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.

Efficient generation of few-cycle pulses beyond 10 μm from an optical parametric amplifier pumped by a 1-µm laser system.

Nonlinear vibrational spectroscopy profits from broadband sources emitting in the molecular fingerprint region. Yet, broadband lasers operating at wavelengths above 7 μm have been lacking, while traditional cascaded parametric frequency down-conversion schemes suffer from exceedingly low conversion efficiencies. Here we present efficient, direct frequency down-conversion of femtosecond 100-kHz, 1.

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.

Refined Sellmeier equations for BaGaS.

This paper reports refined Sellmeier equations for the biaxial nonlinear crystal that provide a good reproduction of the phase-matching angles for second-harmonic generation (SHG) and sum-frequency generation (SFG) of the mid-IR outputs of Nd:YAG and Ho:YLF laser-pumped optical parametric oscillators (OPOs) and a frequency-doubled laser in the 0.7584-8.018 µm range.

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.