J4 ›› 2011, Vol. 28 ›› Issue (6): 753-758.

• Optical Communication • Previous Articles    

A novel multi-mode interference photonic crystal wavelength division demultiplexer

ZHANG Xuan, LIAO Qing-Hua, YU Tian-Bao, LIU Nian-Hua   

  1. Department of Physics, Nanchang University, Nanchang 330047, China
  • Received:2010-10-14 Revised:2010-12-20 Published:2011-11-28 Online:2011-11-14

Abstract:

A novel wavelength division demultiplexer (WDDM) based on the multi-mode interference effect (MMI) in 2D photonic crystal is presented, and the device can separate three wavelengths effectively. We take 1310/1500/1550nm for example here; of course, it can be extended to other wavelengths by changing the structure parameters. In addition, it can be also used to realize the separation for 1310/1550nm alone. The structure of WDDM composes of three MMI regions, which can make two wavelengths get through and one wavelength reflect back. The transmissions are above 91%. At the same time, by virtue of the plane wave expansion (PWE) and finite-difference time-domain method (FDTD), we simulate the performance.

Key words: optical communication, photonic crystal, wavelength division demultiplexer, multi-mode interference effect, plane wave expansion method, finite-difference time-domain method

CLC Number: