Complete leaky mode coupling in dual-core photonic crystal fibre based on the coupled-mode theory

This paper theoretically investigates the dependence of leaky mode coupling between inner core fundamental mode and outer core defect mode on phase and loss matching in pure silica dual-core photonic crystal fibres with the multi-pole method. The complete mode coupling can take place when both the p...

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Bibliographic Details
Published inChinese physics B Vol. 20; no. 6; pp. 237 - 242
Main Author 苑金辉 余重秀 桑新柱 张锦龙 周桂耀 侯蓝田
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.06.2011
Subjects
Cladding
Core loss
Crystal defects
Fibres
Joining
Leaky modes
Matching
Photonic crystals
光子晶体光纤
匹配条件
双核
基础
模式理论
模式耦合
泄漏模式
缺陷模式
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ISSN1674-1056
2058-3834
DOI10.1088/1674-1056/20/6/064101

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Summary:This paper theoretically investigates the dependence of leaky mode coupling between inner core fundamental mode and outer core defect mode on phase and loss matching in pure silica dual-core photonic crystal fibres with the multi-pole method. The complete mode coupling can take place when both the phase and loss matching conditions are satisfied at the avoided anti-crossing wavelength. It shows the influences of cladding structure parameters including the diameters of cladding air holes d1, diameters of outer core holes d2 and hole to hole pitch A on the characteristics of leaky modes coupling. The coupled-mode theory is used to analyse the mode transition characteristics and the complete coupling can be clearly indicated by comparing the real and imaginary parts of propagation constant of the leaky modes.
Bibliography:dual-core photonic crystal fibres, complete leaky mode coupling, multi-pole method coupled-mode theory
Yuan Jin-Hui, Yu Chong-Xiu, Sang Xin-Zhu, Zhang Jin-Long, Zhou Gui-Yao, and Hou Lan-Tian（a） Key Laboratory of Information Photonies and Optical Communications of Ministry of Education Beijing University of Posts and Telecommunications, P. O. Box 163, Beijing 100876, China b） Institute of Infrared Optical Fibres and Sensors, College of Information Science and Engineering Yanshan University, Qinhuangdao 066004, China
This paper theoretically investigates the dependence of leaky mode coupling between inner core fundamental mode and outer core defect mode on phase and loss matching in pure silica dual-core photonic crystal fibres with the multi-pole method. The complete mode coupling can take place when both the phase and loss matching conditions are satisfied at the avoided anti-crossing wavelength. It shows the influences of cladding structure parameters including the diameters of cladding air holes d1, diameters of outer core holes d2 and hole to hole pitch A on the characteristics of leaky modes coupling. The coupled-mode theory is used to analyse the mode transition characteristics and the complete coupling can be clearly indicated by comparing the real and imaginary parts of propagation constant of the leaky modes.
11-5639/O4
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ISSN:1674-1056
2058-3834
DOI:10.1088/1674-1056/20/6/064101