We have grown single crystals of PbIn 6 Te 10 , with clear transparency from 3 to 20 µm, and showed that this new nonlinear material possesses sufficient birefringence for phase-matching of three-wave parametric interactions and a nonlinear coefficient of 51 pm/V.
Nonlinear crystals of the title compounds, which are transparent into the mid‐ and far‐infrared spectral range to beyond 30 μm are grown and their linear and nonlinear optical properties are determined.
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