A compact polarization demultiplexer (P-DEMUX) composed of a microring resonator in strip waveguides and two bus channels in slot waveguides is proposed and characterized. The modal indices of the TM modes for slot and strip waveguides have comparable values, while those for the TE modes show large differences. With these unique properties, the input TE mode can directly output from the through port with nearly neglected coupling, while the input TM mode can efficiently output from the drop port at the resonant wavelength. Results show that a P-DEMUX with a radius of 3.069 mu m is achieved, where the extinction ratios are similar to 29.85 and 24.23 dB, respectively, for TE and TM modes, and the insertion losses are similar to 0.45 and 0.26 dB, respectively, at the wavelength of 1550 nm. Moreover, fabrication tolerances to the structural parameters are investigated and field evolution along the propagation distance through the P-DEMUX is demonstrated. (C) 2014 Optical Society of America
展开▼
机译：提出并描述了一种紧凑的偏振解复用器（P-DEMUX），它由带状波导中的微环谐振器和缝隙波导中的两个总线通道组成。缝隙和带状波导的TM模式的模态指数具有可比较的值，而TE模式的模态指数具有较大的差异。具有这些独特的特性，输入TE模式可以几乎不考虑耦合地直接从直通端口输出，而输入TM模式可以在谐振波长从分出端口有效输出。结果表明，获得了半径为3.069μm的P-DEMUX，其中TE和TM模式的消光比分别类似于29.85和24.23 dB，插入损耗分别类似于0.45和0.26 dB ，在1550 nm的波长下。此外，研究了对结构参数的制造公差，并展示了沿通过P-DEMUX的传播距离的场演化。 （C）2014年美国眼镜学会
展开▼
