Resonant optical gyroscope based on Fano resonance effect

Abstract

The invention provides a resonant optical gyroscope based on the Fano resonance effect, which comprises a coupler C1, a first reflecting unit, a second reflecting unit, a coupler C4, an optical resonant cavity, a coupler C2, a coupler C3, a first photoelectric detector, a second photoelectric detector and a signal processing circuit, wherein the coupler C1 is used for equally dividing a laser beaminto a first laser beam and a second laser beam; the first reflecting unit and the second reflecting unit are respectively used for receiving the first laser beam and the second laser beam; the coupler C4 is used for receiving the first-direction laser beam and the second-direction laser beam, and the first-direction laser beam and the second-direction laser beam are respectively light beams which are formed after the first laser beam and the second laser beam are respectively transmitted by the first reflecting unit and the second reflecting unit; the optical resonant cavity is used for receiving the light beams output by the coupler C4; the couplers C2 and C3 are respectively used for receiving the first-direction laser beam and the second-direction laser beam output by the coupler C4;the first photoelectric detector and the second photoelectric detector are respectively used for receiving the second-direction laser beam and the first-direction laser beam output by the couplers C2and C3 and respectively converting the second-direction laser beam and the first-direction laser beam into electric signals; and the signal processing circuit is used for performing difference operation processing so as to determine the rotation angular velocity of the optical gyroscope. According to the invention, the complexity of an optical gyroscope system is simplified, and the linearity of gyroscope output is improved.

Description

technical field [0001] The present disclosure relates to the technical field of optical sensing and signal detection, in particular to a resonant optical gyroscope based on the Fano resonance effect. Background technique [0002] At present, for optical gyroscopes, the main research direction is how to reduce the size of the device, reduce the manufacturing cost, and improve the integration level. The resonant optical gyro uses the Sagnac effect to detect the rotational angular velocity, which has the advantages of high theoretical precision, easy miniaturization, and anti-vibration. [0003] However, the traditional resonant optical gyroscope detects the rotational angular velocity by detecting the resonant frequency difference of the clockwise and counterclockwise optical paths, which are mainly divided into two types: single-channel locking and double-closed-loop. Usually, a phase modulator is required to modulate the incident light, and complex algorithms are required f...

AI Technical Summary

Problems solved by technology

Therefore, the existing resonant optical gyroscope often has the defects of complex system and high manufacturing cost

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