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	Ultra-sensitive, real-time trace gas detection using high-power, multi-mode semiconductor laser and cavity ringdown spectroscopy
	RAO, GOTTIPATY; KARPF, ANDREAS
	2018-11-01
著作权人	ADELPHI UNIVERSITY
专利号	WO2018200416A1
国家	世界知识产权组织
文献子类	发明申请
其他题名	Ultra-sensitive, real-time trace gas detection using high-power, multi-mode semiconductor laser and cavity ringdown spectroscopy
英文摘要	A highly sensitive trace gas sensor based on Cavity Ring-down Spectroscopy (CRDS) makes use of a high power, multi-mode Fabry-Perot (FP) semiconductor laser with a broad wavelength range to excite a large number of cavity modes and multiple molecular transitions, thereby reducing the detector's susceptibility to vibration and making it well suited for field deployment. The laser beam is aligned on-axis to the cavity, improving the signal-noise-ratio while maintaining its vibration insensitivity. The use of a FP semiconductor laser has the added advantages of being inexpensive, compact and insensitive to vibration. The technique is demonstrated using a laser with an output power of at least 200 mW, preferably over 0 Watt, (λ = 400 nm) to measure low concentrations of Nitrogen Dioxide (NO2) in zero air. For single- shot detection, 530 ppt sensitivity is demonstrated with a measurement time of 60 μs which allows for sensitive measurements with high temporal resolution.
公开日期	2018-11-01
申请日期	2018-04-23
状态	未确认
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/62581]
专题	半导体激光器专利数据库
作者单位	ADELPHI UNIVERSITY
推荐引用方式 GB/T 7714	RAO, GOTTIPATY,KARPF, ANDREAS. Ultra-sensitive, real-time trace gas detection using high-power, multi-mode semiconductor laser and cavity ringdown spectroscopy. WO2018200416A1. 2018-11-01.

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