期刊论文详细信息
IEEE Photonics Journal 卷:9
Horizontal Directional Coupler Formed With Waveguides of Different Heights for Mode-Division Multiplexing
Kin Seng Chiang1  Kai Xin Chen1  Jie Yun Wu1  Wei Ke Zhao1 
[1] Key Laboratory of Optical Fiber Sensing and Communications, University of Electronic Science and Technology of China, Chengdu, China;
关键词: Directional coupler;    integrated optics;    mode multiplexer;    multiplexing;    optical waveguide;    polymer waveguide.;   
DOI  :  10.1109/JPHOT.2017.2731046
来源: DOAJ
【 摘 要 】

We propose a horizontal directional coupler formed with two parallel waveguides of different heights. By breaking the symmetry in both the horizontal and the vertical direction, this directional coupler can be designed to allow us coupling between any two spatial modes of a few-mode waveguide, regardless of their symmetry properties, whereas a conventional directional coupler formed with planar waveguides of equal heights only allows us coupling between two spatial modes of the same symmetry in the vertical direction. As an example, we design and fabricate such a directional coupler with polymer material for the (de)multiplexing of the LP01 and the LP11b mode, which have a symmetric and an antisymmetric field distribution in the vertical direction, respectively. Our typical fabricated device shows a coupling ratio higher than 95% in the wavelength range from 1530 to 1560 nm. The insertion losses for the LP01 and LP11b modes are 9.6 and 12.8 dB, respectively. The performance of the device is weakly sensitive to temperature variations. The proposed directional coupler is easy to fabricate and can be used as a basic structure for the implementation of mode-controlling devices for mode-division-multiplexing applications.

【 授权许可】

Unknown   

  文献评价指标  
  下载次数:0次 浏览次数:0次