Chinese Optics Letters, Vol. 7, Issue 3, 186 (2009)
Localization theory of distributed fiber vibration sensor
Weimin Chen1, Yuanyuan Xie1, Peng Zhang1, and Lei Lin1,2
- 1The Key Laboratory for Optoelectronic Technology &
- 2Systems, Ministry of Education of China, Chongqing University, Chongqing 4000442 Computer Science and Information Engineering College, Chongqing Technology and Business University, Chongqing 400067
Based on Sagnac interferometer, a simple distributed optical fiber sensing system with sub-loop is presented to monitor the vibration applied on the sensing fiber. By introducing a sub-loop, three output beams of interference with different delay time are gotten. Location of the vibration is analyzed through mathematical-physical equations. The vibration frequency, amplitude, and location are theoretically simulated. The results agree well with the previous experiments.