%0 Journal Article %J Optics Express %D 2015 %T Wideband silicon photonic polarization beamsplitter based on point-symmetric cascaded broadband couplers %A Lu, Zeqin %A Wang, Yun %A Zhang, Fan %A Jaeger, Nicolas %A Chrostowski, and Lukas %N 23 %P 29413-29422 %U https://www.osapublishing.org/oe/abstract.cfm?uri=oe-23-23-29413 %V 23 %X 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. %8 11/2015