光时域反射计
外差探测
瑞利散射
光学
物理
信号处理
振动
计算机科学
振幅
信号(编程语言)
数字信号处理
声学
光纤
光纤分路器
光纤传感器
激光器
计算机硬件
程序设计语言
作者
Zhengqing Pan,Kezhen Liang,Qing Ye,Haiwen Cai,Ronghui Qu,Zujie Fang
摘要
The digital coherent detection method is employed into the φ-OTDR. The heterodyne detection offers very high optical gain while the digital signal processing serves as an effective tool to rebuild the instantaneous electric field of Rayleigh scattering light by analyzing the beating signal. Both amplitude and phase signal are obtained in our experiment. PZT vibration measurement verifies that the phase difference signal well represents the external perturbation signal and also with higher SNR. The proposed newφ-OTDR system shows a good application foreground in the area of distributed vibration measurement.
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