Guo Jingjing, Ding Yihang, Xiao Xiaosheng, Kong Lingjie, Yang Changxi
Opt Express. 2018 Jun 25;26(13):16147-16154. doi: 10.1364/OE.26.016147.
We demonstrate a novel and compact FBG interrogation system for multiplexed static strain sensing with a free running mode-locked fiber laser. Multiplexed FBG array in cascading are interrogated by coherent dual-comb pulses generated from a single fiber laser. Dual-comb spectroscopy is achieved with the fiber laser to precisely detect the strain-induced spectral shifts of the FBG sensors. Multi-point strain measurements are performed to characterize the proposed system, where a large dynamic range of 520 με with 0.5 με resolution is achieved.
我们展示了一种新颖且紧凑的用于复用静态应变传感的光纤布拉格光栅（FBG）询问系统，该系统采用自由运行锁模光纤激光器。级联的复用FBG阵列由单个光纤激光器产生的相干双梳状脉冲进行询问。利用该光纤激光器实现双梳光谱，以精确检测FBG传感器应变引起的光谱偏移。进行了多点应变测量以表征所提出的系统，该系统实现了520微应变的大动态范围以及0.5微应变的分辨率。
