4-by-4 integrated waveguide coupler based on bi-directional propagation in two single-mode waveguides
4-by-4 integrated waveguide coupler based on bi-directional propagation in two single-mode waveguides
We propose and investigate theoretically the use of bi-directional propagation of light in silica integrated coupled waveguide structures for linear optical processing of fiber-coupled photons. We show that the class of linear operations that can be implemented in such a system is given by symmetric and unitary matrices. We present how an arbitrary 4 × 4 coupler of this form can be realized by a linear sequence of more fundamental 2 × 2 couplers and single-waveguide phase shifters and discuss in detail the implementation in a silica integrated platform utilizing direct UV-written waveguides and long- and short-period grating couplers with tilted gratings for optimized coupling efficiency.
Bragg gratings, Couplings, Gratings, Optical coupling, Optical waveguides, Silicon compounds, Transmission line matrix methods, quantum processing
Weisen, Mathias John
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Gates, James C.
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Gawith, Corin
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Smith, Peter G.R.
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Horak, Peter
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Weisen, Mathias John
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Gates, James C.
b71e31a1-8caa-477e-8556-b64f6cae0dc2
Gawith, Corin
926665c0-84c7-4a1d-ae19-ee6d7d14c43e
Smith, Peter G.R.
8979668a-8b7a-4838-9a74-1a7cfc6665f6
Horak, Peter
520489b5-ccc7-4d29-bb30-c1e36436ea03
Weisen, Mathias John, Gates, James C., Gawith, Corin, Smith, Peter G.R. and Horak, Peter
(2020)
4-by-4 integrated waveguide coupler based on bi-directional propagation in two single-mode waveguides.
IEEE Photonics Journal.
(doi:10.1109/JPHOT.2020.3040073).
Abstract
We propose and investigate theoretically the use of bi-directional propagation of light in silica integrated coupled waveguide structures for linear optical processing of fiber-coupled photons. We show that the class of linear operations that can be implemented in such a system is given by symmetric and unitary matrices. We present how an arbitrary 4 × 4 coupler of this form can be realized by a linear sequence of more fundamental 2 × 2 couplers and single-waveguide phase shifters and discuss in detail the implementation in a silica integrated platform utilizing direct UV-written waveguides and long- and short-period grating couplers with tilted gratings for optimized coupling efficiency.
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Bidirectional_coupler
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Accepted/In Press date: 9 November 2020
e-pub ahead of print date: 24 November 2020
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Publisher Copyright:
CCBY
Keywords:
Bragg gratings, Couplings, Gratings, Optical coupling, Optical waveguides, Silicon compounds, Transmission line matrix methods, quantum processing
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Local EPrints ID: 445555
URI: http://eprints.soton.ac.uk/id/eprint/445555
ISSN: 1943-0655
PURE UUID: 8d588bfb-9843-417a-b318-1a3716cb1431
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Date deposited: 16 Dec 2020 17:31
Last modified: 17 Mar 2024 02:55
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Author:
Mathias John Weisen
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