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Optical frequency comb Faraday rotation spectroscopy

Author(s): Johansson, AC; Westberg, J; Wysocki, Gerard; Foltynowicz, A

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Abstract: © 2018, The Author(s). We demonstrate optical frequency comb Faraday rotation spectroscopy (OFC-FRS) for broadband interference-free detection of paramagnetic species. The system is based on a femtosecond doubly resonant optical parametric oscillator and a fast-scanning Fourier transform spectrometer (FTS). The sample is placed in a DC magnetic field parallel to the light propagation. Efficient background suppression is implemented via switching the direction of the field on consecutive FTS scans and subtracting the consecutive spectra, which enables long-term averaging. In this first demonstration, we measure the entire Q- and R-branches of the fundamental band of nitric oxide in the 5.2–5.4 µm range and achieve good agreement with a theoretical model.
Publication Date: 1-May-2018
Citation: Johansson, AC, Westberg, J, Wysocki, G, Foltynowicz, A. (2018). Optical frequency comb Faraday rotation spectroscopy. Applied Physics B: Lasers and Optics, 124 (5), 10.1007/s00340-018-6951-8
DOI: doi:10.1007/s00340-018-6951-8
ISSN: 0946-2171
Type of Material: Journal Article
Journal/Proceeding Title: Applied Physics B: Lasers and Optics
Version: Author's manuscript

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