Sensitivity Improvement in Dual Comb Spectroscopy With Time-Programmed Electro-Optic Frequency Combs
We demonstrate the signal-to-noise ratio (SNR) and/or the recording speed improvement of dual comb spectroscopy (DCS) with time-programmed electro-optically modulated (EOM) frequency combs, in a simple all-fiber architecture. Unlike mode-locked laser based combs, where time-programming requires complex locking mechanisms, time-programming in EOM combs is simple and robust. Thus by directly engineering time-shifts into the pulse train of an EOM comb, the dead time of the interferogram signal in DCS is reduced. The utilized time-shifting technique is theoretically analyzed and the results are experimentally verified. A SNR improvement of 11.6 dB or a 13 times reduction in recording speed is demonstrated experimentally with this simple method. These results open new possibilities for improvement of SNR and/or recording speed of EOM-based multi-comb spectroscopic techniques.
Authors
- Pascal Szriftgiser (ORCID: https://orcid.org/0000-0002-7792-7256)
- Arnaud Mussot (ORCID: https://orcid.org/0000-0002-6428-9443)
- Debanuj Chatterjee (ORCID: https://orcid.org/0000-0002-8888-7990)
- Hervé Rigneault (ORCID: https://orcid.org/0000-0001-6007-0631)
- Siddharth Sivankutty (ORCID: https://orcid.org/0000-0001-5079-4409)
- Matteo Conforti (ORCID: https://orcid.org/0000-0002-7158-9188)
- Steven T. Cundiff (ORCID: https://orcid.org/0000-0002-7119-5197)
- Eve-Line Bancel
Institutions
- Centre National de la Recherche Scientifique (FR)
- Université de Lille (FR)
- University of Michigan (US)
- Institut Fresnel (FR)
- Centrale Méditerranée (FR)
- Laboratoire de Physique des Lasers, Atomes et Molécules (FR)
Publication Details
- Journal
- Journal of Lightwave Technology
- Published
- 2025-02-20
- DOI
- https://doi.org/10.1109/jlt.2025.3544461
- Citations
- 7
- Primary Topic
- Advanced Fiber Laser Technologies
- Type
- article
- Field-Weighted Citation Impact
- 8.73