We report on the first BaGa4Se7 nanosecond optical parametric oscillator pumped by Q-switched Nd:YLiF4 laser at 1053 nm. Mid-infrared (MIR) idler wave tuning from 2.2 μm to 10.4 μm is demonstrated with an angle-tuned type-I (o-ee) y-cut sample, highlighting the superior performance of this novel large bandgap chalcogenide nonlinear crystal to generate tunable coherent radiation over its full MIR transparency range (0.47 – 18 μm). The phase-matching data are used to identify the most accurate dispersion relations of this compound among three recently published Sellmeier equations. Damage threshold measurements yielded values as high as 2.04 J/cm2 at 100 Hz pulse repetition rate, one of the largest among existing MIR Χ(2) nonlinear materials.
|Journal||Journal of Physics Communications|
|Publication status||Submitted - 2018|
ASJC Scopus subject areas
- Physics and Astronomy(all)