Sub-20-fs pulses tunable across the visible from a blue-pumped single-pass noncollinear parametric converter
Optics Letters, Vol. 22, Issue 19, pp. 1494-1496 (1997)
http://dx.doi.org/10.1364/OL.22.001494
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Abstract
Femtosecond pulses with center wavelengths between 470 and 750 nm are generated in a single-stage type I BBO optical parametric amplifier pumped by a frequency-doubled 1-kHz Ti:sapphire amplifier. A high-quality white-light continuum is used as the seed. Pulse durations as short as 16 fs and pulse energies of as much as 11 µJ are observed. The quantum efficiency is ~25% for both 7- and 40-µJ pump pulses. This unique combination of ultrashort pulse duration and high conversion is made possible by noncollinear phase matching that permits a sufficiently large amplification bandwidth. Simultaneously the group velocities of the signal and the idler are effectively matched. As a result widely tunable sub-20-fs pulses can be generated in a nonlinear crystal as thick as 2 mm.
© 1997 Optical Society of America
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OCIS Codes
(140.0140) Lasers and laser optics : Lasers and laser optics
(140.4050) Lasers and laser optics : Mode-locked lasers
(190.0190) Nonlinear optics : Nonlinear optics
(190.4970) Nonlinear optics : Parametric oscillators and amplifiers
(320.0320) Ultrafast optics : Ultrafast optics
(320.2250) Ultrafast optics : Femtosecond phenomena
Citation
T. Wilhelm, J. Piel, and E. Riedle, "Sub-20-fs pulses tunable across the visible from a blue-pumped single-pass noncollinear parametric converter," Opt. Lett. 22, 1494-1496 (1997)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-22-19-1494
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