title: Array detector for high energy laser based on diffuse transmission sampling.
abstract: 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(2).
authors: School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China.
authors: Miao
authors: M
authors: Pang
authors: School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China.
authors: Jian
authors: J
authors: Rong
authors: Institute of Applied Electronics, China Academy of Engineering Physics, Mianyang, 621900 China.
authors: Shan
authors: S
authors: Zhou
authors: Institute of Applied Electronics, China Academy of Engineering Physics, Mianyang, 621900 China.
authors: Juan
authors: J
authors: Wu
authors: Key Laboratory of High Energy Laser, CAEP, Mianyang 621900, China.
authors: Guobin
authors: G
authors: Fan
authors: Institute of Applied Electronics, China Academy of Engineering Physics, Mianyang, 621900 China.
authors: Wei
authors: W
authors: Zhang
authors: Institute of Applied Electronics, China Academy of Engineering Physics, Mianyang, 621900 China.
authors: Xiaoyang
authors: X
authors: Hu