Second-harmonic generation of Er:YAG 2.94-μm laser radiation using an organic vinylidene cyanide/vinyl acetate thin film

Abstract

Frequency doubling of an Er:YAG laser beam is observed by using a vinylidene cyanide/vinyl acetate copolymer. The nonlinear susceptibility ${\chi }_{\text{eff}}^{(2)}$ is evaluated to be 5.6 × 10⁻⁷ esu, which is 2.8 times larger than that of LiNbO₃ crystal. The dependence of the measured ${\chi }_{\text{eff}}^{(2)}$ on the poling process is analyzed based on a theoretical model.

© 1990 Optical Society of America

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