A fiber optic gyroscope based on dual-wavelength multiplexing structure

Abstract

The invention discloses a fiber gyroscope based on a dual-wavelength complex structure. The fiber gyroscope comprises a light path part and a circuit part, wherein the light path part comprises dual light sources, a coupler, an optical modulator, a fiber ring, a wavelength division multiplexer, a photoelectric detector and a laser detector; the dual light sources comprise a laser light source anda broadband light source which are input into the coupler respectively; the coupler is connected with an optical modulator and a fiber loop in sequence; the coupler is connected with the wavelength division multiplexer; an output end of the wavelength division multiplexer is connected with the laser detector and the photoelectric detector respectively; and output ends of the photoelectric detectorand the laser detector are connected with circuit parts respectively. Through adoption of the fiber gyroscope, the correction function has no limit on the calibration time and temperature, and the scale factor of the fiber gyroscope can be adjusted online. The fiber gyroscope has high scale factor performance stability, and important popularization value.

Description

technical field [0001] The invention relates to the field of light sources, in particular to a fiber optic gyroscope based on a dual-wavelength multiplexing structure. Background technique [0002] As a new sensor device, fiber optic gyro is an inertial navigation instrument widely used in modern aviation, navigation, aerospace and national defense industries. Its development is very important to a country's industry, national defense and other high-tech development. strategic significance. [0003] Compared with laser gyroscopes, fiber optic gyroscopes do not require high-precision processing of optical mirrors, strict sealing of optical cavities, and mechanical bias technology, and can effectively overcome the blocking phenomenon of laser gyroscopes. They have the advantages of simple structure, low price, small size, and weight. Lightweight and other characteristics, from the perspective of marketization, fiber optic gyroscope has the development trend of replacing laser...

AI Technical Summary

Problems solved by technology

[0007] However, the correction scale of the laser light source used in the above method is offline, and its variable is temperature, which can only realize the calibration of temperature, and there is a limitation of the calibration period, the correction function is limited, and the scale factor of the laser gyroscope cannot be corrected in real time.

The existing fiber optic gyroscope needs to detect the device outside the fiber optic gyroscope, not only the test method is complicated, but also the test error is large, and the scale factor cannot be detected in real time

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