Second-harmonic generation of Er:YAG 2.94-microm laser radiation using an organic vinylidene cyanide/vinyl acetate thin film.
Frequency doubling of an Er:YAG laser beam is observed by using a vinylidene cyanide/vinyl acetate copolymer. The nonlinear susceptibility chi((2))(eff) is evaluated to be 5.6 x 10(-7) esu, which is 2.8 times larger than that of LiNbO(3) crystal. The dependence of the measured chi((2))(eff) on the poling process is analyzed based on a theoretical model.