Difference-frequency Generation at 9.2 & 4.6 μm in LiGaS2 Pumped by a 20-picosecond Nd:YAG/CaCO3 Raman Laser

Thermophysical properties of lithium thiogallate that are important for optical applications

“…In this group, the highest LDT (>240 MW cm −2 ) is shown for orthorhombic LiGaS 2 (LGS). This crystal is widely used for high average power frequency down conversion from the 1 μm spectral range, 6 although its nonlinear susceptibility ( d 31 = 5.8 pm V −1 ) 5 is significantly inferior to the parameters AgGaS 2 , AgGaSe 2 and ZnGeP 2 ( d 36 = 18, 32.4 × 18 pm V −1 , respectively 7 ).…”