Optical constants of BaGa4S7 (Barium gallium sulfide, BGS)
Kato et al 2021: n(β) 0.633–8.82 µm
Complex refractive index (n+ik)
Derived optical constants
Dispersion formula
$$n^2=6.86357+\frac{0.16688}{λ^2-0.03156}+\frac{1146.08}{λ^2-665.85}$$Comments
nβ; room temperature.
References
K. Kato, V. V. Badikov, K. Miyata, V. Petrov. Refined Sellmeier equations for BaGa4S7. Appl. Opt., 60, 6600–6603 (2021)
Data
Additional information
About BaGa4S7
BaGa4S7, often abbreviated as BGS in scientific literature and industry documents, is a nonlinear optical crystal known for its high phase-matching capabilities, especially in the visible and near-infrared regions. This material is particularly valuable for frequency conversion applications, such as second-harmonic generation (SHG) and sum-frequency generation (SFG), owing to its high nonlinear optical coefficients. BaGa4S7 is also known for its high laser damage threshold, making it a robust choice for high-power optical applications. Typically grown through methods like the Bridgman technique, the crystal can be precisely cut and polished to create high-quality optical elements. One consideration for users is the material's sensitivity to moisture and chemicals, which necessitates careful handling and storage to preserve its optical properties. Despite this, BaGa4S7 remains a highly attractive material for various nonlinear optical applications, especially those requiring wide tunability, high power-handling, and efficient phase-matching capabilities.
Other names and variations:- BGS