Optical constants of BaGa4Se7 (Barium gallium selenide, BGSe)
Kato et al 2017: n(β) 0.901–10.6 µm
Complex refractive index (n+ik)
Derived optical constants
Dispersion formula
$$n^2=6.86603+\frac{0.26816}{λ^2-0.04259}+\frac{682.97}{λ^2-781.78}$$Comments
nβ; room temperature.
References
K. Kato, K. Miyata, V. Petrov. Phase-matching properties of BaGa4Se7 for SHG and SFG in the 0.901–10.5910 μm range. Appl. Opt., 56, 2978–2981 (2017)
Data
Additional information
About BaGa4Se7
BaGa4Se7, commonly abbreviated as BGSe, is a chalcogenide-based nonlinear optical crystal known for its phase-matching capabilities and broad transparency window. This material is particularly suited for frequency conversion applications in the mid-infrared region, including second-harmonic generation (SHG), sum-frequency generation (SFG), and optical parametric oscillation (OPO). BGSe exhibits high nonlinear optical coefficients, as well as a high laser damage threshold, making it well-suited for high-power applications. The crystal is generally grown using techniques like the Bridgman-Stockbarger method, and can be cut and polished into high-quality facets for optimal performance. One important consideration for this material is its sensitivity to moisture and other environmental factors; thus, careful handling and storage are required to maintain its optical properties. Overall, BGSe offers a compelling combination of properties that make it a valuable material for nonlinear optics, especially for applications requiring high efficiency and broad tunability in the mid-infrared range.
Other names and variations:- BGSe