Time-resolved dual-comb spectroscopy with a single electro-optic modulator
Abstract
Time-resolved near-infrared absorption spectroscopy of single non-repeatable transient events is performed at high spectral resolution with a dual-comb interferometer using a continuous-wave laser followed by a single electro-optic amplitude modulator. By sharing high-speed electrical/optical components, our spectrometer greatly simplifies the implementation of dual-comb spectroscopy and it offers a high mutual coherence time, measured up to 50-s, without any active stabilization system and/or data processing. The time resolution, which can be reconfigured a posteriori, is as short 100 microseconds in our experimental demonstration. For a span of 36 GHz, the mean signal-to-noise ratio of 80, at 100-MHz spectral resolution and 100-microsecond measurement time, enables the precise determination of the parameters of rovibrational lines, including intensity or concentration.
Cite
@article{arxiv.2105.06527,
title = {Time-resolved dual-comb spectroscopy with a single electro-optic modulator},
author = {Jeong Hyun Huh and Zaijun Chen and Edoardo Vicentini and Theodor W. Hänsch and Nathalie Picqué},
journal= {arXiv preprint arXiv:2105.06527},
year = {2021}
}
Comments
8 pages, 4 figures