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Method and device for generating high-power vortex laser

A high-power, vortex technology, applied in the direction of optics, optical components, instruments, etc., can solve the problems of broadband laser dispersion, can not withstand high-power laser, low diffraction efficiency, etc., to solve the problem of dispersion, improve energy utilization, suppress The effect of side lobes

Active Publication Date: 2021-06-18
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although methods such as spatial light modulator, grating method and holography method can flexibly generate vortex beams with different modes, the diffraction efficiency is very low
Most of the above methods use phase optical components, which cannot withstand high-power lasers, and also have the effect of dispersion on broadband lasers
The spiral mirrors currently used, although capable of generating high-power vortex lasers, can only generate one mode

Method used

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  • Method and device for generating high-power vortex laser
  • Method and device for generating high-power vortex laser
  • Method and device for generating high-power vortex laser

Examples

Experimental program
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Effect test

Embodiment 1

[0046] Embodiment 1: This embodiment demonstrates the result of using a continuous surface deformable mirror to load a ring helicoid with a topological charge equal to 2 to generate vortex laser light for the annular light field emitted by an unstable cavity laser.

[0047] For the annular light field emitted by the unstable cavity laser, figure 1 The device in the figure removes the first focusing lens 7, and the optical shaping plate 3 is not loaded with a surface shape, which is a mirror. First, the voltage of the continuous surface deforming mirror 9 is set to zero, and the annular light field emitted by the laser 1 passes through the first lens 5 and the second lens 6, expands the beam to the beam width required by the continuous surface deforming mirror 9, and then passes through the second dichroic prism 8 Arrive at the continuous surface deforming mirror 9, reflect through the continuous surface deforming mirror 9 and the second dichroic prism 8, reach the third dichro...

Embodiment 2

[0061] Embodiment 2: This embodiment shows that after the Gaussian light field emitted by the laser 1 is pre-shaped, a continuous surface deformable mirror 9 is used to fit a ring-shaped helicoid with a topological charge of 1 to generate a high-power vortex laser.

[0062] For a solid light field, figure 1 The device shown remains unchanged. First, the Gaussian light field emitted by the laser 1 passes through the first beam splitter 2, and then irradiates on the optical shaping plate 3, and the light field is sent to the first lens 5 and the second lens 6 to form an expansion plate through the optical shaping plate 3 and the reflector 4. The beam system, after beam expansion, is focused on the continuous surface deformable mirror 9 by the first focusing lens 7, and the annular light field is obtained on the plane where the continuous surface deformable mirror 9 is located. It is reflected by the continuous surface deforming mirror 9 to the second beam splitter 8, and then r...

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Abstract

The invention relates to a method and a device for generating high-power vortex laser. A continuous surface deformation mirror is mainly used for fitting an annular spiral surface shape, high-power vortex laser can be directly generated for an annular light field emitted by an unstable cavity laser, solid light fields emitted by other lasers need to be pre-shaped into the annular light field, and then the light field is loaded to the continuous surface deformation mirror to generate high-power vortex laser. A self-adaptive optical system is arranged in the device, aberration of the system and an input light field can be corrected before high-power vortex laser is generated, and a high-quality incident light field is obtained. According to the method, the optical field of the annular structure is adopted to generate the vortex laser, the advantage of side lobe suppression is achieved, the continuous surface deformation mirror can bear high-power laser, the reflection type structure can solve the problem of broadband laser dispersion, surface shape change is flexible, and vortex lasers of different modes can be generated. The method is simple to operate and has a great application prospect in the fields of optical processing, particle capture and the like.

Description

technical field [0001] The invention belongs to the field of beam shaping, in particular to a method and device for generating a high-power vortex laser using a continuous surface deformation mirror Background technique [0002] The vortex beam is a beam with a continuous spiral phase distribution, the beam center is a phase singularity, and the center light intensity is always zero. It is also called a dark hollow beam. The light intensity presents a ring-shaped distribution during the beam propagation process. Each photon of such a beam has The size of the orbital angular momentum (orbital angular momentum, OAM), where l is called the topological charge number or mode number. This angular momentum has a mechanical effect and has a good application prospect in optical manipulation; due to its special ring structure, it is also widely used in the field of optical processing; and the modes of the vortex beam are orthogonal to each other, which can be A well-formed orthogon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/09G02B27/00
CPCG02B27/0927G02B27/0025G02B27/0068
Inventor 沈锋唐奥兰斌
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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