Journal
OPTICS EXPRESS
Volume 25, Issue 25, Pages 31730-31738Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.25.031730
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Funding
- Japan Science and Technology Agency (JST) through the ERATO MINOSHIMA Intelligent Optical Synthesizer (IOS) [JPMJER1304]
- [16J02345]
- Grants-in-Aid for Scientific Research [16J02345, 17K14122, 15H05894, 17K14435] Funding Source: KAKEN
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In this study, we demonstrated an improvement in the detection sensitivity of dual-comb spectroscopy using the repetition rate multiplication of optical frequency combs. We compared the dual-comb signals in three dual-comb setups consisting of combinations of two combs with and without mode-filtering, and investigated how the repetition rate influences the signal-to-noise ratio (SNR) of dual-comb measurements. The dual-comb setups using high-repetition-rate combs enabled the absorption lines of HCN gas to be measured with a high SNR in a short averaging time, and real-time spectral data acquisition was realized using a low-sensitivity and low-resolution RF spectrum analyzer. (C) 2017 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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