Ultrasmall Overlapped Arrayed-Waveguide Grating Based on Si Nanowire Waveguides for Dense Wavelength Division Demultiplexing

A novel design for an ultrasmall arrayed-waveguide grating (AWG) demultiplexer based on a Si nanowire waveguide is presented. The two free propagation regions (FPRs) are overlapped so that the structure becomes more compact than the layout of a conventional design. Each half of an arrayed waveguide includes three straight sections and two bending sections, and all these sections are connected smoothly in sequence. Some recursive formulas for determining the geometrical parameters of the novel layout are derived. Numerical simulation results are given

[1]  Qianfan Xu,et al.  Experimental demonstration of guiding and confining light in nanometer-size low-refractive-index material. , 2004, Optics letters.

[2]  L. Vivien,et al.  Size influence on the propagation loss induced by sidewall roughness in ultrasmall SOI waveguides , 2004, IEEE Photonics Technology Letters.

[3]  Toshihiko Baba,et al.  Arrayed waveguide grating of 70×60 µm2 size based on Si photonic wire waveguides , 2005 .

[4]  T. Baehr‐Jones,et al.  Analysis of the tuning sensitivity of silicon-on-insulator optical ring resonators , 2005, Journal of Lightwave Technology.

[5]  T. Baba,et al.  Very Compact Arrayed-Waveguide-Grating Demultiplexer Using Si Photonic Wire Waveguides , 2004 .

[6]  Joseph H. Abeles,et al.  Direct measurement of nanoscale sidewall roughness of optical waveguides using an atomic force microscope , 2003 .

[7]  M.K. Smit,et al.  Extremely small AWG demultiplexer fabricated on InP by using a double-etch Process , 2004, IEEE Photonics Technology Letters.

[8]  Sailing He,et al.  Analysis of characteristics of bent rib waveguides. , 2004, Journal of the Optical Society of America. A, Optics, image science, and vision.

[9]  P. Dumon,et al.  Compact wavelength router based on a Silicon-on-insulator arrayed waveguide grating pigtailed to a fiber array. , 2006, Optics express.

[10]  Y. Hibino,et al.  Recent advances in high-density and large-scale AWG multi/demultiplexers with higher index-contrast silica-based PLCs , 2002 .

[11]  Takashi Goh,et al.  Design and applications of silica-based planar lightwave circuits , 1999 .

[12]  Sailing He,et al.  Analysis of the birefringence of a silicon-on-insulator rib waveguide. , 2004, Applied optics.

[13]  Qianfan Xu,et al.  Guiding and confining light in void nanostructure. , 2004, Optics letters.

[14]  K. P. Yap,et al.  Mode transformer for miniaturized optical circuits. , 2005, Optics letters.