Dominant-mode laser beam as Gauss-Schell model beam

Stefan Amarande; Ion N. Mihailescu

doi:10.1117/12.204908

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31 March 1995 Dominant-mode laser beam as Gauss-Schell model beam

Stefan Amarande, Ion N. Mihailescu

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Proceedings Volume 2502, Gas Flow and Chemical Lasers: Tenth International Symposium; (1995) https://doi.org/10.1117/12.204908
Event: Gas Flow and Chemical Lasers: Tenth International Symposium, 1994, Friedrichshafen, Germany

Abstract

Lasers that are equipped with stable optical resonators having large to very large Fresnel numbers and uniform active medium with respect to gain and refractive index, are running multimode, and the highest order transverse mode has the largest mode coefficient. By using this dominant mode feature and an incoherent superposition of the coherent modes, a simple approximate relation was inferred, that allows to estimate beam quality factor M² from the geometrical data of the cavity. A way to evaluate the global degree of coherence of dominant mode laser beams by using a Gauss-Schell model beam having the same beam quality factor M², is proposed.

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Stefan Amarande and Ion N. Mihailescu "Dominant-mode laser beam as Gauss-Schell model beam", Proc. SPIE 2502, Gas Flow and Chemical Lasers: Tenth International Symposium, (31 March 1995); https://doi.org/10.1117/12.204908

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