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Transverse pattern variations in a laser with a parabolic excitation profile

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Abstract

Transverse intensity profiles from a model for a laser with a parabolic transverse excitation profile are shown to change from symmetric to asymmetric patterns, with bistability between some patterns, as the frequency spacing between the transverse cavity modes is decreased. The parabolic excitation profile suppresses some of the nonlinear coupling of the transverse modes that predominates when the excitation profile is uniform. Nonetheless there are substantial qualitative similarities between the results for uniform and parabolic excitation, suggesting some generic governing principles for the pattern formation caused by mode competition and mode correlation.

© 1991 Optical Society of America

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