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Scanning dual-microcomb spectroscopy
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DOI：10.1007/s11433-022-1920-6.png)
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Dual-comb spectroscopy (DCS) is a powerful tool in molecular spectroscopy benefiting from the advantages of high resolution and short measurement time. The recently developed soliton microcomb (SMC) can potentially transfer the dual-comb method to an on-chip platform. In this paper, we demonstrate DCS using two frequency scanning SMCs, termed scanning dual-microcomb spectroscopy (SDMCS). The two SMCs are generated by an auxiliary-assisted thermal balance scheme, and the pump laser frequency sweeps over one free spectral range of the microresonator (similar to 49 GHz) using a feedback control system. The proposed SDMCS has a spectral resolution of 12.5 MHz, which is determined by the minimum sweeping step of the pump laser. Using this SDMCS system, we perform three types of gas molecule absorption spectroscopy recognition and gas concentration detection. This study paves the way for integrated DCS with a high signal-to-noise ratio, high spectral resolution, and fast acquisition rate.
Keyword:
microresonator
soliton microcomb
dual-comb spectroscopy
molecular spectroscopy
gas sensing
07
07
Df
82
80
Dx
42
65
Tg
42
60
Da
42
82
-m
期刊
S
IF:
7.5
论文数:
3.9K
被引数:
7.4K
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Nonlinear calibration of frequency modulated continuous wave LIDAR based on a microresonator soliton comb.png)
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