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Refractive index sensing based on chaotic correlation fiber loop ring down system using tapered fiber
IEEE Sensors Journal ( IF 4.3 ) Pub Date : 2020-04-15 , DOI: 10.1109/jsen.2019.2961693
Jun Tian , Lingzhen Yang , Chong Qin , Tianlong Wu , Juanfen Wang , Zhaoxia Zhang , Kang Li , Nigel Joseph Copner

A novel refractive index sensing using the tapered single mode fiber (TSMF) is proposed based on the chaotic correlation fiber loop ring down system (FLRDs). A chaotic fiber laser is used to drive the fiber loop cavity. The performance of the proposed TSMF chaotic correlation FLRDs refractive index sensing was demonstrated by measuring the ring down time of the peaks of correlation coefficient of the sensing system at different refractive index. The sensing demonstrates a good stability and repeatability. The influence of the change in fiber loop length on the sensing system was also investigated. The results show that the sensitivity of chaotic correlation FLRDs increases with the decrease of the loop length and the change of the loop length has little effect on the detection limit (DL) of the system. The DL of 10−4 RIU were achieved. Compared with the pulsed FLRDs, the chaotic correlation FLRDs significantly simplify the light source of sensing system and eliminate the trade-off problem between the length of fiber loop cavity and the light source, and makes fiber loop length more flexible.

中文翻译:

基于混沌相关光纤环路衰荡系统的锥形光纤折射率传感

基于混沌相关光纤环路衰荡系统 (FLRD),提出了一种使用锥形单模光纤 (TSMF) 的新型折射率传感。混沌光纤激光器用于驱动光纤环腔。通过测量不同折射率下传感系统相关系数峰值的衰减时间,证明了所提出的 TSMF 混沌相关 FLRD 折射率传感的性能。传感显示出良好的稳定性和可重复性。还研究了光纤环路长度变化对传感系统的影响。结果表明,混沌相关FLRDs的灵敏度随着环路长度的减小而增加,环路长度的变化对系统的检测限(DL)影响不大。实现了 10-4 RIU 的 DL。
更新日期:2020-04-15
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