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Method for improving laser excited brillouin scattering breakdown threshold value

A technology of Brillouin scattering and laser stimulation, which is applied in the direction of laser scattering effect, laser, laser parts, etc., to achieve the effect of high focusable power density

Inactive Publication Date: 2005-02-16
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Stimulated Brillouin scattering can reduce θ and reduce Δt, thus greatly increasing the focusable power density P F value, but when the laser pulse energy E increases, there is an optical limitation (see Lu Yuelan et al. Stimulated Brillouin Scattering on the Optical Limiting Law of Nanosecond Laser Pulses, Strong Laser and Particle Beam, 2003, 15, (5 )427-430

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  • Method for improving laser excited brillouin scattering breakdown threshold value
  • Method for improving laser excited brillouin scattering breakdown threshold value
  • Method for improving laser excited brillouin scattering breakdown threshold value

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Embodiment Construction

[0017] see figure 1 , figure 1 It is a structural diagram of a specific embodiment for implementing the method of the present invention. As can be seen from the figure, the device of the method for improving the laser stimulated Brillouin scatter breakthrough threshold in the present invention is to install an ultrafiltration membrane separation device on the stimulated Brillouin cell 5 of the laser, in which a pipeline 81 passes through a liquid The circulation pump 7 connects the excited Brillouin cell 5 and the ultrafiltration membrane separator 8 , and another pipeline 82 directly connects the excited Brillouin cell 5 and the ultrafiltration membrane separator 8 .

[0018] The laser resonator is composed of output mirror 1, laser medium 2, focusing mirror 4 and stimulated Brillouin cell 5, and the volume of laser medium 2 is 10cm 3 YAG crystal, the pump source 3 is a pulsed xenon lamp, if the focusing mirror 4 and the excited Brillouin cell are replaced by a total reflec...

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Abstract

Separating unit of ultra filtration membrane is adopted in the invention to filter out molecules of large granule in excited Brillouin medium, and to reserve small molecule in molecular weight being smaller than 600. Thus, the invention raises breakdown strength of medium, making laser device possible to operate at larger pulse energy.

Description

technical field [0001] The invention relates to a pulsed laser, in particular to a method for increasing the breakdown threshold of stimulated Brillouin scattering of laser light. Background technique [0002] In pulsed laser applications, increasing the focusable power density of the laser pulse P F is a very important indicator, [0003] P F = E Δt * π * d 2 [0004] Where, E is the energy of the laser pulse, Δt is the width of the laser pulse, and d is the radius of the focal spot. because [0005] d=θ*f [0006] Where θ is the divergence angle of the beam, and f is the focal length of the focusing lens. Therefore, [0007] P F = E Δt * ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/00H01S3/108H01S3/30
Inventor 楼祺洪
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI