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Proceedings Paper

New approach to characterize multimode lasers
Author(s): Keming Du; Peter Loosen
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Paper Abstract

So far the beam quality, the normalized beam quality K*, and beam quality factor M2 are used for the characterization of laser beams. However, many application results show that such a characterization is not sufficient for high power lasers. This results mainly from the fact that due to the high gain and large aperture most high-power lasers operate in multimode (longitudinal and transverse). Therefore, high-power lasers fluctuate temporally and spatially and are partially coherent. Depending on the process dynamics the fluctuation of the laser intensity can have strong influences on the application results. On the other side the intensity distribution near the focus can change distinctly, so that the application results are affected. In this paper the detailed propagation of the intensity profile is considered.

Paper Details

Date Published: 4 May 1993
PDF: 4 pages
Proc. SPIE 1810, 9th International Symposium on Gas Flow and Chemical Lasers, (4 May 1993); doi: 10.1117/12.144601
Show Author Affiliations
Keming Du, Fraunhofer-Institut fuer Lasertechnik (Germany)
Peter Loosen, Fraunhofer-Institut fuer Lasertechnik (Germany)

Published in SPIE Proceedings Vol. 1810:
9th International Symposium on Gas Flow and Chemical Lasers

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