Femtosecond traveling-wave parametric generation with lithium triborate

Year: 1993

Authors: Banfi G.P., Danielius R., Di Trapani P., Foggi P., Righini R., Piskarskas A.

Autors Affiliation: Department of Electronics, University of Pavia, Pavia, 27100, Italy; Laser Research Center, Vilnius University, Vilnius, 2054, Lithuania; Department of Physics, University of Milano at Como, Como, 22100, Italy; European Laboratory for Nonlinear Spectroscopy, Florence, 50125, Italy

Abstract: Ultrashort pulses, of the same time duration as the pump pulse, have been obtained with a traveling-wave parametric generator employing a temperature-tuned lithium triborate crystal in noncritical phase matching. Starting from a 190-fs pulse at 0.6 µm generated by a dye laser, we achieved an overall conversion efficiency of 10-15% in the tuning range 0.85–0.97 µm (and the corresponding range of 1.6–2.1 µm) with a pump energy of only 30 µJ. The easy operation in the femtosecond regime and the minimal energy requirements that we found are due to the small group-velocity mismatch of lithium triborate at this pump wavelength and to the absence of walk-off.

Journal/Review: OPTICS LETTERS

Volume: 18 (19)      Pages from: 1633  to: 1635

KeyWords: Boron compounds; Crystalline materials; Lithium compounds; Spectroscopy; Waves, Barium borate; Lithium triborate; Traveling wave parametric generators, Pumping (laser)
DOI: 10.1364/OL.18.001633

Citations: 18
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