摘要
分布式光纤传感器以光纤作为传输和传感融合的介质,具有高灵敏、全分布、大尺度、高分辨的独特优势,近年来受到多个应用领域研究人员的关注并逐步进入产业化。然而,现有普通单模光纤在传感信噪比与稳定性等方面仍存在局限性。以散射增强微结构特种光纤为传感载体,研究其分布式传感增效机理,介绍了其自动化、高效率刻写制备技术,并重点阐述了其分布式光纤传感技术研究进展与相关应用。进一步对散射增强微结构传感光纤的未来发展潜力及应用方向进行了展望。
Significance Information technology is the cornerstone that supports the development and social life of today's world,with its important component of sensing technology.Fiber optic sensing technology utilizes light waves as information carriers and transmission media to achieve the collection and measurement of signals in the environment.As an important branch of fiber optic sensing technology,distributed fiber optic sensing can achieve long-distance,high-resolution,and highly sensitive continuous distributed detection,obtaining two-dimensional spatio-temporal distribution information.Compared to the other two types of scattering distributed sensing,the system based on Rayleigh scattering features higher backscattering power and faster response and is more suitable for detecting dynamic and static signals such as sound waves and strain.With the increasing demands for engineering applications such as resource exploration,structural health monitoring,and underwater exploration,distributed fiber optic sensing has developed rapidly in recent years.At present,most distributed sensing systems usually employ single-mode fiber(SMF)as the sensing medium.However,its Rayleigh backscattering signals are extremely weak,resulting in poor signal-to-noise ratio(SNR)of sensing light,which in turn causes poor SNR of demodulation signals in distributed sensing systems.Additionally,the intensity fading effect induced by high laser coherence can cause sensing blind spots,and the light intensity fading can also result in poor sensing consistency among multi-channels.Meanwhile,due to the influence of optical transmission loss,the sensing SNR of ordinary non-amplification SMF optic systems is limited at long distances.The fully continuous characteristics of backscattering signals in optical SMFs can also result in mutual limitations between the system response bandwidth and sensing distance.Therefore,scattering enhanced special optical fibers are introduced into distributed sensing systems based on Rayleigh scattering.By continuously ch
作者
李豪
范存政
肖翔鹏
闫宝强
陈俊峰
吕悦娟
闫志君
孙琪真
Li Hao;Fan Cunzheng;Xiao Xiangpeng;Yan Baoqiang;Chen Junfeng;Lu Yuejuan;Yan Zhijun;Sun Qizhen(School of Optical and Electronic Information,National Engineering Research Center for Neat Generation Internet Access-System,Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology,Wuhan 430074,Hubei,China;School of Future Technology,Huazhong University of Science and Technology,Wuhan 430074,Hubei,China)
出处
《光学学报》
EI
CAS
CSCD
北大核心
2024年第1期165-179,共15页
Acta Optica Sinica
基金
国家自然科学基金(U22A20206,62305124)
国家重点研发计划(2022YFC2203904)
国家光电研究中心资助。
关键词
传感器
分布式光纤传感
散射增强光纤
分布式声波传感
光频域反射技术
sensors
distributed fiber optic sensing
scattering enhanced fiber
distributed acoustic sensing
optical frequency domain reflectometry
