光子晶体波导与微腔耦合的三通道波分复用器

A Three-channel WDM Based on Photonic Crystal Wave-guide and Micro-cavity Coupled

为了实现对光波有效的选择输出,并且使光波的带宽很小,设计了微腔耦合的三通道波分复用器。对该器件采用时域有限差分法和微腔与波导间耦合模进行研究。首先,根据微腔选择不同频率的光波,设计光子晶体滤波器模型。然后,基于光子晶体耦合模理论,由定向耦合波导和一个高品质因子微腔构成的波分复用器。最后,为了提高输出光的透射效率,在波分复用结构的主波导的输出端,增加五个介质柱,形成一个反射层。实验结果表明:此结构能够通过微腔选择不同频率的光波,经过优化设计后的波分复用模型,光波的透射率得到了提高,波长λ=1.763μm的光波达到透射率将近90%。在光子晶体中取多个微腔可以选择输出更多波长的光波,所以这种结构在光子晶体集成器件的制作上有很好的应用前景。

In order to achieve effective option for light output, and the bandwidth of the light is very small, a three-channel coupled micro-cavities WDM is designed and its applied finite difference time domain method and the micro-cavity coupling between the waveguide mode theory study. First, According to cavity chooses different light frequencies to design the photonic crystal filter model. Then, based on photonic crystal coupled mode theory, the directional coupler waveguide and a high quality factor micro-cavity constited WDM. Finally, to increase the output efficiency of light transmission, five additional dielectric rods put in the output of the main waveguide of the multiplexing structure and forming a reflecting layer. Experimental results indicate that the structure can choose different frequency micro-cavity light, the transmittance of light is improved after optimized WDM model, and the light wavelength λ =1.763μm transmittance reaches nearly 90%. Take several micro-cavities in the photonic crystal can select multiple output more wavelengths, so this structure in a photonic crystal integrated device manufacturing has good application prospects.