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PUBLICATIONS

SINGLE-MODULATOR, DUAL COMB SERRODYNE SPECTROSCOPY

Published

Author(s)

Jasper Stroud, David Long, David Plusquellic

Abstract

Dual optical frequency comb spectroscopy allows for high speed, broadband measurements without any moving parts. Here, we combine differential chirp down conversion to probe large spectral bandwidths in the near-infrared (NIR) and serrodyne modulation to separate the positive and negative sidebands in a single modulator. As an initial demonstration we apply this approach to measure a sharp cavity resonance to illustrate the system performance. We then measure methane transitions in the near-infrared and compare the resulting spectra to models based upon the current spectroscopic databases. The serrodyne method has lower hardware requirements compared to many existing approaches and its simplicity enables a high degree of mutual coherence between the two combs. Further, this method is readily amenable to chip-scale photonic integration.
Citation
Optics Letters
Volume
49
Issue
14/15
Pub Type
Journals

Download Paper

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Keywords

Serrodyne, Dual comb spectroscopy, Methane
Spectroscopy and Greenhouse gas measurements

Citation

Stroud, J. , Long, D. and Plusquellic, D. (2024), SINGLE-MODULATOR, DUAL COMB SERRODYNE SPECTROSCOPY, Optics Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=957592 (Accessed October 12, 2025)

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Created July 3, 2024, Updated March 5, 2025
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