弯曲光纤内信号提取的仿真分析
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摘要
针对光纤通信与传感系统中光纤内信号的提取问题,将基于弯曲光纤信号的提取方法及过程进行了理论仿真分析。通过理论推导获得了弯曲光纤内信号提取的理论模型;依据该模型,对提取信号功率、光纤参数和信号光参数间的关系进行仿真分析。仿真结果表明:光信号提取(泄露)功率与通信光波长呈指数上升关系,与纤芯半径、光纤相对折射率差和弯曲半径等呈指数下降关系。
Considering the problem of signal extraction in optical fiber communication and sensing system for fiber, this paper conducts systematic theoretical simulation analysis of signal extraction method and process based on optical fiber bending. A theoretical model of signal extraction in curved fiber is obtained through theoretical derivation; Based on the model, the relationship between the extracted signal power, fiber parameters and signal light parameters is simulated and analyzed. The simulation results show that the communication wavelength have an exponentially increasing relationship with the optical signal extration. The core radius, the relative refractive index difference of the optical fiber, and the bending radius have an exponentially decreasing relationship with the optical signal extraction power.
Considering the problem of signal extraction in optical fiber communication and sensing system for fiber, this paper conducts systematic theoretical simulation analysis of signal extraction method and process based on optical fiber bending. A theoretical model of signal extraction in curved fiber is obtained through theoretical derivation; Based on the model, the relationship between the extracted signal power, fiber parameters and signal light parameters is simulated and analyzed. The simulation results show that the communication wavelength have an exponentially increasing relationship with the optical signal extration. The core radius, the relative refractive index difference of the optical fiber, and the bending radius have an exponentially decreasing relationship with the optical signal extraction power.
引文
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[2]UEMATSU T,HIROTA H,KAWANO T,et al.Design of Temporary Optical Coupler Using Fiber Bending for Traffic Monitoring[J].IEEE Photonics Journal,2017,9(99):1-1.
[3]SHANEMAN K,GRAY S.Optical network security:technical analysis of fiber tapping mechanisms and methods for detection&prevention[C]//Military Communications Conference,October 31,2004,Monterey,USA.Piscataway:IEEE,2004:711-716.
[4]吴俊,赵四新.海底光缆窃听与反窃听技术分析[J].信息安全与通信保密,2006,28(1):89-91.
[5]FAUSTINI L,MARTINI G.Bend loss in single-mode fibers[J].Journal of Lightwave Technology,1997,15(4):671-679.
[6]陈晖,祝世雄.光纤通信窃听及其检测技术探讨[J].信息安全与通信保密,2012,34(1):61-63.
[7]SCHERMER R T,COLE J H.Improved Bend Loss Formula Verified for Optical Fiber by Simulation and Experiment[J].IEEE Journal of Quantum Electronics,2007,43(10):899-909.
[8]张勇,韩志辉.浅谈光纤的弯曲损耗[J].天津科技,2017,44(11):50-51.
[9]彭星玲,张华,李玉龙.光纤宏弯损耗性能影响因素的仿真研究[J].激光与红外,2014,44(10):1132-1136.
[10]FEDORCHENKO A I,TRAVNICEK Z,CHANG C L,et al.Viscosity measurement using fiber bend loss sensor[C].International Symposium on Optomechatronic Technologies,Octeber 29-31,2012,Paris France.Piscataway:IEEE,2013:1-5.
[11]MARCUSE D.Curvature loss formula for optical fibers[J].J.opt.soc.am,1976,66(3):216-220.
[12]FAUSTINI L,MARTINI G.Bend loss in single-mode fibers[J].Journal of Lightwave Technology,1997,15(4):671-679.
[13]MARCUSE D.Theory of Dielectric Optical Waveguides(Second Edition)[M].New York:Academic Press,1974.
[14]WELFORD W T.Light Transmission Optics[M].Princeton:Van Nostrand Reinhold Company,1972.
[15]王文龙,刁利,孔勇,等.弯曲多模光纤偏振相关损耗的研究[J].光通信技术,2014,37(3):50-52.