title: Femtosecond infrared pulses tunable from 9 to 18 mum at an 88-MHz repetition rate.
abstract: Femtosecond mid-infrared laser pulses that are continuously tunable in the wavelength range from 9 to 18mum 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 11.5mum gives a value of 140 fs. The average mid-infrared power of 1muW is ~100 times greater than that for infrared generation by non-phase-matched optical rectification.
authors: R A
authors: RA
authors: Kaindl
authors: D C
authors: DC
authors: Smith
authors: M
authors: M
authors: Joschko
authors: M P
authors: MP
authors: Hasselbeck
authors: M
authors: M
authors: Woerner
authors: T
authors: T
authors: Elsaesser