Abstract

A study of the Gaussian normal modes in optical resonators with spherical reflectors is presented. The analysis is based upon the complex rays approximations and the requirement of self-consistency. It is found that a Gaussian normal mode exists in a resonator of this type only if the resonator is stable. For such a stable resonator, formulae for the complex beam parameter, variation of the beam diameter along the resonator axis, mode volume inside the resonator, and far-field parameters of the Gaussian normal mode are derived. Some of these formulae have not been previously obtained, while others are in agreement with those available in the literature derived from other methods.

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