Signal line shapes of Fourier transform cavity-enhanced frequency modulation spectroscopy with optical frequency combs
Optics
2018-05-04 v1
Abstract
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, to the molecular line width, {\Gamma}. We compare a full model of the signals and a simplified absorption-like analytical model that has high accuracy for low f/{\Gamma} ratios and is much faster to compute. We verify the theory experimentally by measuring and fitting NICE-OFCS spectra of CO at 1575 nm using a system based on an Er:fiber femtosecond laser and a cavity with a finesse of ~11000.
Keywords
Cite
@article{arxiv.1609.06443,
title = {Signal line shapes of Fourier transform cavity-enhanced frequency modulation spectroscopy with optical frequency combs},
author = {Alexandra C. Johansson and Lucile Rutkowski and Amir Khodabakhsh and Aleksandra Foltynowicz},
journal= {arXiv preprint arXiv:1609.06443},
year = {2018}
}