New approach to characterize multimode lasers

Keming Du; Peter Loosen

doi:10.1117/12.144601

4 May 1993 New approach to characterize multimode lasers

Keming Du, Peter Loosen

Proceedings Volume 1810, 9th International Symposium on Gas Flow and Chemical Lasers; (1993) https://doi.org/10.1117/12.144601
Event: Ninth International Symposium on Gas Flow and Chemical Lasers, 1992, Heraklion, Greece

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.

Citation Download Citation

Keming Du and Peter Loosen "New approach to characterize multimode lasers", Proc. SPIE 1810, 9th International Symposium on Gas Flow and Chemical Lasers, (4 May 1993); https://doi.org/10.1117/12.144601

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