TDLAS-WMS based near-infrared methane sensor system using hollow-core photonic crystal fiber as gas-chamber

被引：47
作者：
He, Qixin [1 ,2 ]
Dang, Peipei [1 ]
Liu, Zhiwei [1 ]
Zheng, Chuantao [1 ,2 ]
Wang, Yiding [1 ]
机构：
[1] Jilin Univ, Coll Elect Sci & Engn, State Key Lab Integrated Optoelect, 2699 Qianjin St, Changchun 130012, Peoples R China
[2] Rice Univ, Elect & Comp Engn Dept, 6100 Main St, Houston, TX 77005 USA
来源：
OPTICAL AND QUANTUM ELECTRONICS | 2017年 / 49卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Fiber optics; Photonic crystal fiber; Infrared absorption spectroscopy; WAVELENGTH-MODULATION SPECTROSCOPY; TUNABLE DIODE-LASER; ABSORPTION-SPECTROSCOPY; MU-M; BANDGAP FIBERS; DFB LASER; SENSITIVITY;
D O I：
10.1007/s11082-017-0946-2
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A near-infrared methane (CH4) sensor system was implemented using a hollow-core photonic crystal fiber (HC-PCF) as gas-chamber. Coupling joints including ceramic ferrules and ceramic mating sleeve were used to realize butt coupling between hollow-core fiber and single-mode fiber. A near-infrared distribute feedback laser was used for CH4 detection based on wavelength modulation spectroscopy technique. CH4 measurements were conducted to derive the sensor-system performances. Using a 5.3 mW laser power and a 0.8 m-long HC-PCF, a minimum detection limit of similar to 8.7 ppm at 0.1 s averaging time was obtained and it can be further improved to 1.4 ppm at an averaging time of 10 s. A good linear calibration curve between the amplitude ratio (2f/1f) and the CH4 concentration was obtained within the concentration range of 0-1000 ppm. This sensor system shows potential applications in distributed field measurements on CH4 in industrial process control, environmental monitoring, etc.
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页数：11
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