Coherent beam combining system and method
A technology of coherent beam combining and beaming, which is applied in the direction of laser devices, semiconductor laser devices, semiconductor lasers, etc., can solve the problems of low coupling efficiency and large volume, and achieve the effect of large diffraction angle, small volume and improved coupling efficiency
Active Publication Date: 2018-10-19
吉光半导体科技有限公司
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[0005] In view of this, the present invention provides a coherent beam combining system and method to solve the problems of low coupling efficiency and large volume of existing coherent beam combining systems
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[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0035] An embodiment of the present invention provides a coherent beam combining system, such as figure 1 As shown, it includes a laser array 1 and a focusing lens 2 , a sub-wavelength grating 3 , a spatial filter 4 and a coupling mirror 5 sequentially located on the optical path of the laser array 1 .
[0036] In this embodiment, the laser array 1 includes a plurality of lasers 10 and a plurality of collimating lenses 11 , and each collimating lens 11 is arra...
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The present invention provides a coherent beam combination system and method, including a laser array, a focusing lens, a sub-wavelength grating, a spatial filter, and a coupling mirror sequentially located on the optical path of the laser array; the laser array is used to emit parallel multi-beam lasers; The focusing lens is used to converge multiple laser beams onto the sub-wavelength grating; the sub-wavelength grating is used to combine multiple laser beams into one beam, and the reflected light of the coupling mirror is divided into multiple beams and fed back to the laser respectively; the spatial filter is used to filter The high-order diffracted light in the synthesized beam transmits the zero-order diffracted light in the synthesized beam; the coupling mirror is used to output part of the zero-order diffracted light and reflect part of the zero-order diffracted light to sub-wavelength raster. Since the coupling efficiency of the subwavelength grating is higher than that of the Damman grating, the coupling efficiency of the system can be improved; and because the period of the subwavelength grating is small and the diffraction angle is large, the volume of the system can be reduced.
Description
technical field [0001] The present invention relates to the technical field of laser beam combining, and more specifically, to a coherent beam combining system and method. Background technique [0002] Because semiconductor lasers have many advantages such as small size, light weight, long life, and high photoelectric conversion efficiency, semiconductor lasers have extensive and important applications in the fields of space communication, remote sensing, laser processing, and military defense. [0003] However, due to the low power and large divergence angle of a single semiconductor laser device, it is necessary to combine the beams output by multiple semiconductor laser devices into one beam through beam combining technology to increase the output power of the laser. Although the existing beam combining technologies include spatial beam combining, waveguide beam combining, spectral beam combining, and coherent beam combining, etc., because the coherent beam combining tech...
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IPC IPC(8): H01S5/40
CPCH01S5/4012
Inventor 佟存柱孙方圆舒世立吴昊汪丽杰彭航宇王立军
Owner 吉光半导体科技有限公司