Frequency-comb-referenced molecular spectroscopy in the mid-infrared region

Markku Vainio, Mikko Merimaa, Lauri Halonen

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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 {\nu}3 band of CH4 are demonstrated.
Original languageEnglish
Pages (from-to)4122-4124
JournalOptics Letters
Volume36
Issue number21
DOIs
Publication statusPublished - 2011
MoE publication typeA1 Journal article-refereed

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