波分复用分布式FBG传感网络

WDM distributed FBG sensor network

提出并实现了一种可满足工程实用要求的波分复用光纤光栅传感网络解决方案,系统通过可调谐光纤F P滤波器的连续扫描实现波长信号的解调,该传感系统扫描带宽50nm,单点工作带宽5nm,对一般应用系统每根单纤可设20～30个点,系统最高扫描频率200Hz,分辨力5pm(约5×10-6或0.5℃)。

A wavelength division multiplexed (WDM) FBG sensor network scheme catering for the practical requirements in projects is proposed and demonstrated.An optical fiber Fabry-Perot tunable filter(FFP-TF) is used in the system to demodulate the wavelength signals.The scanning bandwidth of the sensor system is 50nm and the working bandwidth of each point is 5nm.20-30 FBGs can be embedded in a single optical fiber in a (general) application system.The highest scanning frequency of the system is 200Hz and the resolution is 5pm(about 5×10^(-6) or 0.5℃).