Signal line shapes of Fourier-transform cavity-enhanced frequency modulation spectroscopy with optical frequency combs
2017 (English)In: Journal of the Optical Society of America. B, Optical physics, ISSN 0740-3224, E-ISSN 1520-8540, Vol. 34, no 2, 358-365 p.Article in journal (Refereed) Published
We present a thorough analysis of the signal line shapes of Fourier-transform-based noise-immune cavity-enhanced optical frequency comb spectroscopy (NICE-OFCS). We discuss the signal dependence on the ratio of the modulation frequency, f(m), to the molecular linewidth, G. We compare a full model of the signals and a simplified absorption-like analytical model that has high accuracy for low f(m)/G ratios and is much faster to compute. We verify the theory experimentally by measuring and fitting the NICE-OFCS spectra of CO2 at 1575 nm using a system based on an Er: fiber femtosecond laser and a cavity with a finesse of similar to 11000.
Place, publisher, year, edition, pages
2017. Vol. 34, no 2, 358-365 p.
Atom and Molecular Physics and Optics
IdentifiersURN: urn:nbn:se:umu:diva-133206DOI: 10.1364/JOSAB.34.000358ISI: 000394028400019OAI: oai:DiVA.org:umu-133206DiVA: diva2:1088666