提出了一种由2-D光子晶体构成的四信道波分复用系统.该系统包括利用光子晶体的线缺陷实现的波导部分和利用光子晶体微腔实现的频率选择部分.采用时域有限差分(FDTD)方法,研究了光在含点缺陷(即微腔)和线缺陷(即波导)的光子晶体中的传输特性,并给出了仿真结果.计算结果表明,该结构可以实现波长为λ=1550nm附近的四信道波分复用.

A four-channel wavelength-division-multiplexing system consisting of a 2-D photonic crystal is proposed. The system consists of two parts, a waveguiding element realized by line defects in the photonic crystal, and a frequency-selective element realized by photonic crystal microcavities. The transmission characteristics of light wave in photonic crystals including point defects and line defects are also analyzed by using the finite-difference time-domain method, and the simulation results are given, which show the ability to filter an incident pulse into four spectral channels with wavelength of 1550nm.