title: Supercontinuum generation from 2 to 20 μm in GaAs pumped by picosecond CO₂ laser pulses.
abstract: We report on the generation of supercontinuum radiation from 2 to 20 μm in a 67 mm long GaAs crystal pumped by a train of 3 ps CO2 laser pulses. Temporal measurements indicate that sub-picosecond pulse splitting is involved in the production of such wide-bandwidth radiation in GaAs. The results show that the observed spectral broadening is heavily influenced by four-wave mixing and stimulated Raman scattering.
authors.forename: J J
authors.initials: JJ
authors.lastname: Pigeon
authors.forename: S Ya
authors.initials: SY
authors.lastname: Tochitsky
authors.forename: C
authors.initials: C
authors.lastname: Gong
authors.forename: C
authors.initials: C
authors.lastname: Joshi