title: Molecular fingerprint-region spectroscopy from 5 to 12  μm using an orientation-patterned gallium phosphide optical parametric oscillator.
abstract: We report a femtosecond optical parametric oscillator (OPO) based on the new semiconductor gain material orientation-patterned gallium phosphide (OP-GaP), which enables the production of high-repetition-rate femtosecond pulses spanning 5-12 μm with average powers in the few to tens of milliwatts range. This is the first example of a broadband OPO operating across the molecular fingerprint region, and we demonstrate its potential by conducting broadband Fourier-transform spectroscopy using water vapor and a polystyrene reference standard.
authors.forename: Luke
authors.initials: L
authors.lastname: Maidment
authors.forename: Peter G
authors.initials: PG
authors.lastname: Schunemann
authors.forename: Derryck T
authors.initials: DT
authors.lastname: Reid