ZHANG Xin,JIAN Jia-wen,ZHENG Yan-gong,JIN Han,ZOU Jie.An optic fiber sensor for multiple gases based on fiber loop ring-down spectroscopy and microring resonator arrays[J].Optoelectronics Letters,2016,12(4):312-315 An optic fiber sensor for multiple gases based on fiber loop ring-down spectroscopy and microring resonator arrays Author Name Affiliation ZHANG Xin  Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo 315211, China  JIAN Jia-wen  Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo 315211, China  ZHENG Yan-gong  Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo 315211, China  JIN Han  Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo 315211, China  ZOU Jie  Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo 315211, China  Abstract:       A high-sensitivity sensor for multiple gases based on microring array filter and fiber loop ring-down spectroscopy system is proposed and demonstrated. The parameters of the resonators are designed so that the filtered signal from a broadband light source can be tuned with an absorption spectral line of gas. Therefore, through adding microring resonators horizontally and vertically, the number of target gases and filter range are increased. In this research, in the broad spectral range of about 0.9 μm, only the absorption spectral lines of target gases are filtered. The simulation results show that three target gases, CH4, CO2 and HF, can be simultaneously detected by the sensing system. Owing to the fiber loop ring-down spectroscopy, the whole system is optimized in mini-size and sensitivity, and we can choose different sensing methods to enhance the measurement accuracy for high and low concentration conditions. Hits: 3612 Download times: 0 View Full Text    Download reader