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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Vol. 17, Iss. 12 — Dec. 1, 2000
  • pp: 2086–2094

Generation, shaping, and characterization of intense femtosecond pulses tunable from 3 to 20 μm

Robert A. Kaindl, Matthias Wurm, Klaus Reimann, Peter Hamm, Andrew M. Weiner, and Michael Woerner  »View Author Affiliations

JOSA B, Vol. 17, Issue 12, pp. 2086-2094 (2000)

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We report on an intense mid-infrared light source that provides femtosecond pulses on a microjoule energy level, broadly tunable in the 3–20-μm wavelength range with pulse durations as short as 50 fs at 5 μm. The pulses are generated by phase-matched difference-frequency mixing in GaSe of near-infrared signal and idler pulses of a parametric device based on a 1-kHz Ti:sapphire amplifier system. Pulse durations are characterized with different techniques including autocorrelation measurements in AgGaS<sub>2</sub>, two-photon absorption in InSb, and cross-correlation measurements with near-infrared pulses in a thin GaSe crystal. A subsequent zero-dispersion stretcher of high transmission allows for optimum pulse compression, a more detailed amplitude and phase characterization and, ultimately, amplitude shaping of the mid-infrared pulses.

© 2000 Optical Society of America

OCIS Codes
(190.2620) Nonlinear optics : Harmonic generation and mixing
(190.4970) Nonlinear optics : Parametric oscillators and amplifiers
(190.7220) Nonlinear optics : Upconversion
(230.4320) Optical devices : Nonlinear optical devices
(320.5540) Ultrafast optics : Pulse shaping
(320.7110) Ultrafast optics : Ultrafast nonlinear optics

Robert A. Kaindl, Matthias Wurm, Klaus Reimann, Peter Hamm, Andrew M. Weiner, and Michael Woerner, "Generation, shaping, and characterization of intense femtosecond pulses tunable from 3 to 20 μm," J. Opt. Soc. Am. B 17, 2086-2094 (2000)

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