Large-diameter low-driving-voltage two-dimensional electro-optical deflection device

Abstract

The invention discloses a large-diameter low-driving-voltage two-dimensional electro-optical deflection device, which comprises a first-stage electro-optical deflection module, a half-wave plate and asecond-stage electro-optical deflection module, wherein the first-stage electro-optic deflection module comprises a first Ti / Au electrode, a second Ti / Au electrode, a third Ti / Au electrode, a fourthTi / Au electrode and a first PMNT / PLZT ceramic body. The second-stage electro-optic deflection module comprises a fifth Ti / Au electrode, a sixth Ti / Au electrode, a seventh Ti / Au electrode, an eighth Ti / Au electrode and a second PMNT / PLZT ceramic body. The design of the electrodes is ingeniously utilized, and modulation of the whole material to an optical phase is fully utilized, and thus large-range deflection of the light beam is obtained under a low driving voltage.

Description

technical field [0001] The invention belongs to the technical field of laser communication, and in particular relates to a two-dimensional electro-optic deflection device with a large aperture and low driving voltage. Background technique [0002] Compared with traditional microwave communication, laser communication has the advantages of large communication capacity, high transmission rate, strong anti-interference ability, and good confidentiality. It is an important means of high-capacity communication for military and civilian use in the future. In recent years, space laser communication technology has developed rapidly, and demonstration and verification systems for inter-satellite and satellite-ground links have been successfully established at home and abroad. With the urgent need for high-resolution observation technology and high data rate information transmission, it is imminent to establish a laser communication space transmission network. In the laser communicat...

AI Technical Summary

Problems solved by technology

However, due to the long relaxation time of liquid crystal orientation change, the response bandwidth is basically on the order of hundreds of Hz, which makes the application of liquid crystal-based optical phased arrays limited in high-speed beam scanning applications.

[0005] 2) MEMS optical phased array: It was studied in the 1980s, and it can only rotate to adjust the deflection direction of the beam, and does not have the phase modulation function, and the deflection accuracy is poor

However, the waveguide phased array technology has a narrow incident surface, and the received incident light diameter is on the order of microns, which cannot meet the requirements of the laser beam diameter (1-10mm order) in the space optical communication system.

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