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

Sensitive detection of acetylene（C_2H_2） 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...

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Bibliographic Details
Published inChinese physics B Vol. 25; no. 2; pp. 200 - 204
Main Author 李运龙 杨兵初 许雪梅
Format Journal Article
LanguageEnglish
Published 01.02.2016
Subjects
Acetylene
Calibration
Fabry-Perot
Fibers
Spectroscopy
Standard deviation
Tunable filters
Wavelength modulation
乙炔
光纤布拉格光栅
可调谐滤波器
吸收光谱
拟合系数
波长调制光谱
测量系统
频率复用
Online AccessGet full text
ISSN1674-1056
2058-3834
1741-4199
DOI10.1088/1674-1056/25/2/024208

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Summary:Sensitive detection of acetylene（C_2H_2） 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 C_2H_2 detection can be applied in practical applications.
Bibliography:absorption spectroscopy, Fabry-Perot tunable filter, wavelength modulation, acetylene detection
Sensitive detection of acetylene（C_2H_2） 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 C_2H_2 detection can be applied in practical applications.
Yun-Long Li, Bing-Chu Yang, and Xue-Mei Xu（1 School of Physics and Electronics, Central South University, Changsha 410083, China）
11-5639/O4
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/25/2/024208