Abstract
We report the generation of ultrabroadband mid-infrared (mid-IR) pulses by noncollinear difference frequency mixing. The signal and the idler output beams of an optical parametric amplifier are combined in a silver thiogallate crystal () to generate mid-infrared radiation. We show that a noncollinear geometry facilitates broadband phase matching. Spectral bandwidths up to were obtained at an external noncollinear angle of 4.2 deg, which is more than three times broader than in a collinear geometry. The broadband spectrum is tunable in the range of . Pulse energies up to 1 μJ were achieved. The broadband pulses were used in sum frequency generation in ZnSe and in vibrational absorption spectroscopy experiments of liquid samples.
© 2018 Optical Society of America
Full Article | PDF ArticleMore Like This
Samuel B. Penwell, Lukas Whaley-Mayda, and Andrei Tokmakoff
Opt. Lett. 43(6) 1363-1366 (2018)
Giacomo Insero, Cecilia Clivati, Davide D’Ambrosio, Paolo De Natale, Gabriele Santambrogio, Peter G. Schunemann, Jean-Jacques Zondy, and Simone Borri
Opt. Lett. 41(21) 5114-5117 (2016)
Anthony Catanese, Jay Rutledge, Myles C. Silfies, Xinlong Li, Henry Timmers, Abijith S. Kowligy, Alex Lind, Scott A. Diddams, and Thomas K. Allison
Opt. Lett. 45(5) 1248-1251 (2020)