Numerical Analysis of Coupling from Core Mode to Radiation Mode in Long Period Fiber Gratings

TONG Zhi; TAO Feng; WEI Huai; WANG Mu-guang; WANG Zhi; JIAN Shui-sheng

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Numerical Analysis of Coupling from Core Mode to Radiation Mode in Long Period Fiber Gratings

更新时间：2025-07-16

- Numerical Analysis of Coupling from Core Mode to Radiation Mode in Long Period Fiber Gratings
- Acta Electronica Sinica Vol. 31, Issue 1, Pages: 109-116(2003)
- 作者机构：
  
  北方交通大学光波技术研究所,北京,100044
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN253
- Published：2003
- 稿件说明：
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TONG Zhi, TAO Feng, WEI Huai, et al. Numerical Analysis of Coupling from Core Mode to Radiation Mode in Long Period Fiber Gratings[J]. Acta Electronica Sinica, 2003, 31(1): 109-116.
DOI：

TONG Zhi, TAO Feng, WEI Huai, et al. Numerical Analysis of Coupling from Core Mode to Radiation Mode in Long Period Fiber Gratings[J]. Acta Electronica Sinica, 2003, 31(1): 109-116. DOI：

摘要

我们根据耦合模理论和辐射模式理论针对长周期光纤光栅环境折射率高于包层折射率的情况建立了完整模型

并提出了一种新的数值方法求解辐射模耦合方程组

定量的分析了长周期光纤光栅中基模到辐射模的耦合特性

并总结了长周期光纤光栅透射谱特性随环境折射率的变化规律

与实验结果符合的很好.这种方法可以很容易推广到短周期布喇格光纤光栅的情况.

Abstract

In this paper we develop a complete model to simulate the properties of a long-period fiber grating whose cladding index is lower than the ambient refractive index based on coupled-mode theory and radiation-mode theory

and we also present a new method to solve the radiation-mode coupling equations numerically.The characteristics of coupling from core-mode to radiation-mode in a LPG is analysed

and the general rules are summarized

which agrees well with experimental results.In addition

this model can be easily applied to fiber Bragg gratings.

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Related Author

WANG Yi-ping

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Related Institution

State Key Laboratory on Local Fiber-Optic Communication Networks and Advanced Optical Communication Systems,Shanghai Jiaotong University

Department of Optoelectronic Engineering,Chongqing University

State Key Laboratory on Local Fiber-Optic Communication Networks and Advanced Optical Communication SystemsShanghai Jiaotong University Shanghai 200030China

Department of Optoelectronic EngineeringChongqing UniversityChongqing 400030China

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