一种负曲率空芯光纤的设计与性质分析  

Design and property analysis of a negative-curvature hollow core fiber

作　　者：杨哲[1] 陈侃[1] 佘玄[1] 毕然[1] 王磊[1] 舒晓武[1] YANG Zhe;CHEN Kan;SHE Xuan;BI Ran;WANG Lei;SHU Xiaowu(College of Optical Science and Engineering,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]浙江大学光电科学与工程学院,杭州310027

出　　处：《中国惯性技术学报》2020年第5期660-665,共6页Journal of Chinese Inertial Technology

基　　金：浙江省自然科学基金资助(Q18F05000)。

摘　　要：针对光纤陀螺的应用,提出了一种双层反谐振负曲率空芯光纤。首先,利用时域有限差分法数值分析方法,建立光纤微结构模型,经优化设计取得了限制损耗0.063 dB/km且单模大模场的结构参数。同时,探索了保偏设计,通过调整内层两侧管环壁厚取得了在1 dB/km较低损耗量级上达到10^-5高双折射水平。最后,考察了光纤弯曲时弯曲半径与损耗的关系,为进一步优化设计奠定了基础。A double-layer anti-resonance negative-curvature hollow-core fiber is proposed.Firstly,the microstructure model is established by the numerical analysis method of finite-difference time-domain.After design,the structural parameters of limiting loss of 0.063 dB/km and large mode-field-diameter single-mode are obtained.The polarization maintaining design is explored.By adjusting the thickness of the inner tube ring on both sides of the inner layer,a high birefringence level of 10^-5 is achieved at a lower loss level of 1 dB/km.Finally,the relationship between the bending radius and the loss of the fiber is investigated,which lays a foundation for the further optimization design.

关 键 词：负曲率空芯光纤 反谐振 双折射 弯曲损耗 

分 类 号：TN253[电子电信—物理电子学]