Sellmeier and thermo-optic dispersion formulas for AgGa(S1-xSex)2 with application in mid-IR generation

Sellmeier equations of the mixture crystal AgGa(S 1-x Se x ) 2 for various concentration (x=0.3, 0.55, 0.75) are presented along with thermo-optic dispersion formulas at x=0.55, these equations were used to predict the 90 o phase-matching wavelength for Nd:YAG pumped OPO near 5.75μm for medical applications.