Unified Approach for Coupling to Cladding and Radiation Modes in Fiber Bragg and Long-Period Gratings

被引：17

作者：

Lu, Yu-Chun ^{[1
,2
]}

Yang, Li ^{[3
]}

Huang, Wei-Ping ^{[2
]}

Jian, Shui-Sheng ^{[1
]}

机构：

[1] Beijing Jiaotong Univ, Inst Lightwave Technol, Key Lab All Opt Network & Adv Telecommun Network, Minist Educ, Beijing 100044, Peoples R China

[2] McMaster Univ, Dept Elect & Comp Engn, Hamilton, ON L8S 4K1, Canada

[3] Univ Sci & Technol China, Dept Elect Engn & Informat Sci, Hefei 230027, Anhui, Peoples R China

来源：

JOURNAL OF LIGHTWAVE TECHNOLOGY | 2009年 / 27卷 / 11期

基金：

中国国家自然科学基金;

关键词：

Cladding mode; complex mode; complex mode matching method (CMMM); fiber Bragg gratings (FBGs); long-period fiber gratings (LPFGs); mode coupling; perfectly matched layer (PML); radiation mode; PERFECTLY MATCHED LAYERS; PHASE GRATINGS; DIFFRACTION GRATINGS; REFRACTIVE-INDEX; WAVE-GUIDES; CORE-MODE; FILTERS; PHOTOSENSITIVITY; SENSORS;

D O I：

10.1109/JLT.2009.2012725

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Couplings of core mode to guided cladding and un-guided radiation modes in fiber Bragg and long-period gratings are investigated by a unified approach based on complex mode matching method (CMMM). With the combination of the perfectly matched layer (PML) and the perfectly reflecting boundary (PRB), the continuous radiation modes can be well represented by a set of discrete complex modes so that simulation of coupling to radiation modes is greatly simplified and may be treated in the same fashion as guided modes. Numerical results of fiber Bragg and long-period gratings with refractive index of the outer cladding lower, equal, and higher than that of the inner cladding indicate that the unified approach is highly effective in the simulation of couplings to cladding and radiation modes.

引用

页码：1461 / 1468

页数：8

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