A novel fiber Fabry-Perot filter based mixed-gas sensing system

作者：Ding Hui^*; Liang Jianqi; Cui Junhong; Wu Xiangnan

来源：Sensors and Actuators B: Chemical , 2009, 138(1): 154-159.

DOI：10.1016/j.snb.2009.02.019

• Fiber Fabry-Perot filter
• Wavelength modulation
• Fiber Bragg gratings (FBGs)
• Mixed-gas sensing

A practical mixed-gas sensing system utilizing a fiber Fabry-Perot (FFP) filter and Fiber Bragg Gratings (FBG) was developed. By modulating the transmission wavelength of FFP within the width of one absorption line of the target gas, the system can detect different kinds of gaseous species selectively. A FBG with center wavelength being aligned to the absorption peak of the target gas was employed as wavelength reference to make the transmission wavelength of FFP modulate stably in a required region. The properties of the proposed system were demonstrated experimentally by simultaneous detection of acetylene (C(2)H(2)) and carbon monoxide (CO). Approximate linear relationships between the system responses and the input gas concentrations were demonstrated by experiments. The minimum detectable C(2)H(2) and CO concentration of similar to 15 ppm and similar to 300 ppm were also achieved by experiments respectively.

• 出版日期2009-4-24
• 单位西安交通大学