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Laguerre-Gaussian beam solid-state laser based on conical refraction annular light pumping

A solid-state laser and conical refraction technology, which is applied to lasers, laser components, phonon exciters, etc., can solve the problem of low conversion efficiency and achieve high conversion efficiency, strong device adaptability, and easy implementation

Inactive Publication Date: 2017-05-31
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention is aimed at the Laguerre-Gaussian beam solid-state laser pumped by ring light. In order to solve the defect of low conversion efficiency when forming ring pump light, the pump light is converted into ring pump with high efficiency through the conical refraction in the biaxial crystal. Pumping light, using its pumping solid-state laser to obtain high-efficiency Laguerre-Gaussian beam output

Method used

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  • Laguerre-Gaussian beam solid-state laser based on conical refraction annular light pumping
  • Laguerre-Gaussian beam solid-state laser based on conical refraction annular light pumping
  • Laguerre-Gaussian beam solid-state laser based on conical refraction annular light pumping

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Embodiment 1

[0038] Combination hint figure 1 , a high-efficiency first-order or higher-order Laguerre-Gaussian beam solid-state laser pumped based on a biaxial crystal conical refraction ring light, including a pump source 1, a quarter of which the output beam is linearly polarized light Wave plate 2, focusing lens 3, biaxial crystal 4, laser gain medium 5 and laser output mirror 6, wherein quarter wave plate 2, focusing lens 3, biaxial crystal 4, laser gain medium 5 and laser output mirror 6 It is on the same optical axis as the pump light of the pump source 1 whose output beam is linearly polarized light.

[0039] The linearly polarized light emitted by the pump source 1 passes through the quarter-wave plate 2 and becomes circularly polarized pump light, and then the circularly polarized pump light is focused by the focusing lens 3 and passes through the biaxial crystal 4 to produce a conical refraction phenomenon. In a certain distance behind the biaxial crystal 4, the pumping light w...

Embodiment 2

[0040] Example 2: combined schematic figure 2 , a high-efficiency first-order or higher-order Laguerre-Gaussian beam solid-state laser pumped based on a biaxial crystal conical refraction ring light, including a pump source 1, a quarter of which the output beam is partially polarized light Wave plate 2, focusing lens 3, biaxial crystal 4, laser gain medium 5 and laser output mirror 6, wherein quarter wave plate 2, focusing lens 3, biaxial crystal 4, laser gain medium 5 and laser output coupling mirror 6 is on the same optical axis as the pump light of the pump source 1 whose output beam is partially polarized light.

[0041] After the partially polarized light emitted by the pump source 1 passes through the quarter-wave plate 2, the direction of the fast axis of the quarter-wave plate is adjusted so that the pump light becomes unpolarized pump light, and then the unpolarized pump light passes through the focusing lens 3 After focusing, a cone-shaped refraction phenomenon wil...

Embodiment 3

[0042] Embodiment 3: combined schematic image 3 , one is a high-efficiency first-order or higher-order Laguerre-Gaussian beam solid-state laser pumped based on biaxial crystal conical refraction ring light, including the output beam as circularly polarized light or non-polarized beam pump source 1, Focusing lens 3, biaxial crystal 4, laser gain medium 5 and laser output coupling mirror 6, wherein focusing lens 3, biaxial crystal 4, laser gain medium 5, laser output mirror 6 and the output beam are circularly polarized light or non-polarized light beam The pump light of the pump source 1 is on the same optical axis.

[0043] The non-polarized pump light emitted by the pump source 1 is focused by the focusing lens 3, and then passes through the biaxial crystal 4 to produce a conical refraction phenomenon, and the pump light will become annular pump light within a certain distance behind the biaxial crystal 4 All or part of the laser crystal 5 is placed within this distance, so...

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Abstract

The invention discloses a Laguerre-Gaussian beam solid-state laser based on conical refraction annular light pumping, which comprises a pumping source, and is characterized in that a focusing lens, a biaxial crystal, a laser gain medium and a laser output mirror are successively arranged along the light output direction of the pumping source in a manner of sharing the same optical axis; and the biaxial crystal is located within twice focal length of the focusing lens. According to the invention, pumping light is converted into annular pumping light, and the conversion efficiency is close to 100%, so that the light-light efficiency of the pumping light to Laguerre-Gaussian laser light is enabled to be high. In addition, the conversion device has no special requirements for the temperature environment, and arrangement of a cooling device is not required. The Laguerre-Gaussian beam solid-state laser is high in adaptability, and has the characteristics of simple structure and easy implementation.

Description

technical field [0001] The invention belongs to the technology of solid-state lasers, in particular to a high-efficiency first-order or higher-order Laguerre-Gaussian beam solid-state laser pumped based on biaxial crystal conical refraction ring light. Background technique [0002] In recent years, cylindrical vector beams and vortex beams have attracted more and more attention. Their common feature is that the central intensity of the spot is zero and its amplitude can be characterized by a first-order or higher-order Laguerre-Gaussian (LG) function. Typical representatives of cylindrical vector beams include radially polarized lasers and angularly polarized lasers. The electric field vector points to the radius or tangential direction of the cross-section of the spot, and there is a polarization singularity in the center of the spot so that the central amplitude is zero. A vortex beam refers to a beam with a spiral wavefront phase along the direction of light propagation,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/107H01S3/16H01S3/101H01S3/094
CPCH01S3/107H01S3/094H01S3/101H01S3/16
Inventor 李建郎李桂运
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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