Laser phased array multi-beam forming system and method

A phased array and 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 Effect of Amplitude and Phase Control

Inactive Publication Date: 2016-11-23
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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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

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  • Laser phased array multi-beam forming system and method
  • Laser phased array multi-beam forming system and method
  • Laser phased array multi-beam forming system and method

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[0031] The present invention will be described in detail below with reference to the drawings and specific embodiments.

[0032] Such as figure 1 Shown is a schematic diagram of the structure 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 that are relatively parallel. The upper substrate contains an orientation layer 13 and a transparent conductive ITO electrode layer. The electrode layer on the upper substrate serves as the 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 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 the two substra...

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Abstract

The invention discloses a laser phased array multi-beam forming system and method. The system specifically comprises a laser, a polarization splitting prism, a beam expander, a first liquid crystal optical phased array, a 4f optical system and a second liquid crystal optical phased array. An outgoing laser beam of the laser sequentially passes through the polarization splitting prism, the beam expander, the first liquid crystal optical phased array, the 4f optical system and the second liquid crystal optical phased array; the mode of cascading the two liquid crystal optical phased arrays is adopted for achieving forming and deflection of any multi-beam, one phased array is adopted as an amplitude modulator, the other phased array is adopted as a phase modulator, and the 4f system is used for precisely aligning phase shifting units of the two phased arrays. The mode of precise control over the amplitudes of the liquid crystal optical phased arrays and phase modulation is adopted, and forming and random pointing of any number of wave beams can be achieved.

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...

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Application Information

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IPC IPC(8): G02F1/29G02F1/1333
CPCG02F1/1333G02F1/292
Inventor 汪相如吴亮谭庆贵
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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