title: Frequency-comb-referenced molecular spectroscopy in the mid-infrared region.
abstract: A simple method for absolute-frequency measurements of molecular transitions in the mid-IR region is reported. The method is based on a cw singly resonant optical parametric oscillator (SRO), which is tunable from 3.2 to 3.45 μm. The mid-IR frequency of the SRO is referenced to an optical frequency comb through its pump and signal beams. Sub-Doppler spectroscopy and absolute-frequency measurement of the P(7) transition of the ν3 band of CH4 are demonstrated.
authors: Centre for Metrology and Accreditation (MIKES), P. O. Box 9, FIN-02151 Espoo, Finland. markku.vainio@helsinki.fi
authors: Markku
authors: M
authors: Vainio
authors: Mikko
authors: M
authors: Merimaa
authors: Lauri
authors: L
authors: Halonen