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Non-collinear serial beam combining method and device based on stimulated Brillouin scattering

A stimulated Brillouin and non-collinear technology, applied in the field of optics, can solve the problems of inability to further realize beam combination, achieve low energy stability requirements, increase load capacity, and increase the effect of volume

Active Publication Date: 2017-02-01
吕志伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that when several beams of light are combined in series, the energy density of the amplified light reaches the generation threshold of nonlinear effects such as stimulated Raman scattering of the medium or exceeds the breakdown threshold of the medium, so that further beam combination cannot be realized Problem, provide a non-collinear serial beam combining method and device based on stimulated Brillouin scattering

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  • Non-collinear serial beam combining method and device based on stimulated Brillouin scattering
  • Non-collinear serial beam combining method and device based on stimulated Brillouin scattering
  • Non-collinear serial beam combining method and device based on stimulated Brillouin scattering

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specific Embodiment approach 1

[0016] Specific implementation mode one: combine figure 1 To illustrate this embodiment, the non-collinear serial bundle method based on stimulated Brillouin scattering described in this embodiment is as follows: setting a cylinder at the seed light incident end of each non-collinear Brillouin amplification structure unit 1 The lens beam expander system 1-1, the seed light 2 enters the non-collinear Brillouin amplification structure unit 1 after being expanded by the cylindrical lens beam expander system 1-1, and multiple non-collinear Brillouin amplification structure units 1 serial connection.

[0017] In the above method, before the seed light 2 is incident on each medium cell 1-2, it first passes through the cylindrical lens beam expander system 1-1 to expand the beam. This method can improve the load capacity of the beam assembly device and avoid stimulated Raman scattering Non-linear effects and dielectric breakdown threshold issues.

specific Embodiment approach 2

[0018] Specific implementation mode two: combination figure 1 Describe this embodiment. This embodiment is a further limitation of the non-collinear serial beam combining method based on stimulated Brillouin scattering described in Embodiment 1. In this embodiment, at the last level of non-collinear Brillouin The seed light output end of the deep amplification structure unit 1 is equipped with a cylindrical lens beam reduction system 4, and the seed light 2 is amplified by the last non-collinear Brillouin amplification structure unit 1, and then exits through the cylindrical lens contraction system 4.

[0019] The cylindrical lens beam reduction system 4 is used to shape the seed light 2 into a shape before magnification. After several stages of beam combination, the spot shape of the output amplified light can still be kept the same as before the incident.

specific Embodiment approach 3

[0020] Specific implementation mode three: combination figure 1 Describe this embodiment, the non-collinear serial beam combining device based on stimulated Brillouin scattering described in this embodiment includes n non-collinear Brillouin amplification structural units 1, n is a natural number, and n>1, n non-collinear Brillouin amplification structure units 1 are connected in series, and each non-collinear Brillouin amplification structure unit 1 includes a cylindrical lens beam expander system 1-1, a dielectric pool 1-2 and an optical trap 1-3 , after being expanded by the cylindrical lens beam expander system 1-1, the seed light 2 is incident into the medium pool 1-2 along the length direction of the medium pool 1-2, and the pumping light 3 is incident from one side of the medium pool 1-2 into the medium pool 1-2 and amplify the seed light 2, the remaining pumping light 3 passes through the medium pool 1-2 and then enters the optical trap 1-3, the seed light 2 and the pu...

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Abstract

The invention discloses a non-collineation serial beam grouping method and device based on excited brillouin scattering, relates to a serial beam grouping technique of laser, and aims to solve the problem that in serial beam grouping, a plurality of light beams cannot be further grouped when amplification light energy density reaches a generation threshold of a nonlinear effect such as excited brillouin scattering of a medium or exceeds a breakdown threshold of the medium. Seed light is fed to be in front of each medium pond, beams are firstly amplified through a cylindrical lens beam amplification system, and the outgoing end of a final medium pond is provided with a cylindrical lens beam shrinkage system for shrinking the beams, so that the problems that nonlinear effects such as excited brillouin scattering are generated and the medium has a breakdown threshold can be avoided; in addition, the structure is simple, the amplification efficiency is improved, the energy stability requirements of pumping light are low, different loading capabilities can be obtained by using the cylindrical lens beam amplification system with different beam amplification ratios, the shapes of outgoing light spots are identical to those of light before being fed, and the method and the device are applicable to fields such as inertial confinement fusion, impact intensification, optoelectronic countermeasure, laser radar and optical parametric oscillator pumping.

Description

technical field [0001] The invention relates to the serial beam combination technology of laser, belonging to the field of optics. Background technique [0002] Solid-state lasers with high energy, repetition rate, and high beam quality are widely used in inertial confinement fusion, shock hardening, photoelectric countermeasures, lidar, and optical parametric oscillator pumping. With the increase of repetition rate and energy, the laser system relying solely on the main oscillation power amplification structure will be subject to technical problems such as the size of the gain medium, thermal influence and damage threshold, resulting in the stability and beam quality of the laser system cannot be guaranteed. At the same time, since the working state of each stage of amplifying units will affect the performance of the output light, the stability will also deteriorate with the increase of amplifying units. [0003] An effective way to establish a high-energy laser system is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/10
CPCG02F1/39H01S3/30
Inventor 吕志伟白振旭
Owner 吕志伟
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