Photothermal spectroscopy with hollow-core optical fiber

OPT OpenIR > 半导体激光器专利数据库

	Photothermal spectroscopy with hollow-core optical fiber
其他题名	Photothermal spectroscopy with hollow-core optical fiber
	JIN, WEI; CAO, YINGCHUN; YANG, FAN; HO, HOI LUT
	2017-12-19
专利权人	THE HONG KONG POLYTECHNIC UNIVERSITY SHENZHEN RESEARCH INSTITUTE
公开日期	2017-12-19
授权国家	美国
专利类型	授权发明
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.
其他摘要	本发明提供一种基于中空光纤中的光热效应的气体测量方法，包括：将目标气体填充到空心光纤的纤芯中;将探测光和周期性调制的泵浦光耦合到空心光纤中;通过目标气体吸收泵浦光，导致探测光相位的周期性调制;解调探测光的相位调制信息以获得目标气体的浓度，其中泵浦激光器是波长和/或幅度调制的。在本发明中，使用包括泵浦激光器和探针激光器的两个激光器进行测量，这种方法简单实用。而且，使用具有极小芯区的空心光纤大大增加了光功率密度，从而提高了检测到的光热信号的强度;该方法可以高选择性地进行ppb级气体测量，并且普遍适用于近红外吸收气体的检测。
申请日期	2016-04-13
专利号	US9846118
专利状态	授权
申请号	US15/097732
公开（公告）号	US9846118
IPC 分类号	G01B9/02 \| G01N21/39 \| G02F1/11 \| G02B6/02 \| G01J3/45
专利代理人	-
代理机构	HAMRE, SCHUMANN, MUELLER & LARSON, P.C.
文献类型	专利
条目标识符	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[P]. 2017-12-19.

条目包含的文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
US9846118.PDF（768KB）	专利		开放获取	CC BY-NC-SA	请求全文