Planar-type polarization beam splitter based on a bridged silicon waveguide coupler.

We demonstrate a compactly integrated polarization beam splitter (PBS) with high polarization extinction ratios greater than 20 dB over the full C-band wavelength range based on a simple bridged silicon nanowaveguide directional coupler. The PBS device is designed via three dimensional finite-difference time-domain (3D-FDTD) simulation, and fabricated experimentally. The optimum dimension of the bridge waveguide is determined to be 7.5-μm-long and 500 nm-wide for 250-nm thick silicon core. At the 1,550-nm wavelength, the measured polarization extinction ratios (PERs) of the PBS device are 22.5 dB and 22.9 dB for TE and TM polarization modes, respectively, and its corresponding insertion losses (ILs) are about 2.1 dB and 1.8 dB, both PERs and ILs within the maximum error range of ± 2.0 dB.

[1]  N. Dagli,et al.  A compact silicon-on-insulator polarization splitter , 2005, IEEE Photonics Technology Letters.

[2]  R. Thew,et al.  Pulsed source of spectrally uncorrelated and indistinguishable photons at telecom wavelengths. , 2014, Optics express.

[3]  Jong-Moo Lee,et al.  Enhanced four-wave-mixing effects by large group indices of one-dimensional silicon photonic crystal waveguides. , 2013, Optics express.

[4]  Jinghua Teng,et al.  An Ultracompact Directional Coupler Based on GaAs Cross-Slot Waveguide , 2010, IEEE Photonics Technology Letters.

[5]  Lech Wosinski,et al.  Ultracompact polarization beam splitter based on a dielectric-hybrid plasmonic-dielectric coupler. , 2012, Optics Letters.

[6]  Hiroshi Fukuda,et al.  Ultrasmall polarization splitter based on silicon wire waveguides. , 2006, Optics express.

[7]  H.K. Tsang,et al.  Integrated polarization beam splitter in high index contrast silicon-on-insulator waveguides , 2005, IEEE Photonics Technology Letters.

[8]  Sailing He,et al.  Proposal for an Ultracompact Polarization-Beam Splitter Based on a Photonic-Crystal-Assisted Multimode Interference Coupler , 2007, IEEE Photonics Technology Letters.

[9]  J. Bowers,et al.  Passive technologies for future large-scale photonic integrated circuits on silicon: polarization handling, light non-reciprocity and loss reduction , 2012, Light: Science & Applications.

[10]  Daoxin Dai,et al.  Extremely small polarization beam splitter based on a multimode interference coupler with a silicon hybrid plasmonic waveguide. , 2014, Optics letters.

[11]  Jie Sun,et al.  Four-port integrated polarizing beam splitter. , 2014, Optics letters.

[12]  S. Sygletos,et al.  1.14 Tb/s DP-QPSK WDM polarization-diverse optical phase conjugation. , 2014, Optics express.

[13]  Lech Wosinski,et al.  Polarization beam splitter based on a two-dimensional photonic crystal of pillar type , 2006 .

[14]  Daming Zhang,et al.  Ultrashort Polarization Splitter Using Two-Mode Interference in Silicon Photonic Wires , 2009 .