Micro-degree Phase demodulation technique for fluorescence-based optical chemical oxygen sensor

摘要：

　　A phase detection technique for fluorescence-based optical chemical oxygen sensor is proposed.A phase of 0.01 degree can be distinguished to achieve 0.1% detected sensitivity of oxygen concentration.By simply subtracting the reference signal from the input signal, prior to lock-in amplifier ,the pure signal related to the phase difference can be extracted and amplify to increase the phase demodulation sensitivity.Experimental results validate the proposed technique, confirming it enormous possibilities in sensing application.

关键词： phase difference lock-in amplifier subtractor phase sensitivity

作者: Xi Chen Jun Chang Cun Guang Zhu Zong Liang Wang Yong Ning Liu Wei Wei Chuan Wu Jia Wang Fu Peng

作者单位: School of Information Science and Engineering and Shandong Province Key Laboratory of Laser Technology and Application, Shandong University, Jinan 250100, China

会议类型: 国内会议

会议名称: 光纤和光电子传感器及其安全应用国际会议(OFSIS2015)

会议地点: 济南

会议语种:英文

页码: 171-177

在线出版日期: 2015-01-20（万方平台首次上网日期，不代表论文的发表时间）