A bidirectional light-borne microwave resonant system based on a circulator structure and a method for detecting angular velocity

Abstract

The invention discloses a resonant system for a bidirectional light carrying microwave based on a circulator structure and a method for detecting an angular velocity thereof. According to the resonantsystem for the bidirectional light carrying microwave based on the circulator structure and the method for detecting the angular velocity thereof, a high-stability light carrying microwave of which polarization states in a forward and reverse direction are perpendicular is generated in an optical fiber ring by utilizing a regenerative mold locking technology, a cavity length control technology and a polarization state separation technology, and the light carrying microwave is used for measuring the rotation angular velocity. The circulator structure is adopted and the resonance of the bidirectional light carrying microwave is realized through a bidirectional regeneration mode locking technology. A reciprocal resonant system for the bidirectional light carrying microwave is achieved basedon a non-reciprocal error elimination technology of a wide-spectrum optical interferometer. The polarization state separation technology is adopted to achieve dual-wavelength separation of optical signals and the vertical polarization state is adopted for opposite transmission in a sensitive ring, so that the detection capability of the sensitive ring is improved. The cavity length control technology is adopted to lock the oscillation frequency of the microwave in one direction to a high-stability standard-time reference source, so that a relative cavity length of the optical resonant cavity is stabilized. The system and the method have the characteristics of high practicability, high measurement precision and the like.

Description

technical field [0001] The invention belongs to the technical field of high-precision optical gyroscopes, and in particular relates to a bidirectional optical-carrying microwave resonant system based on a circulator structure and a method for detecting angular velocity thereof. Background technique [0002] In the field of inertial navigation, the accelerometer is usually used to detect the translational velocity of the carrier, and the gyroscope is used to detect the angular velocity of the carrier. High-precision gyroscopes mainly include mechanical gyroscopes and optical gyroscopes, which are widely used in military, industrial, scientific and other fields. Among them, optical gyroscopes mainly include laser gyroscopes and fiber optic gyroscopes. Although the laser gyroscope has high precision, it has a latch-up effect and high maintenance costs; the interferometric fiber optic gyroscope has defects such as low optical power utilization, temperature error, and parasitic ...

AI Technical Summary

Problems solved by technology

To realize the detection of the Sagnac effect, it is first necessary to realize the clockwise (CW) and counterclockwise (CCW) transmission of the same light source. Due to the limitation of the bidirectional transmission capability of optoelectronic devices, the (CCW) optical resonator characteristics cannot be exactly the same, so the introduction of non-reciprocity error will reduce the accuracy of optical microwave gyroscope

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