A micro-resonant optical gyroscope based on a multi-turn micro-nano optical fiber three-dimensional resonant cavity

Abstract

The invention discloses a micro-resonant optical gyroscope based on a multi-turn micro-nano optical fiber three-dimensional resonant cavity, which includes a tunable laser, an isolator, a polarization controller, a phase modulator, a micro-nano optical fiber coil, an input tail fiber, and an output end. Pigtail, low refractive index dielectric rod, beam splitter, 1# photodetector, 2# photodetector, 1# lock-in amplifier, signal generator, servo control module, 2# lock-in amplifier and demodulation module. The present invention utilizes a three-dimensional resonant cavity based on multi-turn micro-nano optical fiber as the core sensitive unit of the resonant optical gyroscope, which reduces the cost; in terms of signal detection, the system adopts a unilateral frequency modulation and demodulation scheme, which reduces non-reciprocity While reducing the error, a good linear working area can be obtained. On the other hand, this solution reduces the number of components of the resonant optical gyroscope, reduces the system cost, and reduces the system volume, thereby realizing the low-cost, miniaturized, high-sensitivity, and high-precision design of the resonant optical gyroscope.

Description

technical field [0001] The invention belongs to the technical field of miniaturized resonant optical gyroscope, and in particular relates to a miniature resonant optical gyroscope based on a multi-circle micro-nano optical fiber three-dimensional resonant cavity. Background technique [0002] As an angular velocity sensor, the gyroscope is widely used in the fields of aircraft navigation, missile guidance, ships, submarines and intelligent control, and is an important part of the inertial navigation system. With the rapid development of science and technology, people put forward higher requirements for the performance index of gyroscope. For example, in some fields that require long-term operations such as deep space or deep sea exploration, gyroscopes are required to have low power consumption and high stability; in the fields of small aircraft and missile guidance, gyroscopes are required to have high precision, miniaturization, high In addition, in the fields of intellig...

AI Technical Summary

Problems solved by technology

However, the manufacturing process of the integrated optical waveguide is complex and expensive. At the same time, due to the large loss of the optical waveguide ring resonator and the coupling loss with the optical fiber device, there are still great difficulties in achieving high precision.

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