Light field reconstruction system and method for generating vortex beam through coherent combination of fiber laser

A vortex beam, coherent synthesis technology, applied in optics, optical components, instruments, etc., can solve problems such as disadvantages and less research on light field distribution characteristics, and achieve the effect of light field characterization

Active Publication Date: 2021-01-08
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

However, this technical route for generating vortex beams still has shortcomings in terms of optical field characterization, which leads to less research on the optical field distribution characteristics of vortex beams generated based on fiber laser coherent synthesis, which is not conducive to the further development of this technical route.

Method used

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  • Light field reconstruction system and method for generating vortex beam through coherent combination of fiber laser
  • Light field reconstruction system and method for generating vortex beam through coherent combination of fiber laser
  • Light field reconstruction system and method for generating vortex beam through coherent combination of fiber laser

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Embodiment 1

[0055] refer to figure 1 The invention provides an optical field reconstruction system for coherently combining fiber lasers to generate a vortex beam, including a vortex beam generation subsystem and an optical field reconstruction subsystem.

[0056] The vortex beam generating subsystem includes a seed source 1, a pre-amplifier 2, a fiber beam splitter 3, a phase modulator array 4, an optical fiber amplification module 5, a collimator array 6, a high reflection mirror 7, a beam splitter 8, an array Beam processing module 9 , photodetection module 10 and control system 11 .

[0057] The seed laser output from the seed source 1 is pre-amplified by the pre-amplifier 2 and then transmitted to the fiber splitter 3 . The optical fiber beam splitter 3 has N output ends, the seed laser light output by the seed source 1 is divided into N beams of unit beams by the optical fiber beam splitter 3, and the output ends of each optical fiber beam splitter 3 are respectively connected to a...

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Abstract

The invention provides a light field reconstruction system and method for generating a vortex beam through coherent combination of fiber laser. The system comprises a vortex beam generation subsystemand a light field reconstruction subsystem. The light intensity distribution of a vortex beam generated through coherent combination is obtained according to a detected light intensity signal, and thephase distribution of the vortex beam generated through coherent combination is obtained through calculation at the same time. Therefore, the light field representation of the vortex light beam generated by coherent combination is realized. The optical field reconstruction method for generating the vortex beam based on coherent combination of the fiber laser is compatible with a vortex beam generation system, and generation of the vortex beam and optical field reconstruction for generating the vortex beam based on coherent combination can be realized through one set of system. According to the system and method of the invention, the difficulty of characterizing a vortex beam light field generated by coherent combination of fiber laser in the prior art is overcome.

Description

technical field [0001] The invention relates to the technical field of fiber laser coherent combination, in particular to a light field reconstruction method for generating vortex beams based on fiber laser coherent combination. Background technique [0002] With the rapid development of laser and photonics technology, the generation and control of structured light fields with special spatial distributions of amplitude, phase, polarization and coherence have attracted extensive attention from researchers at home and abroad. As a typical structured light field, the vortex light field with circular intensity distribution, spiral phase structure, and orbital angular momentum has become a hot spot in academic research in recent years, revealing many novel physical phenomena and widely used in free space light. Communication, super-resolution optical imaging, laser processing and manufacturing, optical tweezers and other fields. For the special application scenarios of long-dist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/09G02B27/00
CPCG02B27/0955G02B27/0994G02B27/0927G02B27/0012
Inventor 周朴侯天悦马鹏飞马阎星粟荣涛吴坚李灿刘伟姜曼常琦龙金虎常洪祥王涛张嵩司磊许晓军陈金宝
Owner NAT UNIV OF DEFENSE TECH
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