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

Zeqin Lu | Zendy; Yun Wang | Zendy; Fan Zhang | Zendy; Nicolas A. F. Jaeger | Zendy; Lukas Chrostowski | Zendy

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

Author(s) -

Zeqin Lu,

Yun Wang,

Fan Zhang,

Nicolas A. F. Jaeger,

Lukas Chrostowski

Publication year - 2015

Publication title -

optics express

Language(s) - Uncategorized

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.23.029413

Subject(s) - optics , wideband , broadband , silicon on insulator , beam splitter , polarization (electrochemistry) , coupling loss , physics , photonics , power dividers and directional couplers , bandwidth (computing) , transverse plane , silicon photonics , silicon , optoelectronics , optical isolator , insertion loss , materials science , telecommunications , optical fiber , laser , chemistry , structural engineering , computer science , engineering

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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