Electro-optical phased array laser radar based on lithium niobate film

Abstract

The invention discloses an electro-optical phased array laser radar based on a lithium niobate film. The input end of a 1*N optical beam splitter is connected with an external light source. The outputend is connected with a light emitter array through an optical waveguide array and then outputs. An integrated electronic control system is arranged on the optical waveguide array. The 1*N optical beam splitter receives input laser, and the input laser is divided into multiple paths to enter the optical waveguide array. The integrated electronic control system acts on the optical waveguide arrayto perform phase modulation on multiple optical waveguides therein. The optical waveguide array completes light beam transmission and transmits and outputs multiple light beams from the light emitterarray. According to the invention, the electro-optical effect of a lithium niobate material is combined; the phase difference between waveguide modes is changed to regulate the exiting light angle; the high-speed response characteristic of electro-optical modulation is used to realize high-speed scanning of outgoing light beams; and the laser radar has the advantages of convenient design, convenient extension, compact structure and the like.

Description

technical field [0001] The invention relates to a phased array laser radar, in particular to an electro-optical phased array laser radar based on a lithium niobate thin film. Background technique [0002] Lidar uses a moving laser beam to scan and sample the detection target to obtain characteristic quantities such as the position and velocity of the detection target. The optical phased array can realize free-space beam manipulation without moving parts, which makes the optical phased array a Ideal for designing lidars. With the rapid development of silicon-based photonic integration technology, chip-level silicon-based optical waveguide phased array lidar has been widely studied. Since silicon is not an efficient electro-optic material, the current silicon-based optical waveguide phased array lidar is generally The use of thermo-optic phase modulation to achieve the deflection of the emitted beam has a low response speed and cannot achieve ultra-high-speed scanning of the ...

AI Technical Summary

Problems solved by technology

With the rapid development of silicon-based photonic integration technology, chip-level silicon-based optical waveguide phased array lidar has been widely studied. Since silicon is not an efficient electro-optical material, the current silicon-based optical waveguide phased array lidar is generally Using thermo-optic phase modulation to achieve the deflection of the emitted beam, the response speed is low, and it is impossible to realize the ultra-high-speed scanning of the lidar

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