Abstract
With renewed refractive indices, the potential of a solid solution () in optical frequency conversion—especially in phase matching and group velocity matching—is theoretically investigated, together with the composition ratio limitation. It is found that the solution has excellent features for generating coherent ultrafast mid-IR sources covering 8–11 μm, which can be realized by type II down-conversion in the ba-plane with perfect group velocity matching, or type I in the bc-plane with part group velocity matching. This will have broad applications in LiDAR monitoring and precision spectroscopy, as well as life and environmental sciences.
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