Unlock instant, AI-driven research and patent intelligence for your innovation.

Method and device for improving safety of large-diameter optical element by suppressing transverse nonlinear effect

A technology of optical components and nonlinear effects, applied in nonlinear optics, optical components, optics, etc., can solve problems such as damage, reduce risks and improve uniformity

Active Publication Date: 2013-01-02
HARBIN INST OF TECH
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to solve the problem of damage to large-aperture optical components caused by transverse nonlinear effects such as TSBS and TSRS, and to provide a method and device for suppressing transverse nonlinear effects and improving the safety of large-aperture optical components

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and device for improving safety of large-diameter optical element by suppressing transverse nonlinear effect
  • Method and device for improving safety of large-diameter optical element by suppressing transverse nonlinear effect
  • Method and device for improving safety of large-diameter optical element by suppressing transverse nonlinear effect

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0020] Specific implementation mode one: the following combination figure 1 Describe this embodiment, the method for suppressing the transverse nonlinear effect and improving the safety of large-aperture optical components described in this embodiment, the method is: divide the laser beam incident on the large-aperture optical components into m×n sub-beams in advance, each The polarization directions of two adjacent sub-beams are perpendicular to each other, and both m and n are positive integers.

specific Embodiment approach 2

[0021] Specific implementation mode two: the following combination figure 1 , Figure 4 and Figure 5 Describe this embodiment, the device for suppressing the transverse nonlinear effect and improving the safety of large-aperture optical components, which includes a laser source 1 , a polarization control plate 2 and a large-aperture optical component 3 .

[0022] The polarization control plate 2 is composed of m×n polarization rotation elements, forming an m×n two-dimensional array, m and n are both positive integers, and the laser light emitted by the laser source 1 passes through the polarization control plate 2 and is divided into m×n sub-beams , the polarization directions of every two adjacent sub-beams are perpendicular to each other, and the m×n sub-beams are incident on the large-aperture optical component 3 .

[0023] In the large-aperture optical component 3, the transmission direction of the Stokes light generated by TSBS, TSRS, etc. is perpendicular to the pola...

specific Embodiment approach 3

[0024] Embodiment 3: In this embodiment, Embodiment 2 is further described. The polarization control plate 2 is realized by using a quartz half-wave plate, a KDP crystal or a nematic liquid crystal.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a method and a device for improving safety of a large-diameter optical element by suppressing transverse nonlinear effect, belonging to the field of optics, and solving the problems that the large-diameter optical element is damaged by the transverse nonlinear effect such as TSBS (transverse stimulated brillouin scattering) and TSRS (transverse stimulated raman scattering) and the like. The method for improving the safety of the large-diameter optical element by suppressing transverse nonlinear effect comprises the step of dividing a laser beam emitted to the large-diameter optical element into m*n sub-light beams in advance, wherein every two adjacent sub-light beams are in vertical polarization directions. The device for improving the safety of the large-diameter optical element by suppressing transverse nonlinear effect comprises a laser source, a polarization control plate and a large-diameter optical element, wherein the polarization control plate comprises m*n vibration rotating units which form m*n two-dimensional arrays; the laser from the laser source is divided into m* n sub-light beams through the polarization control plate; every two adjacent sub-light beams are in vertical polarization directions; and the m*n sub-light beams are emitted into the large-diameter optical element.

Description

technical field [0001] The invention relates to a method and a device for suppressing transverse nonlinear effects and improving the safety of large-diameter optical components, belonging to the field of optics. Background technique [0002] In order to meet the demand for high-energy and high-power lasers in certain research and engineering fields, the overall output level of the laser system is getting higher and higher, and the beam aperture is getting larger and larger. However, when the high-flux laser passes through large-diameter optical components such as lenses, lenses, and crystals (such as figure 2 shown), it is easy to cause nonlinear effects such as stimulated Brillouin scattering and stimulated Raman scattering in the direction perpendicular to the laser polarization direction, such as image 3 As shown, such transverse stimulated Brillouin scattering (TSBS) and transverse stimulated Raman scattering (TSRS) are likely to cause damage or destruction to large-ap...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G02F1/39G02B27/28
Inventor 吕志伟樊心民林殿阳
Owner HARBIN INST OF TECH