CW singly-resonant optical parametric oscillator based on periodically poled LiNbO/sub 3/

Summary form only given. Our work is the first report of a broadly tunable cw singly resonant optical parametric oscillator (SRO). We use the 1.064-/spl mu/m radiation from a Nd:YAG laser to pump periodically poled lithium niobate (PPLN) obtaining tunable radiation in the important 1.5-/spl mu/m and 3.3-/spl mu/m regions. The high gain and low loss of PPLN are the key to the operation of this device. The PPLN OPO operated robustly 2-3 times above threshold with a maximum pump depletion of 50%.