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Optics Letters

Optics Letters


  • Vol. 23, Iss. 11 — Jun. 1, 1998
  • pp: 861–863

Femtosecond infrared pulses tunable from 9 to 18 μm at an 88-MHz repetition rate

R. A. Kaindl, D. C. Smith, M. Joschko, M. P. Hasselbeck, M. Woerner, and T. Elsaesser  »View Author Affiliations

Optics Letters, Vol. 23, Issue 11, pp. 861-863 (1998)

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Femtosecond mid-infrared laser pulses that are continuously tunable in the wavelength range from 9 to 18μm are demonstrated. These nearly bandwidth-limited pulses are generated by phase-matched difference-frequency mixing within the broad spectrum of 20-fs pulses from a mode-locked Ti:sapphire laser in GaSe. A direct determination of the pulse duration at 11.5μm gives a value of 140 fs. The average mid-infrared power of 1μW is ∼100 times greater than that for infrared generation by non-phase-matched optical rectification.

© 1998 Optical Society of America

OCIS Codes
(140.3070) Lasers and laser optics : Infrared and far-infrared lasers
(190.2620) Nonlinear optics : Harmonic generation and mixing
(190.7110) Nonlinear optics : Ultrafast nonlinear optics
(320.2250) Ultrafast optics : Femtosecond phenomena

R. A. Kaindl, D. C. Smith, M. Joschko, M. P. Hasselbeck, M. Woerner, and T. Elsaesser, "Femtosecond infrared pulses tunable from 9 to 18 μm at an 88-MHz repetition rate," Opt. Lett. 23, 861-863 (1998)

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