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
Yun-Long Li(李运龙), Bing-Chu Yang(杨兵初), Xue-Mei Xu(许雪梅)
Yun-Long Li(李运龙), Bing-Chu Yang(杨兵初), Xue-Mei Xu(许雪梅)
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.
中图分类号: (Laser spectroscopy)