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Device for measuring nonlinear transmission characteristic of laser beam

A technology of nonlinear transmission and measurement device, which is applied in the field of measurement of laser beam transmission characteristics, and can solve problems such as not reflecting the relationship between spatial frequency and nonlinear effects

Inactive Publication Date: 2010-08-18
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

However, all their experiments used modulation fields of specific spatial frequencies, which did not reflect the relationship between spatial frequencies and nonlinear effects.

Method used

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  • Device for measuring nonlinear transmission characteristic of laser beam
  • Device for measuring nonlinear transmission characteristic of laser beam

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the embodiments and accompanying drawings, but the protection scope of the present invention should not be limited thereby.

[0021] see first figure 1 , as can be seen from the figure, the measuring device of the nonlinear transmission characteristic of the laser beam of the present invention consists of a laser 1, an adjustable attenuator 2, a half mirror 3, a total reflection mirror 4, a first reflection attenuator 5, and a stepping motor 6 , nonlinear dielectric box 7, second reflection attenuator 8, third reflection attenuator 10, first CCD9 and second CCD12, and the positional relationship of the above-mentioned components is as follows:

[0022] The laser beam output direction of the laser 1 is the adjustable attenuation sheet 2, the half mirror 3 and the first reflection attenuator 5 successively, and the half mirror 3 is formed with the laser beam 45°, the first reflection attenuator 5 i...

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Abstract

The invention discloses a device for measuring nonlinear transmission characteristic of a laser beam, which consists of a laser, an adjustable attenuation plate, a half transparent and Half reflecting mirror, a totally reflecting mirror, a first reflecting attenuator, a stepping motor, a nonlinear medium box, a second reflecting attenuator, a third reflecting attenuator, and a first CCD and a second CCD. The device for measuring the nonlinear transmission characteristic of the laser beam can measure the transmission characteristic of laser light in a nonlinear medium, particularly intuitively detects a relation curve between the spatial frequency and small-scale self-focusing effect, and has simple operation.

Description

technical field [0001] The invention relates to the measurement of the transmission characteristic of the laser beam, in particular to a measurement device for the nonlinear transmission characteristic of the laser beam. Background technique [0002] In laser inertial confinement fusion, the nonlinear self-focusing effect is one of the main factors that limit the laser output power and destroy the beam quality, and the small-scale self-focusing effect is more destructive, which is caused by small phase and amplitude modulation. The local nonlinear refractive index makes the beam locally unstable, causing the beam to split into filaments with high intensity, resulting in local destruction of the laser medium. Studying the process and conditions of small-scale self-fusion in nonlinear media will play an important guiding role in avoiding damage to optical components and improving laser output power. [0003] In 1966, Baspalov and Talanov first proposed the linear perturbation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/17G01J1/42
Inventor 李小燕张艳丽欧阳小平孙平平张燕刘芳孙明营朱健强
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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