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Title: Array detector for high energy laser based on diffuse transmission sampling

In order to improve the ability and accuracy of measuring the temporal–spatial distribution of the intensity of a large-size, high-energy laser beam, a novel array detecting method based on diffuse transmission sampling is proposed. The measurement principle and the design of the sampling and attenuating unit are presented. High-temperature-resistant diffuse transmission material is used to sample and attenuate a high energy laser beam. Pure copper, whose surface is first sand-blasted and then gold-plated, is applied to scatter the incident high-energy laser beam. The formula for the attenuation ratio was derived in detail. We developed two large-aperture array detectors with spatial resolution of 5 mm, spatial duty ratio of 20%, and useable angle range of ±30° without varying the responsivity, the non-uniformity in the laser profile measurement is below 1%, and the repeatability error in the laser power measurement is approximately 1%. The maximal energy density that the array detector can endure is more than 10 kJ/cm{sup 2}.
Authors:
 [1] ;  [2] ;  [2] ;  [1] ; ; ; ;  [3] ;  [4]
  1. School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054 (China)
  2. (China)
  3. Institute of Applied Electronics, China Academy of Engineering Physics, Mianyang, 621900 China (China)
  4. Key Laboratory of High Energy Laser, CAEP, Mianyang 621900 (China)
Publication Date:
OSTI Identifier:
22251152
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 85; Journal Issue: 1; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ACCURACY; APERTURES; APPROXIMATIONS; ATTENUATION; BEAMS; COPPER; DESIGN; ENERGY DENSITY; GOLD; LASERS; LIGHT TRANSMISSION; RADIATION DETECTORS; SAMPLING; SPATIAL RESOLUTION