摘要
报道了一种基于光纤激光器内腔调制的低探测极限折射率传感系统。将基于单模-无芯-单模的全光纤多模干涉结构作为损耗调制器件插入光纤激光器环形腔内,采用激光器内腔调制技术获得了高灵敏度、高信噪比、窄半峰全宽的传感信号,从而实现了低探测极限的折射率测量。系统的折射率探测极限可达7.3×10-7 RIU。该传感系统具有输出稳定、温度交叉敏感小的特点,在高精度生物化学传感、海洋环境监测等领域具有一定的应用潜力。
A fiber sensing system based on laser intracavity modulation with a low detection limit for refractive index sensing is proposed. A kind of all-fiber multimode interference structure based on single-mode-no-core-single-mode fiber is inserted in a fiber laser ring cavity as a loss-modulation device. The fiber laser intracavity modulation technology is used to obtain high-sensitivity sensing signal with high signal-to-noise ratio and narrow full width at half maximum. Depend on these characteristics, the low detection limit of the sensing system can reach up to 7.3×10-7 RIU. The sensing system with output stability and low temperature cross-sensitivity has a great potential in high-accuracy biochemical sensing and marine environmental monitoring.
作者
张超
徐德刚
石嘉
钟凯
李绪锦
熊建波
王胜年
任宇琛
陈霖宇
李长昭
刘铁根
姚建铨
Zhang Chao;Xu Degang;Shi Jia;Zhong Kai;Li Xujin;Xiong Jianbo;Wang Shengnian;Ren Yuchen;Chen Linyu;Li Changzhao;Liu Tiegen;Yao Jianquan(College of Precision Instrument and Opto-Electronics Engineering,Tianjin University,Tianjin 300072,China;Key Laboratory of Opto-Electronics Information Technology,Tianjin University,Ministry of Education, Tianjin 300027,China;Joint Laboratory for Ocean Observation and Detection,Pilot National Laboratory for Marine Science and Technology (Qingdao),Qingdao,Shandong 266237,China;CCCC Fourth Harbor Engineering Institute Co.,Ltd.,Guangzhou,Guangdong 510230,China;Key Laboratory of Harbor and Marine Structure Durability Technology of the Ministry of Communications, Guangzhou,Guangdong 510230,China)
出处
《中国激光》
EI
CAS
CSCD
北大核心
2018年第12期266-273,共8页
Chinese Journal of Lasers
基金
国家自然科学基金(61771332)
天津市科技计划项目(13ZCZDSF02300)
青岛海洋科学与技术国家实验室主任基金(QNLM201717)
关键词
传感器
折射率传感系统
探测极限
内腔调制
光纤激光器
sensor
refractive index sensing system
detection limit
intracavity modulation
fiber laser
