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A laser phased array multi-beam forming system and method

A phased array, multi-beam technology, applied in optics, nonlinear optics, instruments, etc., can solve the problems of reducing sub-beam efficiency and scanning accuracy, increasing sub-beam width, etc., to achieve multi-beam forming and deflection, accurate Effects of Amplitude and Phase Control

Inactive Publication Date: 2020-03-20
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Description
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  • Application Information

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Problems solved by technology

This method is called the sub-aperture method, but the reduction of the aperture will directly lead to the increase of the width of the sub-beam, thereby reducing the efficiency and scanning accuracy of the sub-beam

Method used

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  • A laser phased array multi-beam forming system and method
  • A laser phased array multi-beam forming system and method
  • A laser phased array multi-beam forming system and method

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Embodiment Construction

[0029] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0030] Such as figure 1Shown is a schematic structural diagram of the liquid crystal optical phased array used in the present invention, the liquid crystal optical phased array includes: an upper glass substrate 11 and a lower glass substrate 17 placed relatively parallel. The upper substrate contains an alignment layer 13 and a transparent and conductive ITO electrode layer. The electrode layer on the upper substrate is used as an array grating electrode 12. The number of grating electrodes is N, and the distance between adjacent electrodes is d. The effective aperture size formed by the grating electrode is D. The lower substrate contains an alignment layer 15 and a transparent and conductive ITO electrode layer, and the electrode layer on the lower substrate serves as a common electrode 16 . A liquid crystal material 14 is filled between...

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Abstract

The invention discloses a laser phased array multi-beam forming method and system. The system specifically includes: a laser, a polarization beam splitter, a beam expander, a first liquid crystal optical phased array, a 4f optical system and a second liquid crystal optical system. phased array. The outgoing laser beam of the laser passes through the polarization beam splitter, the beam expander, the first liquid crystal optical phased array, the 4f optical system and the second liquid crystal optical phased array in sequence; in order to realize the formation and deflection of any multi-beam, the present invention adopts Two liquid crystal optical phased arrays are cascaded, one phased array is used as an amplitude modulator, the other phased array is used as a phase modulator, and the 4f system is used to accurately align the phase shifting units of the two. The invention can realize the formation of any number of beams and random orientation by precisely controlling the amplitude and phase modulation of the liquid crystal optical phased array.

Description

technical field [0001] The invention belongs to the field of laser phase control technology and liquid crystal optoelectronic device technology, and in particular relates to a laser phased array multi-beam forming method and system. Background technique [0002] In recent years, the laser deflection technology based on the phase control system has been developed more and more deeply in the fields of space laser communication and laser radar. The current laser beam deflection technology has two types: mechanical and non-mechanical. The mechanical method is mainly realized by devices such as universal joints. It has slow response speed, low control precision and poor flexibility, and it is difficult to meet the requirements of fast capture and high-precision tracking. , Application requirements of multi-beam control. The non-mechanical method is realized by electronically controlling the laser phased array. Through phase control, precise beam forming and pointing deflection c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/29G02F1/1333
CPCG02F1/1333G02F1/292
Inventor 汪相如吴亮谭庆贵
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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