Abstract

The mode spectra in usual lasers with fundamental Gaussian beams are shown to be correlated to the critical length introduced for a monomode laser with lens or lenslike effects induced by the Gaussian beams. Three typical mode behaviors exist with large asymmetry-mode spectra in different lasers. The bulk of the oscillation energy occurs (1) to the low-frequency side of the gain curve, (2) to the high-frequency side of the gain curve, (3) to the low- or the high-frequency side alternatively. For a given laser, the effective behavior is governed by its geometry relative to the critical geometry, which depends on the cavity parameters, and by the position of the diffracting element.

© 1985 Optical Society of America

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Corrections

A. Le Floch, A. Daudé, R. Le Naour, J. M. Lenormand, and G. Ropars, "Critical geometry in multimode-laser spectra: erratum," J. Opt. Soc. Am. B 2, 1373-1373 (1985)
https://www.osapublishing.org/josab/abstract.cfm?uri=josab-2-8-1373

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