title: Generation of infrared radiation by stimulated Raman scattering in para-hydrogen crystal at 5 K.
abstract: We report the preliminary results of our experiments with stimulated Raman scattering in para-hydrogen crystal aimed at developing a continuously tunable laboratory laser source of mid-infrared radiation. With laser pulses at 532 nm, a conversion efficiency for the first Stokes beam of as much as 20% in the forward direction was observed through a single-pass, 5-cm-long crystal. Generation of mid-infrared pulses at 4.5 microm was achieved by use of the output of a near-infrared pulsed laser (1.6 microm, 3 ns), and an absorption spectrum of gaseous CD4 molecules was successfully recorded. These results suggest use of the solid para-hydrogen Raman shifter as a promising light source for mid-infrared spectroscopy.
authors.affiliation: Division of Chemistry, Graduate School of Science, Kyoto University, Kyoto, Japan.
authors.forename: Mizuho
authors.initials: M
authors.lastname: Fushitani
authors.forename: Susumu
authors.initials: S
authors.lastname: Kuma
authors.forename: Yuuki
authors.initials: Y
authors.lastname: Miyamoto
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Katsuki
authors.forename: Tomonari
authors.initials: T
authors.lastname: Wakabayashi
authors.forename: Takamasa
authors.initials: T
authors.lastname: Momose
authors.forename: Andrey F
authors.initials: AF
authors.lastname: Vilesov