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Proceedings Paper

Damage behavior of Nd:glass of high-power disk amplifier medium in ICF Facility
Author(s): Shaobo He; Lin Chen; Xiaodong Yuan; Yuanbin Chen; Xiaofeng Cheng; Xudong Xie; Wenyi Wang; Xiaotao Zu
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Paper Abstract

Large aperture Nd:glass disk is often used as the amplifier medium in the inertial confinement fusion (ICF) facilities. The typical size of Nd:glass is up to 810mm×460mm×40mm and more than 3,000 Nd:glass components are needed in the ICF facility. At present, the 3ω fused silica glass and DKDP crystal are mainly responsible for the damage of driver used for ICF. However, with the enlargement of the facility and increase of laser shot number, the laser damage of Nd:glass at 1ω waveband is still an important problem to limit the stable operation of facility and improvement of laser beam quality. In this work, the influence of Nd:glass material itself, mechanical processing, service environment, and laser beam quality on its damage behavior is investigated experimentally and theoretically. The results and conclusions can be summarized as follows: (1) It is very important to control the concentration of platinum impurity particles during melting and the sputtering effect of the cladding materials. (2) The number and length of fractural and brittle scratches should be strictly suppressed during mechanical processing of Nd:glass. (3) The B-integral of high power laser beam should be rigorously controlled. Particularly, the top shape of pulses must be well controlled when operating at high peak laser power. (4) The service environment should be well managed to make sure the cleanness of the surface of Nd:glass better than 100/A level during mounting and running. (5) The service environment and beam quality should be monitored during operation.

Paper Details

Date Published: 6 December 2016
PDF: 6 pages
Proc. SPIE 10014, Laser-Induced Damage in Optical Materials 2016, 100141H (6 December 2016); doi: 10.1117/12.2248134
Show Author Affiliations
Shaobo He, Univ. of Electric Science and Technology of China (China)
China Academy of Engineering Physics (China)
Lin Chen, China Academy of Engineering Physics (China)
Xiaodong Yuan, China Academy of Engineering Physics (China)
Yuanbin Chen, China Academy of Engineering Physics (China)
Xiaofeng Cheng, China Academy of Engineering Physics (China)
Xudong Xie, China Academy of Engineering Physics (China)
Wenyi Wang, China Academy of Engineering Physics (China)
Xiaotao Zu, Univ. of Electronic Science and Technology of China (China)

Published in SPIE Proceedings Vol. 10014:
Laser-Induced Damage in Optical Materials 2016
Greg J. Exarhos; Vitaly E. Gruzdev; Joseph A. Menapace; Detlev Ristau; MJ Soileau, Editor(s)

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