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Resonant optical gyro based on bottle-shaped micro resonator

A micro-resonator, optical gyroscope technology, applied in Sagnac effect gyroscopes and other directions, can solve the problem that the diameter of the resonator device cannot be made too large, and achieve the effects of light weight, small size and low power consumption

Active Publication Date: 2019-04-16
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is: the resonant cavity is the core component in the resonant optical gyroscope system. In order to meet the miniaturization requirements of the gyro device, the diameter of the resonant cavity device cannot be made too large

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  • Resonant optical gyro based on bottle-shaped micro resonator
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  • Resonant optical gyro based on bottle-shaped micro resonator

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Embodiment Construction

[0041] The present invention will be further described below in conjunction with the drawings and specific embodiments.

[0042] 1) Resonant optical gyro system based on bottle-shaped micro-cavity, such as figure 1 As shown, it includes laser 1, optical isolator 2, polarization controller 3, first fiber splitter 4, A lithium niobate electro-optical phase modulator 5, B lithium niobate electro-optical phase modulator 6, A circulator 7, A coupling system composed of B circulator 8, tapered fiber waveguide 9 and bottle-shaped micro-cavity 10 (i.e. bottle-shaped micro-cavity), A photodetector 11, A lock-in amplifier 12, A signal source 13, B signal source 14 , Servo controller 15, piezoelectric ceramic control unit 16, B photodetector 17, B lock-in amplifier 18. The gyro system uses phase modulation technology to achieve dual-frequency modulation, which greatly reduces the impact of noise on the system; uses PDH frequency stabilization technology to lock and track the resonant freque...

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Abstract

The invention discloses a resonant optical gyro based on a bottle-shaped micro resonator. The resonant optical gyro comprises a laser (1), an optical isolator (2), a polarization controller (3), a first optical fiber beam splitter (4), a lithium niobate electro-optic phase modulator A (5), a lithium niobate electro-optic phase modulator B (6), a circulator A (7), a circulator B (8), a coupling system, a photoelectric detector A (11), a lock-in amplifier A (12), a signal source A (13), a signal source B (14), a servo controller (15), a piezoelectric ceramic control unit (16), a photoelectric detector B (17) and a lock-in amplifier B (18), and the coupling system is formed by a tapered optical fiber waveguide (9) and the bottle-shaped micro resonator (10). The resonant optical gyro is smallin size, light in weight, low in power consumption and capable of achieving tunability, the larger equivalent diameter can be achieved compared with a typical circular, spherical and other-shape microcavities, and the extremely high precision and sensitivity can be achieved.

Description

Technical field [0001] The invention belongs to the technical field of a high-sensitivity resonant optical gyroscope system, and specifically relates to a resonant optical gyroscope based on a bottle-shaped miniature resonant cavity. Background technique [0002] Gyro is a very important type of inertial angular velocity sensor. It is a sensor that realizes the measurement of the rotation angular velocity and attitude angle of the carrier, and is directly related to the overall performance of the inertial measurement system. Compared with traditional mechanical gyroscopes, optical gyroscopes have higher stability and accuracy, and lower cost. At present, due to the requirements of system miniaturization, high sensitivity, high stability and high overload resistance, optical gyroscopes have gradually developed from laser gyroscopes and fiber optic gyroscopes to integrated optical gyroscopes, becoming an indispensable key component of modern navigation instruments. The integrated ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C19/72
CPCG01C19/72
Inventor 王克逸王梦宇沈远杨煜蔡柏林方清华张磊
Owner UNIV OF SCI & TECH OF CHINA