Optical parametric oscillation using the new lithium selenoindate nonlinear crystal is reported for what is to our knowledge the first time. A 17 mm long, type II phase-matched sample is pumped by a 10 ns Nd:YAG laser. The minimum pump energy threshold is 3 mJ for a signal-resonant configuration. The signal and idler waves are tunable between 1.47 and 1.57 µm, and 3.3 and 3.78 µm, with a total output energy of 170 µJ corresponding to a 2.4% energy conversion at 8 mJ pump, only limited by the AR coatings damage. With optimized crystal quality and coatings, lithium selenoindate should show superior performance as compared with AgGaS(e)2 crystals, owing to its 4× larger thermal conductivity.
© 2005 Optical Society of America
Jean-Jacques Zondy, Vitaliy Vedenyapin, Alexander Yelisseyev, Sergei Lobanov, Ludmila Isaenko, and Valentin Petrov, "LiInSe2 nanosecond optical parametric oscillator," Opt. Lett. 30, 2460-2462 (2005)