Abstract

Squeezing can be generated by means of traveling-wave (TW) second-harmonic generation (S1 1C), even when there is a large phase mismatch between the fundamental and the harmonic fields. We show, in particular, that in the type-II geometry squeezed vacuum is created in the mode that is polarized orthogonal lo the fundamental beam. In the large phase-mismatch limit, where the fundamental field experiences little depletion and negligible second harmonic is generated, nonlinear phase shift of the fundamental wave introduced during the 5HG process is responsible for the creation of squeezing.

© 1994 Optical Society of America