Dual-comb Spectroscopy for Laminar Premixed Flames with a Free-running Fiber Laser

doi:10.1080/00102202.2021.1879796

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	Dual-comb Spectroscopy for Laminar Premixed Flames with a Free-running Fiber Laser
	K. Xu; L. Ma; J. Chen; X. Zhao; Q. Wang; R. Kan; Z. Zheng and W. Ren
	2022
发表期刊	Combustion Science and Technology
ISSN	102202
卷号	194 期号:12 页码:2523-2538
摘要	Dual-comb spectroscopy (DCS) has emerged as an important new technique for high-resolution molecular spectroscopy. However, this powerful tool has not been widely utilized in combustion diagnostics due to the difficulty of maintaining the mutual coherence between the two comb sources. In this work, we demonstrated a free-running fiber-laser-based DCS for in situ and non-intrusive H2O and C2H2 measurements in laminar premixed flames. This picometer-resolution dual-comb spectroscopic system was developed by using a single erbium-doped fiber laser at 1.5m along with a multipass optical configuration for the enhanced absorption measurement. Because of the mutual coherence of the two comb pulse trains emitted from the same laser cavity, DCS could be performed without using any phase-locking systems. Absorption spectra of CH4/O2/air flames over the spectral range 6503 cm16535 cm1 were measured at different reactant flow rates and heights above the burner, showing a good agreement with the spectral simulation of high-temperature H2O using the HITEMP database. A noise equivalent (1) absorption coefficient of 9.5105 cm1 was achieved using the current DCS system. Besides, the dual-comb measurement of a C2H4/air sooting flame was also performed at the equivalence ratio =2.94 and compared with the spectral simulation of high-temperature H2O and C2H2. All the spectral data were retrieved by 1500 averages of interferograms to increase the spectral signal-to-noise ratio (SNR), but a single interferogram could be acquired at 0.83ms using the current free-running dual-wavelength fiber laser. 2021 Taylor & Francis Group, LLC.
DOI	10.1080/00102202.2021.1879796
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收录类别	ei
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文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/66577
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	K. Xu,L. Ma,J. Chen,et al. Dual-comb Spectroscopy for Laminar Premixed Flames with a Free-running Fiber Laser[J]. Combustion Science and Technology,2022,194(12):2523-2538.
APA	K. Xu.,L. Ma.,J. Chen.,X. Zhao.,Q. Wang.,...&Z. Zheng and W. Ren.(2022).Dual-comb Spectroscopy for Laminar Premixed Flames with a Free-running Fiber Laser.Combustion Science and Technology,194(12),2523-2538.
MLA	K. Xu,et al."Dual-comb Spectroscopy for Laminar Premixed Flames with a Free-running Fiber Laser".Combustion Science and Technology 194.12(2022):2523-2538.

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