A Resonant Cavity Structure of Optical Gyroscope Based on Resonant Mode Broadening

An optical gyroscope, resonant mode technology, applied in Sagnac effect gyroscopes, gyroscopes/steering sensing devices, instruments, etc., can solve the problem of low sensitivity of resonant optical gyroscopes

Active Publication Date: 2020-10-20
BEIHANG UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0006] 1. Purpose: The purpose of the present invention is to provide a resonant cavity structure for optical gyroscopes based on resonant mode broadening for the problem of low sensitivity of resonant optical gyroscopes

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  • A Resonant Cavity Structure of Optical Gyroscope Based on Resonant Mode Broadening
  • A Resonant Cavity Structure of Optical Gyroscope Based on Resonant Mode Broadening
  • A Resonant Cavity Structure of Optical Gyroscope Based on Resonant Mode Broadening

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Embodiment Construction

[0021] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.

[0022] An optical gyro resonator structure based on resonant mode broadening, such as figure 1 As shown, it is composed of a microring resonator 1, an atomic bubble 2 and a coupling tapered fiber 3; the relationship between them is that the atomic bubble 2 is inserted into the microring resonator 1, and the coupling tapered fiber 3 passes through a high-precision The displacement platform adjusts the distance from the micro-ring resonator to couple light into the micro-ring resonator.

[0023] The microring resonator 1 is a whispering gallery mode resonator mainly composed of silicon dioxide, with 795nm as the input center wavelength, and the cavity length is 50 times the center wavelength;

[0024] Such as figure 2 As shown, the length of the atomic bubble 2 is set to 5 times the central wavelength, and is composed of an alkali metal atomi...

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Abstract

The invention relates to an optical gyroscope resonant cavity structure based on resonant mode broadening. The structure is characterized by comprising a microring resonance cavity, an atomic bubble and a conical coupling fiber, wherein the atomic bubble is inserted into the microring resonance cavity, the conical coupling fiber couples light to the microring resonance cavity by adjusting the distance with the microring resonance cavity through a high-accuracy displacement platform; the microring resonance cavity is an echo wall mode resonance cavity with silicon dioxide as a main body; the atomic bubble comprises alkali metal atom gas and optical coatings, and the optical coatings are applied to the light beam incident surface and the light beam emergent surface of the alkali metal atom gas; the conical coupling fiber comprises two conical lens fibers, one conical lens fiber introduces light beams into the microring resonance cavity, and the other conical lens fiber couples the lightbeam to a detector from the microring resonance cavity. By means of the novel testing mode broadening method, the sensitivity of an integrated resonant gyroscope can be notably improved.

Description

[0001] (1) Technical field [0002] The invention relates to a high-sensitivity resonant optical gyroscope resonant cavity structure, in particular to an optical gyroscope resonant cavity structure based on resonant mode broadening, and belongs to the technical field of resonant optical gyroscopes. [0003] (2) Background technology [0004] The gyroscope is an inertial sensor that measures angular velocity and is known as the "brain" of flight control. The demand for small size and integration while taking into account high precision is becoming more and more urgent. Compared with mechanical rotor gyroscopes, optical gyroscopes have the advantages of high stability, simple structure, low cost, and high precision, and are experiencing the development trend from laser gyroscopes, fiber optic gyroscopes to integrated optical gyroscopes. The substantial reduction in volume and weight of the integrated optical gyroscope is a major improvement for the application in the fields of ae...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C19/72
CPCG01C19/721
Inventor 肖志松张浩李文秀
Owner BEIHANG UNIV
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