激光与光电子学进展, 2019, 56 (5): 050602, 网络出版: 2019-07-31
负曲率空芯光纤限制损耗的影响因素 下载: 1706次
Influence Factors of Confinement Loss of Negative Curvature Hollow Core Fiber
光纤光学 空芯光纤 限制损耗 有限元法 负曲率 嵌套环 fiber optics hollow core fiber confinement loss finite element method negative curvature nested tube
摘要
基于反谐振反射光波导模型和模式耦合模型分析了负曲率空芯光纤的导光机理,利用有限元法模拟计算了圆形管环负曲率空芯光纤的结构参数对基模限制损耗的影响。通过分析嵌套环优化基模限制损耗机理,发现嵌套环之间的空气层对反谐振反射也有贡献,且嵌套环在不同管环数量下对限制损耗优化的影响不同。设计了一种纤芯直径不超过20 μm的低限制损耗负曲率空芯光纤,其在1550 nm处的限制损耗小于1 dB/km,可保证单模传输。
Abstract
The light guiding mechanism of negative curvature hollow core fiber is analyzed based on anti-resonant reflected optical waveguide model and mode coupling model. Influence of structural parameters of circular tube negative curvature hollow core fiber on confinement loss of fundamental mode is simulated based on finite element method. Reduction reason of confinement loss of fundamental mode with nested tubes is considered, which is found that air layer between nested tubes has contribution to anti-resonant reflection, and nested tube has different potentials for confinement loss optimization under negative curvature fiber structure with different number of tubes. A negative curvature hollow core fiber with core diameter less than 20 μm is proposed with confinement loss less than 1 dB·km
-1 at 1550 nm, and single mode transmission can be maintained.
陈翔, 胡雄伟, 李进延. 负曲率空芯光纤限制损耗的影响因素[J]. 激光与光电子学进展, 2019, 56(5): 050602. Xiang Chen, Xiongwei Hu, Jinyan Li. Influence Factors of Confinement Loss of Negative Curvature Hollow Core Fiber[J]. Laser & Optoelectronics Progress, 2019, 56(5): 050602.