Sellmeier and thermo-optic dispersion formulas for GaSe (Revisited)

This paper reports high-accuracy Sellmeier and thermo-optic dispersion formulas for GaSe that provide excellent reproduction of the phase-matching conditions for second-, third-, and fourth- harmonic generation of CO2 laser radiation at 10.5910 mu m in the 20 degrees C-200 degrees C range as well as the data points of Feng et al. [Opt. Express 16, 9978 (2008)] for second-harmonic generation of CO2 laser radiation at 9.5862 mu m and an Er3+:YSGG laser at 2.7960 mu m in the -165 degrees C-230 degrees C range. (C) 2013 Optical Society of America