Shortened Polarization Beam Splitters With Two Cascaded Multimode Interference Sections

@article{Jiao2009ShortenedPB,
  title={Shortened Polarization Beam Splitters With Two Cascaded Multimode Interference Sections},
  author={Yuqing Jiao and Daoxin Dai and Yaocheng Shi and Sailing He},
  journal={IEEE Photonics Technology Letters},
  year={2009},
  volume={21},
  pages={1538-1540}
}
This letter presents a design for shortening the length of a polarization beam splitter (PBS) by using two cascaded multimode interference (MMI) sections with different widths. By optimizing the MMI parameters, a short PBS of good performance is achieved. The total length of the PBS is reduced to about 1/28 of that of a conventional design. 
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