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Broadband Compact Silicon Wire to Silicon Slot Waveguide Orthogonal Bend

An ultra-compact 90° bend between silicon (Si) wire and silicon slot waveguide (SSW) with a footprint of ~725 nm × 500 nm is experimentally demonstrated on silicon-on-insulator substrate. By achieving momentum matching of the waveguides through an orthogonal junction placement, and maximizing modal...

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Published in:Journal of lightwave technology 2014-04, Vol.32 (7), p.1399-1405
Main Authors: Wong, Herman M. K., Lin, Charles, Swillam, Mohamed A., Helmy, Amr S.
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Language:English
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container_issue 7
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creator Wong, Herman M. K.
Lin, Charles
Swillam, Mohamed A.
Helmy, Amr S.
description An ultra-compact 90° bend between silicon (Si) wire and silicon slot waveguide (SSW) with a footprint of ~725 nm × 500 nm is experimentally demonstrated on silicon-on-insulator substrate. By achieving momentum matching of the waveguides through an orthogonal junction placement, and maximizing modal overlap through an angled facet, coupling efficiency of ~70% and 3-dB bandwidth of over 500 nm has been achieved. The nominal experimental transmission through cascaded input (Si wire to SSW) and output (SSW to Si wire) orthogonal junctions match closely those obtained from simulations, both in the range from 1270 to 1360 nm and from 1480 to 1590 nm. For slot widths ranging from 30 to 230 nm, our Si wire-SSW bend can achieve coupling efficiency comparable to that of a direct butt-coupler over a 400 nm bandwidth. This compact and wideband waveguide bend serves as an important component to enable dense integration between conventional Si wire and SSW.
doi_str_mv 10.1109/JLT.2014.2305661
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source IEEE Xplore (Online service)
subjects Applied sciences
Circuit properties
Couplers
Couplings
Electric, optical and optoelectronic circuits
Electronics
Exact sciences and technology
Integrated optics
Integrated optics. Optical fibers and wave guides
Junctions
Optical and optoelectronic circuits
Optical waveguides
Propagation losses
Services and terminals of telecommunications
Silicon
silicon photonics
slot waveguide
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Telemetry. Remote supervision. Telewarning. Remote control
Wires
title Broadband Compact Silicon Wire to Silicon Slot Waveguide Orthogonal Bend
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