物理学报2012,Vol.61Issue(1):235-241,7.
基于二阶保偏光纤Sagnac环光纤激光器的振动检测研究
A vibration detection system based on two-stage polarization maintaining fiber Sagnac loop fiber laser
摘要
Abstract
A novel fiber grating sensing technique utilized for vibration detection is proposed and experimentally demonstrated.A single wavelength laser is formed by polarization controllers and polarization maintaining fiber(PMF) to construct the high birefringence (Hi-Bi) Sagnac loop,PMF combined with erbium-doped fiber,single mode fiber and polarizer.The cantilever glued to an FBG is used as a sensor probe,and the linear edge of Sagnac ring laser are used to demodulate fiber optic seismic vibration signal.Sagnac ring theory and its edge effects are described in detail,and numerical simulation and experiment show that the vibration signal detection system is adjusted periodically in a range from L_1 to L_1 + L_2,sensitivity goes up to 38.2μW/nm of discrimination,the linearity is 0.9996,and the dynamic range is 40—70 dB,these meeting the requirements for vibration detection technical parameters.关键词
光纤光学/振动检测/保偏光纤Sagnac环/光纤激光器Key words
optical fiber/vibration detection/Hi-Bi PMF Sagnac loop/fiber laser分类
信息技术与安全科学引用本文复制引用
周锐,张菁,忽满利,冯忠耀,高宏,杨扬,张敬花,乔学光..基于二阶保偏光纤Sagnac环光纤激光器的振动检测研究[J].物理学报,2012,61(1):235-241,7.基金项目
国家自然科学基金(批准号:60727004 ()
61077060) ()
国家863计划(批准号:2007AA03Z413 ()
2009AA06Z203) ()
教育部科技创新工程重大项目 ()
科技部国际科技合作项目 ()
陕西省重大科技创新项目(2009ZKC01-19 ()
2008ZDGC-14) ()
西北大学研究生创新教育项目(批准号:09YZZ53)资助的课题~~ ()