Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Signal line shapes of Fourier transform cavity-enhanced frequency
  modulation spectroscopy with optical frequency combs   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 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${_m}$/{\Gamma} ratios and is much faster
to compute. We verify the theory experimentally by measuring and fitting
NICE-OFCS spectra of CO${_2}$ at 1575 nm using a system based on an Er:fiber
femtosecond laser and a cavity with a finesse of ~11000.

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The categories of this paper are: atom-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: quant-ph
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The categories of this paper are: comp-gas
2
The categories of this paper are: math
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The categories of this paper are: q-alg
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The categories of this paper are: chem-ph
5
The categories of this paper are: gr-qc
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The categories of this paper are: q-fin
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The categories of this paper are: dg-ga
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The categories of this paper are: ao-sci
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The categories of this paper are: adap-org
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The categories of this paper are: hep-th
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The categories of this paper are: hep-lat
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The categories of this paper are: chao-dyn
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The categories of this paper are: mtrl-th