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High-energy laser semi-integrating-sphere array attenuator

A semi-integrating sphere and high-energy laser technology, applied in the field of array attenuators, can solve problems such as large differences in incident laser absorption coefficient, limited application range, difficult parameter measurement, etc., to ensure consistency, ensure installation accuracy, and improve surface reflection rate effect

Active Publication Date: 2013-07-10
NORTHWEST INST OF NUCLEAR TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem with this kind of attenuator is that it is difficult to measure the parameters when the strong laser is obliquely incident. When the laser enters the laser incident hole at a certain angle, the hole wall of the graphite material has a high absorption of the laser light, and it corresponds to different incidents. The absorption coefficient of the hole wall to the incident laser varies greatly when the angle is different, so it is difficult to use the laser light intensity attenuation and parameter measurement when the angle is incident, which limits the application range of this method

Method used

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  • High-energy laser semi-integrating-sphere array attenuator
  • High-energy laser semi-integrating-sphere array attenuator
  • High-energy laser semi-integrating-sphere array attenuator

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Embodiment Construction

[0021] like figure 1 As shown, a large-angle sampling cone hole 4 is processed on the front panel 1, a hemispherical cavity 3 and a laser exit hole 5 are processed on the rear panel 2, and the two panels are stacked together so that the corresponding large-angle sampling cone hole 4 and the hemispherical cavity 3 are spliced ​​together to form a semi-integrating sphere cavity, and the large-angle sampling cone hole 4 and the laser exit hole 5 are respectively located on both sides of the hemispherical cavity 3 . Laser along the test figure 1 The direction of the middle arrow is coupled into the hemispherical cavity 3 from the large-angle sampling cone hole 4. After repeated absorption and reflection in the cavity, only a small part of the light is finally emitted from the laser exit hole 5, realizing the attenuation of the strong laser power density . Due to the adoption of the large-angle sampling taper hole 4 structure, the attenuator can meet the oblique incidence of lase...

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Abstract

The invention provides a high-energy laser semi-integrating-sphere array attenuator, which comprises a front panel arranged along a laser incident direction, a back panel and a plurality of attenuation units, wherein the attenuation units comprise wide-angle sampling taper holes arranged on the front panel, semi-sphere cavities arranged on the back panel, and laser emergent holes which are arranged on the edges of the semi-sphere cavities and are vertical to the back panel; the positions of the wide-angle sampling taper holes are corresponding to the positions of the semi-sphere cavities one to one; and the wide-angle sampling taper holes and the laser emergent holes are respectively arranged on the two sides of the semi-integrating-sphere cavities. In the attenuator provided by the invention, laser is coupled into the semi-sphere cavities via the wide-angle sampling taper holes, is absorbed and diffuse-reflected by the semi-sphere cavities, and then is ejected from the laser emergentholes, large amplitude attenuation of laser power density is realized, and the requirement of attenuation sampling during oblique incidence of the laser can be satisfied.

Description

technical field [0001] The invention relates to an array attenuator for high-energy laser, in particular to a semi-integrating sphere array attenuator for high-energy laser. Background technique [0002] In the measurement of high-energy laser parameters, the photodetector array sampling method is often used to obtain the temporal and spatial distribution information of laser spot power density. Since the laser power density at the test position is generally high, it is difficult to directly use the photodetector array to measure, so in the actual test, the measured laser power density needs to be reasonably attenuated to meet the range of the photodetector. scope. The ideal optical attenuation method should be independent of the wavelength, incident angle and polarization state of the incident laser, and only attenuate the amplitude of the incident laser accordingly, and the attenuation is linear within a certain range. [0003] At present, the commonly used optical atten...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J1/04
Inventor 杨鹏翎冯国斌吴勇王振宝武俊杰张检民叶锡生
Owner NORTHWEST INST OF NUCLEAR TECH
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