< back to main site

Publications

Dual-comb mid-infrared spectroscopy with free-running oscillators and absolute optical calibration from a radio-frequency reference

Kara, O; Zhang, Z; Gardiner, T; Reid, D T (2017) Dual-comb mid-infrared spectroscopy with free-running oscillators and absolute optical calibration from a radio-frequency reference. Optics Express, 25 (14). pp. 16072-16082.

Full text not available from this repository.

Abstract

By using free-running independent femtosecond OPOs with a repetition-rate difference of 500 Hz we demonstrate methane absorption spectroscopy with spectral coverage simultaneously spanning the methane P, Q and R branches and with a resolution < 0.08 cm-1. Absolute wavelength calibration is achieved from simultaneous repetition-rate and carrierenvelope-offset frequency measurements. The calibration technique allows registration and averaging of consecutively acquired dual-comb spectra, leading to a high quality and low noise absorbance measurement in good agreement with the HITRAN database.

Item Type: Article
Subjects: Environmental Measurement > Atmospheric Science, Emission and Security
Divisions: Chemical, Medical & Environmental Science
Identification number/DOI: 10.1364/OE.25.016072
Last Modified: 06 Feb 2018 12:37
URI: http://eprintspublications.npl.co.uk/id/eprint/7681

Actions (login required)

View Item View Item