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	Photothermal spectroscopy with hollow-core optical fiber
	JIN, WEI; CAO, YINGCHUN; YANG, FAN; HO, HOI LUT
	2017-12-19
著作权人	THE HONG KONG POLYTECHNIC UNIVERSITY SHENZHEN RESEARCH INSTITUTE
专利号	US9846118
国家	美国
文献子类	授权发明
其他题名	Photothermal spectroscopy with hollow-core optical fiber
英文摘要	The present invention provides a gas measuring method based on photothermal effect in hollow-core optical fiber comprising: filling a target gas into the core of a hollow-core optical fiber; coupling a probe light and a periodically modulated pump light into the hollow-core optical fiber; absorbing the pump light by the target gas resulting in the periodic modulation of the phase of the probe light; demodulating the phase modulation information of the probe light to obtain the concentration of the target gas, wherein the pump laser is wavelength and/or amplitude modulated. In the present invention, two lasers including a pump laser and a probe laser are used for the measurement, this approach is simple and practical. Also, the use of the hollow-core optical fiber with extremely-small core area greatly increases the optical power density, thus enhances the strength of the detected photothermal signal; this method allows ppb level gas measurement with high selectivity, and is universally suitable for the detection of gases with absorption in near-infrared.
公开日期	2017-12-19
申请日期	2016-04-13
状态	授权
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/34534]
专题	半导体激光器专利数据库
作者单位	THE HONG KONG POLYTECHNIC UNIVERSITY SHENZHEN RESEARCH INSTITUTE
推荐引用方式 GB/T 7714	JIN, WEI,CAO, YINGCHUN,YANG, FAN,et al. Photothermal spectroscopy with hollow-core optical fiber. US9846118. 2017-12-19.

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