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

Publication Type:

Journal Article


Optics Express, Volume 23, Issue 23, p.29413-29422 (2015)



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.

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Research Area(s): 
Photonics and Optics