Open AccessNear-infrared broadband dual-frequency-comb spectroscopy with a resolution beyond the Fourier limit determined by the observation time window
Author(s) -
Sho Okubo,
Yi-Da Hsieh,
Hajime Inaba,
Atsushi Onae,
Mamoru Hashimoto,
Takeshi Yasui
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.033184
Subject(s) - optics , fourier transform spectroscopy , spectral resolution , spectroscopy , resolution (logic) , broadband , fourier transform , materials science , terahertz radiation , fourier transform infrared spectroscopy , frequency comb , infrared , spectral line , physics , laser , quantum mechanics , astronomy , artificial intelligence , computer science
We performed broadband dual-frequency-comb spectroscopy in the near-infrared region with a much higher resolution than the Fourier limit by using discrete Fourier transforms and spectral interleaving. We observed the resonant spectrum of a Fabry-Perot cavity over a spectral range of 187 to 218 THz using this technique, and measured its free spectral ranges and finesses. The recorded spectrum includes cavity resonance lines with widths of about 2 MHz, which is much narrower than the resolution of 48 MHz determined by the observation time window.