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Proceedings Paper

Determination of wavefront distortion of an aerodynamic window in a high-power laser
Author(s): Yaoning Zhang; ZuHai Cheng; Zhemin Du; Feng Li; Wenjun Kim
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Paper Abstract

The optical characteristics of new type jet injecting aerodynamic window have studied experimentally with HARTMANN diagnostic apparatus. When the pressure of sealed vacuum chamber is changed from 2500 Pa to 771.4 Pa, the Strehl ratio is determined from 0.94 to 0.90. From these optical characteristics it can be analyzed, that the injection flow pressure and the structure of aerodynamic window influences the passed beam quality on. It was shown that the passed beam well be divergence, as the injection flow pressure becomes large. It is related to the radius gradient of air density distribution, caused by gas flow from circular nozzle. And heterogeneous distribution of air bleed hole makes the wavefront tilt so that the passed laser beam well shift.

Paper Details

Date Published: 8 September 1999
PDF: 4 pages
Proc. SPIE 3862, 1999 International Conference on Industrial Lasers, (8 September 1999); doi: 10.1117/12.361159
Show Author Affiliations
Yaoning Zhang, Huazhong Univ. of Science and Technology (China)
ZuHai Cheng, Huazhong Univ. of Science and Technology (China)
Zhemin Du, Huazhong Univ. of Science and Technology (China)
Feng Li, Huazhong Univ. of Science and Technology (China)
Wenjun Kim, Kim Chaek Technical Univ. (South Korea)

Published in SPIE Proceedings Vol. 3862:
1999 International Conference on Industrial Lasers
Fuxi Gan; Horst Weber; Zaiguang Li; Qingming Chen, Editor(s)

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