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Proceedings Paper

Evaluation of beam quality for high-power lasers
Author(s): Hongru Yang; Lei Wu; Xuexin Wang; Jifang Shi; Gaoping Li; Xiao Ji
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Paper Abstract

High-power lasers are widely used in various scientific, industrial and military applications. There is currently a desire for precision measurement the beam quality of high-power lasers in order to evaluate the performance of the laser systems and the operational effectiveness of chemical and solid-state high-power laser weapons. There are many methods of beam quality determination, such as beam parameter product, encircled energy ratio BQ, Strehi ratio, diffraction limit factor β and beam propagation factor M2. In this paper, a beam quality measurement device is developed for high-power lasers. This device consists of a beam attenuator with large reflective ratio and minimal wavefront distortion, an off-axis parabolic mirror, an imaging lens and an infrared focal plane array detector. The laser beam intensity distribution, beam width, beam divergence and beam pointing stability can be obtained in real-time and the beam quality can be evaluated by the various determinations through imaging process. Advantages and disadvantages of these beam quality determination for evaluation the performance of the high-power lasers are analyzed and discussed. The measurement uncertainties of relative parameters are also analyzed and discussed.

Paper Details

Date Published: 6 February 2008
PDF: 6 pages
Proc. SPIE 6823, High-Power Lasers and Applications IV, 682316 (6 February 2008); doi: 10.1117/12.756250
Show Author Affiliations
Hongru Yang, Xi’an Institute of Applied Optics (China)
Lei Wu, Xi’an Institute of Applied Optics (China)
Xuexin Wang, Xi’an Institute of Applied Optics (China)
Jifang Shi, Xi’an Institute of Applied Optics (China)
Gaoping Li, Xi’an Institute of Applied Optics (China)
Xiao Ji, Xi’an Institute of Applied Optics (China)

Published in SPIE Proceedings Vol. 6823:
High-Power Lasers and Applications IV
Dianyuan Fan; Robert F. Walter, Editor(s)

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