Resonant optical gyroscope based on high-K fluoride resonant cavity

Abstract

The invention discloses a resonant optical gyroscope based on a high-K fluoride resonant cavity. The resonant optical gyroscope comprises a laser, a beam splitter, phase modulators, ring-shaped resonators, a triangular prism, a fluoride wedge-shaped cavity, detectors, lock-in amplifiers, a PI circuit, an adder, a high-voltage amplifier, signal generators and an isolator; the PI circuit is used for modulating optical signals to enable physical quantities extracted from signals output from the detector A and B to be capable of reacting the rotation angle of a carrier, and the frequency of the emergent light of a light source and a modulating voltage of the phase modulators can be respectively changed according to the physical quantities, the feedback of an optical path can be realized, and the purpose that the optical paths propagating in the fluoride wedge-shaped cavity clockwise and anti-clockwise are resonant can be realized.

Description

technical field [0001] The invention belongs to the technical field of gyroscopes, and relates to an angular rate measuring device, specifically a method of light transmission in a closed optical path based on the Sagnac effect, which uses a fluoride wedge-shaped cavity and is realized by multi-beam interference A resonant optical gyroscope for measuring angular velocity, specifically a resonant optical gyroscope based on a high-K fluoride resonant cavity. Background technique [0002] As the core component of the inertial navigation system, the gyro-inertial device is used in land, sea, air and space guidance, navigation and control technology fields such as land, sea, air and space guidance, navigation and control technology, as well as satellite attitude Control, camera stabilization, image stabilization, geodetic surveying, resource surveying, robotics, consumer electronics and other industries have a wide range of application backgrounds, and their development is of gre...

AI Technical Summary

Problems solved by technology

Usually, changes in temperature in the environment or changes in external vibrations will cause a relative change in the peak position of the resonance peak corresponding to the polarization eigenstate, thereby causing a frequency difference caused by polarization fluctuations, which will directly affect the gyro rotation. Measurement of Angular Velocity

[0008] In the traditional resonant cavity selection, most of the resonant cavity materials use silicon dioxide, because SiO 2 It has good insulation properties and a stable silicon dioxide-silicon substrate interface. However, due to the low Q value of the resonator made of silicon dioxide, the size can only be on the order of tens of um, which cannot meet the requirements of gyro navigation.

Images