Sub-ppm CO detection in a sub-meter-long hollow-core negative curvature fiber using absorption spectroscopy at 2.3 mu m

doi:10.1016/j.snb.2019.127238

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	Sub-ppm CO detection in a sub-meter-long hollow-core negative curvature fiber using absorption spectroscopy at 2.3 mu m
	C. Y. Yao,L. M. Xiao,S. F. Gao,Y. Y. Wang,P. Wang,R. F. Kan,W. Jin and W. Ren
	2020
发表期刊	Sensors and Actuators B-Chemical
卷号	303 页码:6
摘要	We demonstrated the sensitive CO detection in a novel hollow-core negative curvature fiber (HC-NCF) with infrared laser absorption at 2.3 mu m. The HC-NCF consists of a single ring of eight nontouching silica capillaries around the air core, providing a single-mode light delivery of the 2.3-mu m distributed feedback laser. A high coupling efficiency of 90% was achieved with the aid of optimal free-space coupling optics. The hollow-core fiber was used as a gas cell for gas absorption measurement of a total path length of 85 cm. Both direct absorption spectroscopy (DAS) and wavelength modulation spectroscopy (WMS) were adopted to demonstrate the sensor performance by detecting the CO line R(10) at 4297.7 cm(-1). In scanned-wavelength DAS, we obtained a minimum detection limit (MDL) of 13 ppm CO, which was limited mainly by the existing mode noise in the HC-NCF. By applying a pressure difference of 0.8 bar between the two ends of the fiber, we demonstrated a very short gas loading time of only 5 s. Finally, we achieved a MDL of 0.4 ppm CO using the WMS technique, corresponding to a noise equivalent absorption of 1.6 x 10(-7) cm(-1).
DOI	10.1016/j.snb.2019.127238
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收录类别	SCI
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/64926
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	C. Y. Yao,L. M. Xiao,S. F. Gao,Y. Y. Wang,P. Wang,R. F. Kan,W. Jin and W. Ren. Sub-ppm CO detection in a sub-meter-long hollow-core negative curvature fiber using absorption spectroscopy at 2.3 mu m[J]. Sensors and Actuators B-Chemical,2020,303:6.
APA	C. Y. Yao,L. M. Xiao,S. F. Gao,Y. Y. Wang,P. Wang,R. F. Kan,W. Jin and W. Ren.(2020).Sub-ppm CO detection in a sub-meter-long hollow-core negative curvature fiber using absorption spectroscopy at 2.3 mu m.Sensors and Actuators B-Chemical,303,6.
MLA	C. Y. Yao,L. M. Xiao,S. F. Gao,Y. Y. Wang,P. Wang,R. F. Kan,W. Jin and W. Ren."Sub-ppm CO detection in a sub-meter-long hollow-core negative curvature fiber using absorption spectroscopy at 2.3 mu m".Sensors and Actuators B-Chemical 303(2020):6.

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