Abstract

The unknown magnitude and relative signs of the trigonal crystal ${\rm BaGa}_{2}{\rm GeSe}_{6}$ nonlinear coefficients have hindered defining an optimum orientation for maximum frequency conversion efficiency. This issue is resolved in the present work, obtaining ${d_{11}}= + {23.6}$, ${d_{22}}= - {18.5}$, and ${d_{31}}= + {18.3}\;{\rm pm/V}$ for frequency doubling of the 10.591 µm radiation.

© 2020 Optical Society of America

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