Fiber-optic gyroscope resonant cavity chip based on tunable surface plasmon coupler

Abstract

The invention discloses a fiber-optic gyroscope resonant cavity chip based on a tunable surface plasmon coupler. The chip comprises a first embedded polarization maintaining optical fiber and a second polarization maintaining optical fiber, which are used to conduct optical signals and stabilize the polarization state of the optical signals; an embedded curved polarization maintaining optical fiber; and a tunable surface plasmon coupler, which is used to adjust the coupling ratio of resonant cavity and realize single-polarization transmission of optical singles in the resonant cavity. The embedded curved polarization maintaining optical fiber and the tunable surface plasmon coupler form a resonant cavity; and the tunable surface plasmon coupler is a surface plasmon waveguide coupler. The first embedded polarization maintaining optical fiber, the second embedded polarization maintaining optical fiber, and the embedded curved polarization maintaining optical fiber are embedded in the peripheral layer of the tunable surface plasmon coupler and butt-jointed with the tunable surface plasmon coupler. The polarization maintaining optical fibers and the tunable surface plasmon coupler are integrated in a same chip, and the whole solid state of chip is realized, so the resonant cavity is more stable compared with conventional resonant cavity of fiber-optic gyroscope, and polarization noise is eliminated.

Description

technical field [0001] The invention relates to the fields of integrated optical sensing and high-precision inertial navigation, in particular to an optical fiber gyroscope resonant cavity chip. Background technique [0002] The resonant optical gyroscope is one of the important development directions in the gyroscope field. It has the advantages of anti-electromagnetic interference and high sensitivity. It has broad application prospects in high-precision inertial guidance systems. The optical resonant cavity is the core component of the resonant optical gyroscope. The performance directly determines the accuracy and stability of the gyroscope. The gyro optical resonators currently being studied are mainly fiber optic resonators and integrated optical waveguide resonators. Among them, the fiber optic resonators have the advantages of low loss and high definition, but they are not all solid-state. Seriously affect the stability of gyroscope performance, and there is polariza...

AI Technical Summary

Problems solved by technology

[0003] Purpose of the invention: The purpose of the present invention is to provide an all-solid-state, single-polarization, tunable tunable surface plasmon-based Fiber optic gyroscope resonator chip for element coupler

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