Wavelength modulation spectroscopy at 1530.32 nm for measurements of acetylene based on Fabry-Perot tunable filter

doi:10.1088/1674-1056/25/2/024208

中国物理B ›› 2016, Vol. 25 ›› Issue (2): 24208-024208.doi: 10.1088/1674-1056/25/2/024208

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇下一篇

Wavelength modulation spectroscopy at 1530.32 nm for measurements of acetylene based on Fabry-Perot tunable filter

Yun-Long Li(李运龙), Bing-Chu Yang(杨兵初), Xue-Mei Xu(许雪梅)

School of Physics and Electronics, Central South University, Changsha 410083, China

收稿日期:2015-05-24 修回日期:2015-08-21 出版日期:2016-02-05 发布日期:2016-02-05
通讯作者: Bing-Chu Yang E-mail:bingchuyang@csu.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 61172047 and 61071025).

Wavelength modulation spectroscopy at 1530.32 nm for measurements of acetylene based on Fabry-Perot tunable filter

Yun-Long Li(李运龙), Bing-Chu Yang(杨兵初), Xue-Mei Xu(许雪梅)

School of Physics and Electronics, Central South University, Changsha 410083, China

Received:2015-05-24 Revised:2015-08-21 Online:2016-02-05 Published:2016-02-05
Contact: Bing-Chu Yang E-mail:bingchuyang@csu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 61172047 and 61071025).

摘要/Abstract

摘要： Sensitive detection of acetylene (C₂H₂) is performed by absorption spectroscopy and wavelength modulation spectroscopy (WMS) based on Fiber Fabry-Perot tunable filter (FFP-TF) at 1530.32 nm. After being calibrated by Fiber Bragg Grating (FBG), FFP-TF is frequency-multiplexed and modulated at 20 Hz and 2.5 kHz respectively to achieve wavelength modulation. The linearity with 0.9907 fitting coefficient is obtained by measuring different concentrations in a 100 ppmv-400 ppmv range. Furthermore, the stability of the system is analyzed by detecting 50 ppmv and 100 ppmv standard gases for 2 h under room temperature and ambient pressure conditions respectively. The precision of 11 ppmv is achieved by calculating the standard deviation. Therefore, the measuring system of C₂H₂ detection can be applied in practical applications.

关键词: absorption spectroscopy, Fabry-Perot tunable filter, wavelength modulation, acetylene detection

Abstract: Sensitive detection of acetylene (C₂H₂) is performed by absorption spectroscopy and wavelength modulation spectroscopy (WMS) based on Fiber Fabry-Perot tunable filter (FFP-TF) at 1530.32 nm. After being calibrated by Fiber Bragg Grating (FBG), FFP-TF is frequency-multiplexed and modulated at 20 Hz and 2.5 kHz respectively to achieve wavelength modulation. The linearity with 0.9907 fitting coefficient is obtained by measuring different concentrations in a 100 ppmv-400 ppmv range. Furthermore, the stability of the system is analyzed by detecting 50 ppmv and 100 ppmv standard gases for 2 h under room temperature and ambient pressure conditions respectively. The precision of 11 ppmv is achieved by calculating the standard deviation. Therefore, the measuring system of C₂H₂ detection can be applied in practical applications.

Key words: absorption spectroscopy, Fabry-Perot tunable filter, wavelength modulation, acetylene detection

中图分类号: (Laser spectroscopy)

42.62.Fi

42.79.-e (Optical elements, devices, and systems) 42.87.-d (Optical testing techniques)

李运龙, 杨兵初, 许雪梅. Wavelength modulation spectroscopy at 1530.32 nm for measurements of acetylene based on Fabry-Perot tunable filter[J]. 中国物理B, 2016, 25(2): 24208-024208.

Yun-Long Li(李运龙), Bing-Chu Yang(杨兵初), Xue-Mei Xu(许雪梅). Wavelength modulation spectroscopy at 1530.32 nm for measurements of acetylene based on Fabry-Perot tunable filter[J]. Chin. Phys. B, 2016, 25(2): 24208-024208.

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Wavelength modulation spectroscopy at 1530.32 nm for measurements of acetylene based on Fabry-Perot tunable filter

Wavelength modulation spectroscopy at 1530.32 nm for measurements of acetylene based on Fabry-Perot tunable filter

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