Mid-Infrared High Energy Laser Beam Sensor

Pengling, 杨鹏翎 Yang; Guobin, 冯国斌 Feng; Qunshu, 王群书 Wang; Zhenbao, 王振宝 Wang; Jianping, 程建平 Cheng

doi:10.3788/cjl20093608.1979

Cited by 2 publications

(1 citation statement)

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“…There are three types of array detectors available based on their measurement principle: photoelectric detector, 6-8 photothermal detector, 9,10 and photoelectric and photothermal compound detector. [11][12][13][14][15] The latter two almost completely absorb the incident laser energy by applying an absorbable material such as graphite; the absolute intensity distribution of the laser beam can be obtained by measuring the change in the material's temperature. However, too high a temperature caused by a large amount of energy may influence the accuracy of the intensity distribution and may even result in damage to the detector.…”

Section: Introductionmentioning

confidence: 99%

Array detector for high energy laser based on diffuse transmission sampling

Pang

Rong

Zhou

et al. 2014

Review of Scientific Instruments

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Articles you may be interested inBroadband and tunable mid-infrared laser source based on a transversal array of chirped filaments Absolute energy reference calorimeter with bismuth telluride thermocouples for laser energy standard Rev. Sci. Instrum. 76, 113107 (2005); 10.1063/1.2135286 High-accuracy wavemeter based on a stabilized diode laserIn 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 .

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Section: Introductionmentioning

confidence: 99%