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

CORC > 长春光学精密机械与物理研究所 > 中国科学院长春光学精密机械与物理研究所

	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
刊名	Sensors and Actuators B-Chemical
	2020
卷号	303 页码:6
DOI	10.1016/j.snb.2019.127238
英文摘要	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).
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语种	英语
内容类型	期刊论文
源URL	[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.