title: Wideband silicon photonic polarization beamsplitter based on point-symmetric cascaded broadband couplers.
abstract: 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.
authors.forename: Zeqin
authors.initials: Z
authors.lastname: Lu
authors.forename: Yun
authors.initials: Y
authors.lastname: Wang
authors.forename: Fan
authors.initials: F
authors.lastname: Zhang
authors.forename: Nicolas A F
authors.initials: NA
authors.lastname: Jaeger
authors.forename: Lukas
authors.initials: L
authors.lastname: Chrostowski