Experimental evidence of spontaneous symmetry breaking in intracavity type II second-harmonic generation with triple resonance

Laurent Longchambon, Nicolas Treps, Thomas Coudreau, Julien Laurat, Claude Fabre
2005 Optics Letters  
We describe an experiment showing 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 dual cavity containing a type II phase matched $\chi^{(2)}$ crystal pumped at the fundamental frequency $\omega_0$. The pump beam generates in the cavity a second harmonic mode at frequency $2\omega_0$ which acts as a pump for frequency degenerate
more » ... ency degenerate type II parametric down conversion. Under operating conditions which are precisely symmetric with respect to the ordinary and extraordinary components of the fundamental wave, we have observed a breaking of the symmetry on the intensities of these two waves in agreement with the theoretical predictions.
doi:10.1364/ol.30.000284 pmid:15751886 fatcat:gax4zvogxzellg2ssefpitdjs4