Angular velocity detection system and method based on weak measurement

The angular velocity detection system based on a dual optical resonant cavity design using weak measurement solves the problem of insufficient accuracy of optical gyroscopes in miniaturization and on-chip integration, achieving high-precision angular velocity detection suitable for various working scenarios.

CN121932973BActive Publication Date: 2026-07-03SHANGHAI JIAOTONG UNIV +1
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Patent Information

Application Number
CN202610399688.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-03-30
Publication Date
2026-07-03
Estimated Expiration
2046-03-30

AI Technical Summary

Technical Problem

Optical gyroscopes face challenges in achieving sufficient accuracy for detection requirements during miniaturization and on-chip integration, particularly due to limitations imposed by factors such as structural dimensions, readout noise, and manufacturing errors.

Method used

An angular velocity detection system based on weak measurement is adopted. Through a dual optical resonant cavity design, the initial light is phase-adjusted by a pre-selection module, coupled by a post-selection module, and the light intensity is detected by a detection module. The processor performs data processing to achieve accurate measurement of rotational angular velocity.

Benefits of technology

It significantly improves the sensing performance of integrated optical gyroscopes under miniaturized conditions, enhances the accuracy and precision of angular velocity detection, and enables stable operation in harsh environments.

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Abstract

This application provides an angular velocity detection system and method based on weak measurement, which can be applied to the fields of quantum sensing technology and optical gyroscope technology. The system includes: a laser emitting initial light; a pre-selection module adjusting the phase of two parts of the initial light; a first optical resonant cavity transmitting the first path light along a counterclockwise path; a second optical resonant cavity transmitting the second path light along a clockwise path; a post-selection module coupling the first path light and the first part of the second path light to obtain a first interference light; a detection module detecting the first interference light to obtain a first light intensity; a processor obtaining a linear coefficient based on a predetermined phase, the initial light intensity of the initial light, and a transmission coefficient; and obtaining the rotational angular velocity based on the first light intensity, the linear coefficient, and the predetermined phase. This system uses an optical microcavity as the sensitive unit of the gyroscope, enhancing the sensing performance of the integrated optical gyroscope through weak measurement technology and improving the detection accuracy of the rotational angular velocity.
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