Compound semiconductor integrated optical fiber gyro chip

Abstract

The present invention discloses a compound semiconductor integrated optical fibre-optic gyro chip. Its waveguide upper cladding and lower cladding are made up by using double heterojunction or single heterojunction epitaxial material, its substrate is compound semiconductor material, and the internal breakout position of Y branch waveguide is formed into semi-rectangular or semi-elliptical form, its external breakout position adopts fold line or curved line. Between the connected corner position of Y branch waveguide output and horizontal arm and horizontal branch arm a transition structure is added, in said structure the beam is expanded firstly, then the beam is contracted, then said structure is connected with the horizontal branch arm. Said integrated optical chip mainly uses one Y branch waveguide as power divider, and uses two phase modulators, at the same time, uses them as TE / TM mode polarizer. Said phase modulator adopts upper and lower electrodes structure, said upper electrode can be directly covered on the ridge waveguide.

Description

technical field [0001] The invention relates to an optical fiber gyroscope, in particular to a compound semiconductor integrated optical fiber gyroscope chip. Background technique [0002] Fiber optic gyroscopes are widely used in military and civilian applications. The fiber optic gyroscope is the key technology in the development of the next generation of accurate strike weapon technology. In the field of national defense, the precise guidance of missiles, the precise navigation of submarines lurking underwater for a long time, and the stability of artillery and targeting systems of moving tanks are all inseparable. Gyro. In the field of national economy, the precise positioning of engineering surveys, the precise orientation of oil drilling, and the precise control of robot movements also rely on gyroscopes. Even in daily life, people have or will benefit from gyroscopes unconsciously. For example, the aircraft makes passengers feel very stable and comfortable during f...

AI Technical Summary

Problems solved by technology

[0012] The object of the present invention is to provide a kind of compound semiconductor integrated optical fiber gyroscope chip, adopt based on compound semiconductor substrate, overcome some LiNbO 3 Based on the temperature drift of the integrated optical interference fiber optic gyroscope, the radiation resistance and impact resistance are poor, and it is difficult to integrate monolithically.

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