optical path (single-mode fiber) used in the front-end optical path of the Y waveguide, the polarization state of the light wave cannot be precisely controlled, so the polarization noise caused by polarization cross-coupling will inevitably affect the overall performance of the fiber optic gyroscope.

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