Abstract

The temperature tuning of BaGa₄Se₇ (BGSe) was demonstrated for the first time, to the best of our knowledge. When the temperature of BGSe (56.3°,0°) was raised from 30°C to 140°C, the idler light under type I raised from 3637 nm to 3989 nm, the tunable range reached 352 nm, and Δλ₂/ΔT reached 3.20 nm/°C. We calculated the phase matching curve of BGSe when ∅ and T took different values. The relationship between θ and Δλ₂/ΔT was obtained by fixing ∅ at 0°. The maximum Δλ₂/ΔT and its corresponding (θ, ∅) phase matching type were reported under different fixed λ₂ (3 µm, 3.2 µm,…, 5 µm).

© 2021 Chinese Laser Press

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