Abstract

We report the observation of non-Gaussian reflected and transmitted laser spatial profiles resulting from the excitation of resonant modes below the critical angle for total reflection in a Fabry–Perot cavity formed by a thin 7um air film between two glass prisms. The observations of an interference minimum in the reflected profile and exponential decay in the transmitted profile are new and in excellent agreement with a complex pole theory. Extension of the theory to a larger 0.7m cavity at normal incidence predicts similar reshaped profiles.

© 2012 Optical Society of America

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