title: Controlled shaping of ultrafast electric field transients in the mid-infrared spectral range.
abstract: We experimentally demonstrate amplitude and phase shaping of femtosecond mid-infrared pulses in a range centered about 14 mum . Single pulses with a tailored optical phase and phase-locked double pulses are generated by phase-matched difference-frequency mixing in a GaSe crystal of near-infrared pulses shaped with a liquid-crystal modulator. The electric field transients are directly measured by free-space electro-optic sampling, yielding pulse durations of 200-300 fs. Our data are in good agreement with a model that describes phase-matched optical rectification.
authors: F
authors: F
authors: Eickemeyer
authors: R A
authors: RA
authors: Kaindl
authors: M
authors: M
authors: Woerner
authors: T
authors: T
authors: Elsaesser
authors: A M
authors: AM
authors: Weiner