光学学报, 2011, 31 (5): 0506004, 网络出版: 2011-05-09   

内包层为负折射率介质双包层光纤的传输特性的研究

Investigation on Transmission Characteristics of Doubly Cladding Fiber with an Inner Cladding Made of Negative Refractive-Index Material
作者单位
1 兰州理工大学理学院, 甘肃 兰州 730050
2 东莞理工学院电子工程学院, 广东 东莞 523808
摘要
采用全矢量的方法,数值求解了内包层为左手材料,纤芯和外包层为常规材料的W型弱导双包层光纤的特征方程,分析了其模式分布、色散和时延特性。结果表明内包层为左手材料的双包层光纤具有许多不同于常规光纤的反常特性:单模传输模式只存在于特定的频率范围内;随着内包层负折射材料厚度的增加,同一模式同一频率下出现不同的传播常数;内包层厚度对单模的色散和群时延影响巨大,通过增大内包层厚度,可以达到-158000 ps/(nm·km)大负色散及极大的群时延。这些结果为设计新型色散补偿光纤及新型光纤器件提了供理论基础。
Abstract
The characteristic equation of a doubly cladding fiber with an inner cladding made of negative refractive index material is presented by full vectorial mode method. Its mode distribution, dispersion and time delay are demonstrated. The results indicate that this kind of fiber has some abnormal properties, such as the single mode existing in certain normal frequency. Along with increasing diameter of inner cladding, different propagation constants exist in the same mode and normalized frequency. The diameter of inner cladding has great influence on the dispersion and group time delay. The dispersion can reach -158000 ps/(nm·km) and group time delay can become very large by increasing the diameter of the inner cladding. These results provide theoretical basis for designing novel dispersion compensating fiber and photonic devices.
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侯尚林, 张书军, 黎锁平, 刘延君, 徐永钊. 内包层为负折射率介质双包层光纤的传输特性的研究[J]. 光学学报, 2011, 31(5): 0506004. Hou Shanglin, Zhang Shujun, Li Suoping, Liu Yanjun, Xu Yongzhao. Investigation on Transmission Characteristics of Doubly Cladding Fiber with an Inner Cladding Made of Negative Refractive-Index Material[J]. Acta Optica Sinica, 2011, 31(5): 0506004.

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