Fiber grating current array based on tunable fiber laser

摘要

A current sensor array which consists of tunable fiber laser, Giant Magnetostrictive Material (GMM) and fiber grating is presented. The long-haul experiment is operated on the basis of current sensor unit about 21km. In general, the results of the design of the system is credible and qualified for the designing demand. And then a current sensor array is composed of four current sensor units in 21km long-haul. The sensing properties of the wavelength divided multiplex (WDM) and time divided multiplex (TDM) is demonstrated. The wavelength resolution of the measurements is 0.002 nm and current resolution is 6.55mA, due to the high sensitivity photo detection system. While the work current go up from 1200mA to2300mA, Sensitivity of the wavelength will be maximum.