title: Generation of narrowband subpicosecond mid-infrared pulses via difference frequency mixing of chirped near-infrared pulses.
abstract: The widely used setup for the generation of femtosecond infrared (IR) pulses based on parametric amplifiers (OPAs) and difference frequency mixing (DFM) is extended to produce tunable narrowband mid-IR pulses. The insertion of pairs of silicon prisms after the OPA induces adjustable chirp, which leads to the generation of narrowband pulses in the DFM stage. Rapid tunability of the mid-IR wavelength via a computer-controllable actuator can be achieved in a range of approximately 200 cm(-1) at a bandwidth of the IR-pulses between approximately 15 and approximately 50 cm(-1) and pulse energies up to 0.4 microJ. The narrowband mid-IR pulses are well suited for 2D IR spectroscopy.
authors.affiliation: Lehrstuhl für BioMolekulare Optik, Department für Physik, Ludwig-Maximilians-Universität München, Oettingenstrasse 67, D-80538 München, Germany.
authors.forename: Florian O
authors.initials: FO
authors.lastname: Koller
authors.forename: Karin
authors.initials: K
authors.lastname: Haiser
authors.forename: Markus
authors.initials: M
authors.lastname: Huber
authors.forename: Tobias E
authors.initials: TE
authors.lastname: Schrader
authors.forename: Nadja
authors.initials: N
authors.lastname: Regner
authors.forename: Wolfgang J
authors.initials: WJ
authors.lastname: Schreier
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Zinth
mesh_terms: D000465:Algorithms; D000669:Amplifiers, Electronic; D004867:Equipment Design; D007259:Infrared Rays; D007368:Interferometry; D007834:Lasers; D015233:Models, Statistical; D008962:Models, Theoretical; D055095:Optics and Photonics; D019265:Spectroscopy, Near-Infrared / Q000295:instrumentation* / Q000379:methods*; D013997:Time Factors