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Beam combining aperture filling device based on inverse Damman grating

A technology of aperture filling and Damman grating, which is applied in the direction of laser device, semiconductor laser device, diffraction grating, etc., can solve the problems of processing accuracy error, high difficulty of spectral distribution phase plate processing, and affecting beam combining efficiency, etc., to achieve system stability, Simple structure and high beam combining efficiency

Active Publication Date: 2016-01-06
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

However, the processing of the spectral distribution phase plate in this scheme is very difficult, and the processing accuracy error often affects the efficiency of beam combining

Method used

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  • Beam combining aperture filling device based on inverse Damman grating

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Embodiment Construction

[0011] The present invention will be further described below in conjunction with the embodiments and accompanying drawings, but the protection scope of the present invention should not be limited thereby.

[0012] see first figure 1 , figure 1 It is a structural schematic diagram of Embodiment 1 of the beam combining aperture filling device based on the inverse Damman grating. It can be seen from the figure that the coherent laser array beam-combining aperture filling device based on the inverse Damman grating of the present invention is sequentially composed of a coherent laser array 1, a Fourier transform lens 2, and an inverse Damman grating 3 on the same optical axis. The periodic grating writing surface of Damman grating 3 is perpendicular to the optical axis and placed on the back focal plane of the Fourier transform lens 2. The coherent laser array 1 is composed of nine emitting units, each emitting unit All ensure that the output light spots are collimated and parall...

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Abstract

A combined beam aperture filling device based on an inverse Dammann grating is composed of a laser emitting array, a Fourier transform lens and the inverse Dammann grating, wherein the laser emitting array, the Fourier transform lens and the inverse Dammann grating are in the same optical axis. A specific number of related laser beams with the same phase position are combined and filled to form a single laser beam, and the luminance of a laser system is greatly improved. The combined beam aperture filling device based on the inverse Dammann grating has the advantages of being simple in structure, high in efficiency, low in cost, stable, reliable and the like.

Description

technical field [0001] The invention relates to a high-brightness laser system, in particular to a beam-combining aperture filling device of a coherent laser array based on an inverse Damman grating. Background technique [0002] With the development of science and technology and the growth of the national economy, in the fields of industrial manufacturing and national defense, higher and higher requirements are put forward for the power and brightness of laser systems. In addition to improving the output power and brightness of a single laser, coherent beam combining technology can be used to lock the phases of multiple laser emitting units in unison, form interference enhancement on the target surface, and greatly increase the light intensity at the central peak. However, the output spot of the common coherent combination technology is accompanied by side lobes, which wastes part of the power. [0003] In order to solve this problem, in the prior art [1] (see coherent arr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/44G02B5/18H01S5/40H01S3/23
Inventor 周军刘厚康何兵
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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