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	Real-time trace gas sensor using a multi-mode diode laser and multiple line integrated cavity enhanced absorption spectroscopy
	RAO, GOTTIPATY; KARPF, ANDREAS
	2017-12-14
著作权人	ADELPHI UNIVERSITY
专利号	US20170356842A1
国家	美国
文献子类	发明申请
其他题名	Real-time trace gas sensor using a multi-mode diode laser and multiple line integrated cavity enhanced absorption spectroscopy
英文摘要	A highly sensitive trace gas sensor based on a Fabry-Perot semiconductor laser and cavity enhanced absorption spectroscopy is designed to be capable of measuring sub-ppb concentrations of trace gases in real time. The broad frequency range of the multi-mode Fabry-Perot semiconductor laser spans a large number of absorption lines of the species of interest enabling multiple line integrated absorption spectroscopy which improves the sensitivity of detection. Additionally, the broad wavelength range of the laser excites a large number of cavity modes simultaneously, thereby reducing the sensor's susceptibility to vibration and thermal fluctuations making it suitable for field based monitoring applications. Using a high finesse optical cavity also enhances the sensitivity of the sensor by providing large path lengths, on the order of kilometers, in a small volume. Relatively high laser power is used to compensate for the low coupling efficiency of a broad linewidth laser to the optical cavity.
公开日期	2017-12-14
申请日期	2017-06-02
状态	失效
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/57591]
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. Real-time trace gas sensor using a multi-mode diode laser and multiple line integrated cavity enhanced absorption spectroscopy. US20170356842A1. 2017-12-14.

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