J4 ›› 2011, Vol. 28 ›› Issue (4): 507-512.

• 纤维与波导光学 • 上一篇    

基于液体选择填充光子晶体光纤的波分解复用器研究

李建华,王荣,汪井源,徐智勇,赵继勇   

  1. 解放军理工大学通信工程学院,江苏 南京 210007
  • 收稿日期:2010-09-27 修回日期:2010-11-10 出版日期:2011-07-28 发布日期:2011-07-06
  • 通讯作者: 王荣(1962-),教授,博士生导师。主要从事OCDMA、光子晶体光纤、ASON方面的研究。 E-mail:wr-njice@163.com
  • 作者简介:李建华 (1976-),解放军理工大学通信工程学院讲师,博士生。主要研究方向:光通信、光子晶体光纤。E-mail:ljhice@163.com
  • 基金资助:

    江苏省自然科学基金(BK2008089) 、“区域光纤通信网与新型光通信系统”国家重点实验室开放基金(2008SH07)、国家自然科学基金(60871075) 资助项目

A novel wavelength-division demultiplexer based on selectively liquid-filled photonic crystal fibers

LI Jianhua, WANG Rong, WANG Jingyuan, XU Zhiyong, ZHAO Jiyong   

  1. Institute of Communications Engineering, PLA University of Science and Technology, Nanjing  210007, China
  • Received:2010-09-27 Revised:2010-11-10 Published:2011-07-28 Online:2011-07-06

摘要:

设计了一种基于液体选择填充三芯光子晶体光纤的1.31/1.55um波分解复用器。中间为缺失一个空气孔的普通二氧化硅纤芯,左右两纤芯填充了不同折射率的液体材料。根据光纤的消逝场耦合的模式理论,不对称相邻波导存在波长相关耦合。不同填充折射率的两纤芯与中间纤芯分别耦合,构成两个不同响应波长的光滤波器。通过选择合适光纤长度,可实现不同波长光的分离。采用全矢量有限元法分析了光纤的传输特性,讨论了填充不同折射率液体时波导间的模式耦合,得到了其匹配波长与耦合长度。基于光束传播法仿真发现,长度为4.88 mm的光纤能实现1.31/1.55 um波长光的解复用。

关键词: 纤维与波导光学, 波分解复用器, 有限元法, 液体填充光子晶体光纤, 光束传播法

Abstract:

A novel 1.31/1.55um wavelength-division demultiplexer based on selectively liquid-filled three-core photonic crystal fibers (PCFs) is proposed. It consists of a normal central silica core and other two cores selectively filled with different refractive indices of liquid materials. According to coupling mode theory, wavelength-selective coupling of evanescent fields between nonidentical single-mode fibers happens as the propagation constants of two adjacent cores are equal at a particular wavelength. There are two corresponding wavelengths in three-core PCFs and then two beams of light with different wavelength can be separated from each other if appropriate parameters are chosen. Full-vectorial finite element method (FEM) is employed to analyze the properties of PCFs and simulate its coupling wavelength and length with different filled refractive indices. Numerical results by beam propagation method (BPM) demonstrate that it is possible to obtain a 4.88 mm-long 1.31/1.55 um wavelength-division demultiplexer.

Key words: fiber and waveguide optics, wavelength-division demultiplexer, finite element method, liquid-filled photonic crystal fibers, beam propagation method

中图分类号: