Unlocking superior performance of broadband powerful mid-IR optical parametric amplifiers with a BaGaGeS crystal pumped at 1.24 µm.

We report on the development of a tunable (1.5-6.5 µm) femtosecond optical parametric amplifier (OPA) based on a novel, to the best of our knowledge, BaGaGeS (BGGS) crystal with a Cr:Forsterite pumping laser.

Temperature-dependent phase-matching properties of BaGaGeS in the 0.767-10.5910 µm spectral range.

We report experimental results on the temperature-dependent phase-matching properties of for second-harmonic generation and sum-frequency generation in the 0.7674-10.5910 µm range.

Second-order nonlinear optical coefficients of the monoclinic crystal BaGaSe.

We characterize the magnitude and relative signs of the second-order nonlinear optical coefficients of the biaxial crystal BaGaSe (BGSe) combining measurements of phase-matched and non-phase-matched second-harmonic generation at different wavelengths using slabs and a sphere.

Few-cycle mid-infrared pulses from BaGaGeSe.

(BGGSe) is a newly developed nonlinear material that is attractive for ultrabroad frequency mixing and ultrashort pulse generation due to its comparably low dispersion and high damage threshold. A numerical study shows the material's capacity for octave-spanning mid-infrared pulse generation up to 18 µm. In a first experiment, we show that a long crystal length of 2.