Journal
OPTICS LETTERS
Volume 44, Issue 1, Pages 65-68Publisher
Optica Publishing Group
DOI: 10.1364/OL.44.000065
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Funding
- National Natural Science Foundation of China (NSFC) [61327812, 61620106015, 61735015, 61775132]
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Frequency-agile dual-comb spectroscopy (DCS) with electro-optic modulators (EOMs) promises to facilitate the implementation of DCS in many environmental applications. In this Letter, we demonstrate a 1 MHz resolution electro-optic dual-comb system with a measurement speed of 20 kHz. We generate an electro-optic frequency comb (EOFC) consisting of 50000 teeth with 1 MHz line spacing. Each comb tooth is well resolved by another EOFC with 2.5 GHz line spacing. We record transmittances of high Q-factor resonators within milliseconds. Our figure of merit is shown to be 36 times more sensitive than a configuration that would beat two combs of 1 MHz spacing. (C) 2018 Optical Society of America
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