Abstract
We describe a spontaneous symmetry-breaking phenomenon between the intensities of the ordinary and extraordinary components of the fundamental field in intracavity type II harmonic generation. It is based on a triply resonant cavity containing a type II crystal pumped at fundamental frequency . The pump beam generates a second-harmonic mode at frequency that acts as a pump for frequency-degenerate type II
parametric downconversion. Under operating conditions symmetric with respect to the ordinary and extraordinary components of the fundamental wave, we show a breaking of the symmetry of the intensities of these two waves.
© 2005 Optical Society of America
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