plc chip and lithium niobate modulator hybrid integrated optical device

Abstract

The invention discloses a PLC chip and lithium niobate modulator hybrid integrated optical device which comprises a polarization-maintaining single-core FA used on the basis of an input light source, a Y-shaped optical splitter chip based on a PLC, a lithium niobate modulator chip, a resonant ring chip based on the PLC, and a PIN photoelectric detector. The input end of the planar light waveguide Y-shaped optical splitter chip is coupled with and attached to the polarization-maintaining single-core FA, and the output end of the Y-shaped optical splitter chip is directly aligned and coupled with one end of the lithium niobate modulator chip. The other end of the lithium niobate modulator chip is directly aligned and coupled with the resonant ring chip based on the PLC. The PIN photoelectric detector is aligned and coupled with the output end of the resonant ring chip based on the PLC through a passive patch process. The polarization-maintaining single-core FA used on the basis of the input light source, the Y-shaped optical splitter chip based on the PLC, the lithium niobate modulator chip, the resonant ring chip based on the PLC and the PIN photoelectric detector are all integrated on a U-shaped substrate through a hybrid integrating technology. The optical device is high in precision and small in size and used for a resonator fiber-optic gyroscope.

Description

technical field [0001] The invention belongs to the technical field of optical fiber sensing and communication, and relates to a hybrid integrated optical device between chips of different substrate materials, in particular to a hybrid integrated optical device for high-precision miniaturized resonant fiber optic gyro. Background technique [0002] The concept of integrated optics is based on the fabrication of optical waveguide components on planar substrates using microlithography, which, like integrated electronics, offers the potential to integrate several functions into the same optical path during mass production, while facilitating Enables miniaturization and reduced optical connections. Therefore, the use of multifunctional integrated optical devices has long been considered a very promising technical approach for the development of gyroscopes. The most typical example of an integrated optical device is an integrated optical modulator, also known as a Y-waveguide mo...

AI Technical Summary

Problems solved by technology

The traditional fiber optic gyroscope optical system is composed of various discrete optical devices, which are connected by optical fiber coupling and fusion splicing. This form of fiber optic gyroscope has cumbersome process steps, complex structural components, and is not easy to install. The stability and reliability of the coupling point and fusion point are poor. , can not meet the growing needs of the inertial system small integration technology

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