A Novel Demodulation Method for the Sagnac Interferometric Fiber Current Sensor

摘要：

The principle of All Fiber-Optical Current Transducer (AFOCT)was introduced.By analyzing the characteristic of photodetector s output signal,a novel demodulation scheme based on sine wave modulation was put forward,eliminating the effects induced by the change of light scource power and modulation depth. The measurement principle,processing method,and the thought of related circuit were also discussed.The delay,caused by data processing,was reduced to less than 50 ?s,improving the response speed of the total system.The experimental data show that the correlation coefficient is up to 0.998714

关键词： Fibre-optical current sensor Demodulation Sagnec

作者: Pei HuanDou Zu Jing Chen Hong

作者单位: North University of China,Electronic Engineering Department National Key Laboratory For Electronic Measurement Technology TaiYuan City,ShanXi Province

会议类型: 国际会议

会议名称: 第八届国际电子测量与仪器学术会议(Proceedings of 2007 8th International Conference on Electronic Measurement & Instruments)

会议地点: 西安

会议语种:英文

在线出版日期: 2007-08-16（万方平台首次上网日期，不代表论文的发表时间）