Coupled Local-Mode Theory for Strongly Modulated Long Period Gratings

被引：35

作者：

Jin, Long ^{[1
]}

Jin, Wei ^{[1
]}

Ju, Jian ^{[1
]}

Wang, Yiping ^{[2
]}

机构：

[1] Hong Kong Polytech Univ, Dept Elect Engn, Hong Kong, Hong Kong, Peoples R China

[2] Univ Southampton, Optoelect Res Ctr, Southampton SO17 1BJ, Hants, England

来源：

JOURNAL OF LIGHTWAVE TECHNOLOGY | 2010年 / 28卷 / 12期

关键词：

Coupled local-mode theory; long period grating; photonic crystal fiber; FIBER GRATINGS;

D O I：

10.1109/JLT.2010.2049252

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：

A method for modeling the mode-coupling process in strongly modulated long period gratings (LPGs) is reported. The method is based on calculating the variations of local-mode profiles and propagation constants over the perturbed regions and solving the coupled local-mode equations to obtain a quantitative description of the intermodal energy exchange. The mode-coupling process and the spectral characteristics of a CO laser-inscribed LPG in a photonic crystal fiber are numerically modeled and found in good agreement with the experimentally measured results. Compared with the methods based on the conventional coupled-mode and the mode-projection theories, the current method provides a more accurate description of the mode coupling process for LPGs with strong but slow-varying perturbations.

引用

页码：1745 / 1751

页数：7

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