Influence of finite coherence of injected light on ring-down cavity measurement method and intensity integral method for ring-down time determination

doi:10.7498/aps.72.20230448

CORC > 力学研究所 > 中国科学院力学研究所 > 高温气体动力学国家重点实验室

	Influence of finite coherence of injected light on ring-down cavity measurement method and intensity integral method for ring-down time determination
	Huang, Zhi-Qiu 2,3; Zhang, Meng 2,3; Peng, Zhi-Min 2,3; Wang, Zhen 1; Yang, Qian-Suo 2,3
刊名	ACTA PHYSICA SINICA
	2023-09-20
卷号	72 期号:18 页码:10
关键词	cavity ring-down spectroscopy light coherence ring-down time intensity integration
ISSN号	1000-3290
DOI	10.7498/aps.72.20230448
通讯作者	Yang, Qian-Suo(qsyang@imech.ac.cn)
英文摘要	Using numerical simulation and a constructed cavity ring-down spectroscopy device, the influence of the finite coherence of the injected laser on the coupling process between the injected light and the cavity longitudinal mode is studied. The finite coherence of the injected light leads to the randomness of the coupling pulse during frequency scanning. The randomness is mainly reflected in two aspects. One is that as the coherence length decreases, the random amplitude range of the coupling pulse increases, and the other is that as the coherence of the injected light deteriorates, the coupling pulse changes from a single pulse with intensity evolution into continuous multiple pulses, and the overall width gradually increases with the decrease of the scanning rate. Moreover, with the deterioration of the coherence, when the light intensity of the cavity is used to turn off the injected light, the decrease in the scanning rate can cause more than one injection shut-off and ring-down event in a frequency coupling process, especially when scanning with the length of the cavity. In addition, a theoretical method is proposed to estimate the ring-down time by using the strength integral of different time intervals, and the relevant experimental verification is carried out. The experimental results show that the relative error of the ring-down time obtained by the intensity integration method is smaller than that obtained by the traditional fitting method.
WOS关键词	SPECTROSCOPY ; LASER ; SPECTROMETER ; ALGORITHM ; CRDS
WOS研究方向	Physics
语种	英语
WOS记录号	WOS:001089241700014
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/93294]
专题	力学研究所_高温气体动力学国家重点实验室
通讯作者	Yang, Qian-Suo
作者单位	1.Tsinghua Univ, Dept Energy & Power Engn, State Key Lab Power Syst, Beijing 100084, Peoples R China 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Key Lab Mech Fluid Solid Coupling Syst, Inst Mech, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Huang, Zhi-Qiu,Zhang, Meng,Peng, Zhi-Min,et al. Influence of finite coherence of injected light on ring-down cavity measurement method and intensity integral method for ring-down time determination[J]. ACTA PHYSICA SINICA,2023,72(18):10.
APA	Huang, Zhi-Qiu,Zhang, Meng,Peng, Zhi-Min,Wang, Zhen,&Yang, Qian-Suo.(2023).Influence of finite coherence of injected light on ring-down cavity measurement method and intensity integral method for ring-down time determination.ACTA PHYSICA SINICA,72(18),10.
MLA	Huang, Zhi-Qiu,et al."Influence of finite coherence of injected light on ring-down cavity measurement method and intensity integral method for ring-down time determination".ACTA PHYSICA SINICA 72.18(2023):10.