Dual electro-optic frequency comb spectroscopy using pseudo-random modulation | Zendy

Khaoula Fdil | Zendy; Vincent Michaud-Belleau | Zendy; Nicolas Bourbeau Hébert | Zendy; Philippe Guay | Zendy; Adam J. Fleisher | Zendy; Jean-Daniel Deschênes | Zendy; Jérôme Genest | Zendy

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Dual electro-optic frequency comb spectroscopy using pseudo-random modulation

Author(s) -

Khaoula Fdil,

Vincent Michaud-Belleau,

Nicolas Bourbeau Hébert,

Philippe Guay,

Adam J. Fleisher,

Jean-Daniel Deschênes,

Jérôme Genest

Publication year - 2019

Publication title -

optics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.524

H-Index - 272

eISSN - 1071-2763

pISSN - 0146-9592

DOI - 10.1364/ol.44.004415

Subject(s) - optics , frequency comb , modulation (music) , frequency modulation , phase modulation , spectroscopy , materials science , dual (grammatical number) , physics , phase noise , telecommunications , computer science , laser , radio frequency , art , literature , quantum mechanics , acoustics

An approach for dual-comb spectroscopy using electro-optic (EO) phase modulation is reported. Maximum-length pseudo-random binary sequences allow for energy-efficient and flexible comb generation. Self-correction of interferograms is shown to remove relative comb drifts and improve mutual coherence, even for EO combs derived from the same laser source. Methane spectroscopy is reported over a ∼10 GHz spectral range, limited by the modulators' bandwidth. The potential of a simple EO comb instrument is demonstrated to rapidly quantify atmospheric methane emissions with ppb precision over 1 km.

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