高速光子晶体调制器的设计与性能分析

摘要

A high speed modulator based on photonic crystals using the feature of the disappearing of the defect mode is presented in the paper. The optical wave is in 1550 nm. The modulator using a photonic crystal of triangular lattice with dielectric cylinder. On basis of the triangular lattice photonic crystal, the modulator uses the structure of direct coupling of point defects and line defects. The high-speed photonic crystal modulator based on a round point defect resonator is designed by introducing optical controlled GaAs as a tunanble material. It has an extinction ratio of 49.7 dB, insertion loss as low as 0.352 dB, modulation rate up to 296 Gbit/s.