Miniaturized optical transmission and reception module for optical fiber sensing

Abstract

The invention provides a miniaturized optical transmission and reception module for optical fiber sensing. The optical transmission and reception module is characterized in that the body of the module adopts tube shell gas tightness package, and comprises a light source chip mounted on a semiconductor chiller in an attaching manner, a micro lens, a branching unit, a photodetector chip, a microstrip circuit and a thermistor; an optical signal emitted from the light source chip is shaped by the micro lens, then enters the branching unit, enters an optical fiber after optical branching, and then is input to an optical modulator and an optical fiber coil; and after returning, the optical signal enters a photodetector after passing through the branching unit and then is converted to an electrical signal to be output. The technical scheme of the invention adopts a chip-level integration technology based on a micro-optical assembly technology; the module has the advantages of high integration, small size, high performance index, good matching ability and the like; by using the module, the size of an optical fiber sensor such as a fiber optic gyroscope can be further reduced, so that the module can be applied to more fields with needs of relatively small-size sensors.

Description

technical field [0001] The invention relates to the field of optical fiber sensing and communication systems, in particular to a miniaturized optical transceiver assembly for optical fiber sensing. Background technique [0002] At present, the domestic optical fiber sensing system based on optical fiber gyroscope has more and more urgent demands for miniaturization, and the method of traditional discrete optical devices cannot achieve the purpose of miniaturization. Although each discrete optical device can be packaged in a miniaturized form, this will increase the cost and reduce the performance of the optical device, and an ideal miniaturization solution cannot be obtained. [0003] In the field of fiber optic sensing represented by fiber optic gyroscopes, the optical devices used, such as light sources, optical splitters, optical modulators, and optical detectors, are all discrete devices. The -FET component is used as a photodetector, and an optical splitter (Coupler / Sp...

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a miniaturized optical fiber sensing optical transceiver assembly to solve the problems of complex hardware structure, large volume, large noise, low precision and difficult process of the above-mentioned existing designers.

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