| Characteristics of Photonic Bandgap Fibres with Hollow Core＇s Inner Surface Coated by a Layer Material |
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| 引用本文： | 杜江兵 刘艳格 王志 刘占元 开桂云 董孝义. Characteristics of Photonic Bandgap Fibres with Hollow Core＇s Inner Surface Coated by a Layer Material[J]. 中国物理快报, 2008, 25(1): 164-167 |
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| 作者姓名： | 杜江兵 刘艳格 王志 刘占元 开桂云 董孝义 |
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| 作者单位： | Key laboratory of Opto-electronic Information and Technology, Ministry of Education and Institute of Modern Optics, Nankai University, Tianjin 300071 |
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| 基金项目： | Supported by the National Key Basic Research Programme of China under Grant No 2003CB314906, the National Natural Science Foundation of China under Grant No 10674074, and the Tianjin Natural Science Foundation under Grant No 06YFJZJC00300. |
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| 摘 要： | Hollow core＇s inner surface coating in a photonic bandgap fibre （PBCF） is investigated by means of finite element method. The coat material and thickness-dependence dispersion curve and group velocity dispersion are numerically studied. The coating with materials of low index or small thickness will rise up the dispersion curve but will not induce surface modes. However, coating with materials of high index or big coat thickness will induce surface modes and avoided-crossings. By varying coat material＇s refractive index and thickness, the appearances of surface modes and avoided-crossings can be changed. It is found that the avoided-crossing can enormously enlarge the negative dispersion which can find applications in dispersion compensation. We numerically achieve a negative dispersion as large as -21416.15ps/nm/km. The results give a physical insight into the propagation properties of PBGFs with the hollow core coated by a layer of material and are of crucial significance in the applications of PBGF coating.
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| 关 键 词： | 中空光纤 能带隙 内表面 涂层材料 |
| 收稿时间： | 2007-04-25 |
Characteristics of Photonic Bandgap Fibres with Hollow Core's Inner Surface Coated by a Layer Material |
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| DU Jiang-Bing,LIU Yan-Ge,WANG Zhi,LIU Zhan-Yuan,KAI Gui-Yun,DONGXiao-Yi. Characteristics of Photonic Bandgap Fibres with Hollow Core's Inner Surface Coated by a Layer Material[J]. Chinese Physics Letters, 2008, 25(1): 164-167 |
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| Authors: | DU Jiang-Bing LIU Yan-Ge WANG Zhi LIU Zhan-Yuan KAI Gui-Yun DONGXiao-Yi |
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| Affiliation: | Key laboratory of Opto-electronic Information and Technology, Ministry of Education and Institute of Modern Optics, Nankai University, Tianjin 300071 |
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| Abstract: | Hollow core's inner surface coating in a photonic bandgap fibre (PBGF) is investigated by means of finite element method. The coat material and thickness-dependence dispersion curve and group velocity dispersion are numerically studied. The coating with materials of low index or small thicknesswill rise up the dispersion curve but will not induce surface modes. However, coating with materials of high index or big coat thickness will induce surface modes and avoided-crossings. By varying coat material's refractive index and thickness, the appearances of surface modes and avoided-crossings can be changed. It is found that the avoided-crossing can enormously enlarge the negative dispersion which can find applications in dispersion compensation. We numerically achieve a negative dispersion as large as - 1416.15ps/nm/km. The results give a physical insight into the propagation properties of PBGFs with the hollow core coated by a layer of material and are of crucial significance in the applications of PBGF coating. |
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| Keywords: | 42.81.Qb 42.70.Qs |
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