Temperature tuning of BaGa4Se7 optical parametric oscillator

The temperature tuning of BaGa 4 Se 7 (BGSe) was demonstrated for the first time, to the best of our knowledge. When the temperature of BGSe (56.3,0) was raised from 30C to 140C, the idler light under type I raised from 3637 nm to 3989 nm, the tunable range reached 352 nm, and 2 =T reached 3.20 nm/C. We calculated the phase matching curve of BGSe when and T took different values. The relationship between and 2 =T was obtained by fixing at 0. The maximum 2 =T and its corresponding (, ) phase matching type were reported under different fixed 2 3 m, 3.2 m, : : : , 5 m.