Single-frequency continuous-wave radiation from 0.77 to 1.73 mu m generated by a green-pumped optical parametric oscillator with periodically poled LiTaO3

We describe a cw optical parametric oscillator (OPO) with multigrating peri odically poled LiTaO3. Pumped by a single-frequency 532-nm laser, the OPO e mits single-frequency radiation at wavelengths from 0.77 to 1.73 mu m with as much as 60 mW of output power. Mode-hop-free operation for as long as 50 min, a low frequency drift (<70 MHz/h), and as much as 700-MHz continuous frequency tuning of signal and idler are demonstrated. (C) 1999 Optical Soc iety of America.