Abstract

Quasi-phase matched crystals are very promising materials for nonlinear optics because of their high nonlinear coefficient. We have built a continuous wave triply resonant Optical Parametric Oscillator using a Periodically Poled Lithium Niobate (PPLN) crystal. It is pumped at 1.06 µm and produces signal and idler beams around degeneracy in the range 2 µm-2.3 µm. Tunability is achieved by mode hopping when the temperature is varied. This device has an ultra-low threshold of 300 µW. It can be operated in a stable way over long period of times

© 2000 IEEE