基于偏振模干涉的光纤光栅动态应变解调系统  

A fiber Bragg grating interrogating dynamic strains sensor system based on interference of polarized mode

作　　者：郝文良[1] 甄胜来[1] 曹志刚[1] 吕亮[1] 彭军 俞本立[1] 

机构地区：[1]安徽大学光电信息获取与控制教育部重点实验室,安徽合肥230601 [2]北京市微技术研究所,北京100200

出　　处：《量子电子学报》2012年第4期507-512,共6页Chinese Journal of Quantum Electronics

基　　金：国家自然科学基金(60940022);教育部博士点基金(20093401110002);高校省级优秀青年人才基金(2011SQRL015)

摘　　要：基于保偏光纤中正交偏振模干涉,提出了一种简单、新颖的光纤光栅动态应变解调系统,并且通过实验证实了该方案的可行性。该解调系统光学核心部分仅由一段带有反射镜的高双折射光纤和一个光纤起偏器构成。实验中动态应变解调分辨率达到了0.5nε/(Hz)^(1/2),频率范围为0.1～7.9kHz微纳幅度振动信号获得了保真拾取。实验表明,该系统适合宽频率范围、微纳幅度的动态应变检测,为光纤光栅传感提供了一种简单、经济、适用范围更广的解调方案。A simple novel fiber Bragg grating interrogating system is proposed and experimentally demonstrated based on interference of polarized mode.The essential part of the system is only comprised of a high birefringence fiber with fiber reflector and a fiber polarizer.The vibration micro-nano signals from 0.1 Hz to 7.9 kHz were picked up with fidelity.Measurements of dynamic strains with resolutions of 0.5nε/（Hz）1/2 were demonstrated.The results show that the system is suitable for wide frequency range,micro-nano range of dynamic strain detection.This system potentially offers a low-cost and high-performance solution for the interrogation of FBG sensor.

关 键 词：纤维与波导光学 偏振模干涉 光纤光栅 动态应变 传感系统 

分 类 号：TN253[电子电信—物理电子学]