Wideband silicon photonic polarization beamsplitter based on point-symmetric cascaded broadband couplers

We design and demonstrate a wideband silicon photonic polarization beamsplitter on a silicon-on-insulator platform. The device consists of two 3 dB broadband couplers cascaded in a point-symmetric network. The transverse electric (TE) and transverse magnetic (TM) modes are coupled to different outpu...

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Bibliographic Details
Published in:Optics express 2015-11, Vol.23 (23), p.29413-29422
Main Authors: Lu, Zeqin, Wang, Yun, Zhang, Fan, Jaeger, Nicolas A F, Chrostowski, Lukas
Format: Article
Language:English
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Summary:We design and demonstrate a wideband silicon photonic polarization beamsplitter on a silicon-on-insulator platform. The device consists of two 3 dB broadband couplers cascaded in a point-symmetric network. The transverse electric (TE) and transverse magnetic (TM) modes are coupled to different output ports due to a large difference between their coupling strengths. The device exhibits large isolation at both the two output ports, of more than 20 dB over a large bandwidth of 125 nm, and a small excess loss, of less than 0.5 dB for the entire C-band.
ISSN:1094-4087
1094-4087
DOI:10.1364/oe.23.029413