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Architecture for microcomb-based GHz-mid-infrared dual-comb spectroscopy
- Source :
- Nature Communications, Nature Communications, Vol 12, Iss 1, Pp 1-8 (2021)
- Publication Year :
- 2021
- Publisher :
- Nature Publishing Group UK, 2021.
-
Abstract
- Dual-comb spectroscopy (DCS) offers high sensitivity and wide spectral coverage without the need for bulky spectrometers or mechanical moving parts. And DCS in the mid-infrared (mid-IR) is of keen interest because of inherently strong molecular spectroscopic signatures in these bands. We report GHz-resolution mid-IR DCS of methane and ethane that is derived from counter-propagating (CP) soliton microcombs in combination with interleaved difference frequency generation. Because all four combs required to generate the two mid-IR combs rely upon stability derived from a single high-Q microcavity, the system architecture is both simplified and does not require external frequency locking. Methane and ethane spectra are measured over intervals as short as 0.5 ms, a time scale that can be further reduced using a different CP soliton arrangement. Also, tuning of spectral resolution on demand is demonstrated. Although at an early phase of development, the results are a step towards mid-IR gas sensors with chip-based architectures for chemical threat detection, breath analysis, combustion studies, and outdoor observation of trace gases.<br />Chip-based architectures for mid-infrared gas sensing could enable many applications. In this direction, the authors demonstrate a microcomb-based dual-comb spectroscopy sensor with GHz resolution in the mid-IR band, with stability completely determined by a single high-Q microresonator.
- Subjects :
- Multidisciplinary
Materials science
Spectrometer
business.industry
Science
General Physics and Astronomy
Imaging and sensing
Soliton (optics)
General Chemistry
Chip
Solitons
General Biochemistry, Genetics and Molecular Biology
Spectral line
Article
Trace gas
Mid-infrared photonics
Optoelectronics
Sensitivity (control systems)
Spectral resolution
Frequency combs
business
Spectroscopy
Subjects
Details
- Language :
- English
- ISSN :
- 20411723
- Volume :
- 12
- Database :
- OpenAIRE
- Journal :
- Nature Communications
- Accession number :
- edsair.doi.dedup.....c0877be1d22bab13881e61324608438f