Abstract

Using the grating-action method, we analyze the operation of photorefractive oscillators that use internal-reflection modes of the crystal. We show that the oscillators interacting with the lossless internal modes possess no thresholds for coupling strengths and require no finite input seed for stable operation. The onset of oscillation is like a second-order phase transition, in contrast to the lossy oscillators, whose onset is like a first-order phase transition.

© 2000 Optical Society of America

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