Issue |
EPJ Web Conf.
Volume 287, 2023
EOS Annual Meeting (EOSAM 2023)
|
|
---|---|---|
Article Number | 07018 | |
Number of page(s) | 2 | |
Section | Topical Meeting (TOM) 7- Optical Frequency Combs | |
DOI | https://doi.org/10.1051/epjconf/202328707018 | |
Published online | 18 October 2023 |
https://doi.org/10.1051/epjconf/202328707018
Dual-comb interferometry using frequency shifting loops
Univ Rennes, CNRS, Institut FOTON - UMR 6082, F-35000 Rennes, France
* Corresponding author: hugues,guilletdechatellus@univ-rennes.fr
Published online: 18 October 2023
Dual-comb systems have demonstrated their potential for metrology, e.g. spectroscopy vibrometry or ranging [1], However, the implementation of dual-combs is often complex and generally requires substantial optical and optoelectronic hardware Here, we propose a simple and compact architecture based on a bidirectional frequency shifting loop, that provides more than I 00 mutually coherent comb lines The system makes use ofa CW laser and a slow electronic detection chain (10 MSa/s) We have implemented two configurations enabling dynamic multi-heterodyne interferometry at 20kHz: the first one makes use of acousto-optic frequency shifters, and allows highly sensitive distributed acoustic sensing along a fiber, The second one involves electro-optic frequency shifters, and enables ranging with a sub-mm resolution.
© The Authors, published by EDP Sciences, 2023
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