Light transceiving integrated device applied to fiber sensing

Abstract

The embodiment of the invention provides a light transceiving integrated device applied to fiber sensing. The light transceiving integrated device comprises a light source, a photoelectric detector, a polarizing beam splitter, a half-wave plate, a Faraday rotator, a reflector and a lens, wherein the polarization state of emergent light emitted by the light source is regulated through the half-wave plate and the Faraday rotator so that the emergent light is changed between parallel transmission light and vertical reflected light; and the emergent light after the polarizing regulation enters tail fibers of polarization maintaining fibers through the polarizing beam splitter, the reflector and the lens, and the emergent light is received through the photoelectric detector and returned from an interferometer sensor. The structure and the light path process can realize integration and encapsulation of discrete components in a single module, reduce the fiber welding point number in a fiber gyro system, eliminate the 6db inherent loss in the conventional system, and improve the reciprocity and stability of a fiber gyro.

Description

Technical field [0001] The invention relates to the field of optical fiber sensing, in particular to an integrated optical transceiver device applied to optical fiber sensing. Background technique [0002] At present, the miniaturization technology of fiber optic gyroscope (FOG) is a high and new technology pursued by many countries and scientific research institutions in the world. The miniaturization technology of fiber optic gyroscope in the existing technology is mainly a compact integrated optical FOG. Types of FOG light sources, detectors, couplers and the key technology of highly integrated connection optical path-transceiver integrated module, naturally become the key to FOG miniaturization. [0003] In the prior art, the light source and detector in the FOG generally realize the optical input and output of the Sagnac interferometer through a 2×2 fiber coupler, but this technical solution has an inherent loss of 6db, and this traditional The optical transceiver structure o...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the light source and the detector in the FOG generally realize the optical input and output of the Sagnac interferometer through a 2×2 fiber coupler, but this technical solution has an inherent loss of 6db, and this traditional The optical transceiver structure also causes the volume of the optical transmitting and receiving device to be too large, and it is difficult to realize the miniaturization of the fiber optic gyroscope.

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