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Proceedings Paper

Design and comparison of laser windows for high-power lasers
Author(s): Yanxiong Niu; Wenwen Liu; Haixia Liu; Caili Wang; Haisha Niu; Da Man
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Paper Abstract

High-power laser systems are getting more and more widely used in industry and military affairs. It is necessary to develop a high-power laser system which can operate over long periods of time without appreciable degradation in performance. When a high-energy laser beam transmits through a laser window, it is possible that the permanent damage is caused to the window because of the energy absorption by window materials. So, when we design a high-power laser system, a suitable laser window material must be selected and the laser damage threshold of the window must be known. In this paper, a thermal analysis model of high-power laser window is established, and the relationship between the laser intensity and the thermal-stress field distribution is studied by deducing the formulas through utilizing the integral-transform method. The influence of window radius, thickness and laser intensity on the temperature and stress field distributions is analyzed. Then, the performance of K9 glass and the fused silica glass is compared, and the laser-induced damage mechanism is analyzed. Finally, the damage thresholds of laser windows are calculated. The results show that compared with K9 glass, the fused silica glass has a higher damage threshold due to its good thermodynamic properties. The presented theoretical analysis and simulation results are helpful for the design and selection of high-power laser windows.

Paper Details

Date Published: 18 November 2014
PDF: 7 pages
Proc. SPIE 9266, High-Power Lasers and Applications VII, 92660B (18 November 2014); doi: 10.1117/12.2065222
Show Author Affiliations
Yanxiong Niu, BeiHang Univ. (China)
Wenwen Liu, BeiHang Univ. (China)
Haixia Liu, BeiHang Univ. (China)
Caili Wang, BeiHang Univ. (China)
Haisha Niu, BeiHang Univ. (China)
Da Man, BeiHang Univ. (China)

Published in SPIE Proceedings Vol. 9266:
High-Power Lasers and Applications VII
Ruxin Li; Upendra N. Singh; Robert F. Walter, Editor(s)

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