17 November 2010 Theoretical analysis of a novel polarization-insensitive AWG demultiplexer based on Si nanowire and slot waveguides
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Abstract
A new design for polarization-insensitive silicon-on-insulator (SOI) arrayed waveguide grating (AWG) is proposed. In arrayed waveguide region, Si nanowire waveguides and slot waveguides are combined to adjust the optical path differences. For the slot waveguides, the refractive indices of the TE and TM polarizations satisfy nTM>nTE while in the Si nanowire waveguides nTM<nTE, so the refractive indices of the TE and TM polarizations are complementary in these two kinds of waveguides. By calculating the relationship of Si nanowire waveguides and slot waveguides' length differences, optimizing the structure of slot waveguides and choosing the appropriate diffraction order, central channel wavelength and channel spacing can both reduce the polarization sensitivity greatly. The design process is given in detail and the simulation results demonstrate that the AWG demultiplexer can meet polarization insensitive demand.
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Lei Zhao, Lei Zhao, Junming An, Junming An, Jiashun Zhang, Jiashun Zhang, Shijiao Song, Shijiao Song, Yuanda Wu, Yuanda Wu, Xiongwei Hu, Xiongwei Hu, } "Theoretical analysis of a novel polarization-insensitive AWG demultiplexer based on Si nanowire and slot waveguides", Proc. SPIE 7847, Optoelectronic Devices and Integration III, 78472A (17 November 2010); doi: 10.1117/12.869868; https://doi.org/10.1117/12.869868
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