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...
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| Format: | Article |
| Language: | English |
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IEEE
2021-01-01
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| Series: | IEEE Photonics Journal |
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| Online Access: | https://ieeexplore.ieee.org/document/9268075/ |
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| author | Mathias J. Weisen James C. Gates Corin B. E. Gawith Peter G. R. Smith Peter Horak |
| author_facet | Mathias J. Weisen James C. Gates Corin B. E. Gawith Peter G. R. Smith Peter Horak |
| author_sort | Mathias J. Weisen |
| collection | DOAJ |
| description | 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 <inline-formula><tex-math notation="LaTeX">$4\times 4$</tex-math></inline-formula> coupler of this form can be realized by a linear sequence of more fundamental <inline-formula><tex-math notation="LaTeX">$2\times 2$</tex-math></inline-formula> 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. |
| format | Article |
| id | doaj-art-6a1bc5f0416d45219fdd8449a9ca13e5 |
| institution | DOAJ |
| issn | 1943-0655 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj-art-6a1bc5f0416d45219fdd8449a9ca13e52025-08-20T03:15:50ZengIEEEIEEE Photonics Journal1943-06552021-01-0113111410.1109/JPHOT.2020.304007392680754-by-4 Integrated Waveguide Coupler Based on Bi-Directional Propagation in Two Single-Mode WaveguidesMathias J. Weisen0https://orcid.org/0000-0003-0387-972XJames C. Gates1https://orcid.org/0000-0001-8671-5987Corin B. E. Gawith2https://orcid.org/0000-0002-3502-3558Peter G. R. Smith3Peter Horak4https://orcid.org/0000-0002-8710-8764Optoelectronics Research Centre, University of Southampton, Southampton, SO17, UKOptoelectronics Research Centre, University of Southampton, Southampton, SO17, UKOptoelectronics Research Centre, University of Southampton, Southampton, SO17, UKOptoelectronics Research Centre, University of Southampton, Southampton, SO17, UKOptoelectronics Research Centre, University of Southampton, Southampton, SO17, UKWe 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 <inline-formula><tex-math notation="LaTeX">$4\times 4$</tex-math></inline-formula> coupler of this form can be realized by a linear sequence of more fundamental <inline-formula><tex-math notation="LaTeX">$2\times 2$</tex-math></inline-formula> 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.https://ieeexplore.ieee.org/document/9268075/Bragg gratingsoptical waveguidesquantum processing |
| spellingShingle | Mathias J. Weisen James C. Gates Corin B. E. Gawith Peter G. R. Smith Peter Horak 4-by-4 Integrated Waveguide Coupler Based on Bi-Directional Propagation in Two Single-Mode Waveguides IEEE Photonics Journal Bragg gratings optical waveguides quantum processing |
| title | 4-by-4 Integrated Waveguide Coupler Based on Bi-Directional Propagation in Two Single-Mode Waveguides |
| title_full | 4-by-4 Integrated Waveguide Coupler Based on Bi-Directional Propagation in Two Single-Mode Waveguides |
| title_fullStr | 4-by-4 Integrated Waveguide Coupler Based on Bi-Directional Propagation in Two Single-Mode Waveguides |
| title_full_unstemmed | 4-by-4 Integrated Waveguide Coupler Based on Bi-Directional Propagation in Two Single-Mode Waveguides |
| title_short | 4-by-4 Integrated Waveguide Coupler Based on Bi-Directional Propagation in Two Single-Mode Waveguides |
| title_sort | 4 by 4 integrated waveguide coupler based on bi directional propagation in two single mode waveguides |
| topic | Bragg gratings optical waveguides quantum processing |
| url | https://ieeexplore.ieee.org/document/9268075/ |
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