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    Wide-field-of-view optical detectors based on fused fiber-optic tapers for high-speed optical wireless communication

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    Name:
    FFOT in OWC - Photonics Europe 2022 (Accepted).pdf
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    Description:
    Accepted Manuscript
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    Type
    Conference Paper
    Presentation
    Authors
    Ooi, Boon S. cc
    Alkhazragi, Omar cc
    Trichili, Abderrahmen cc
    KAUST Department
    Computer, Electrical and Mathematical Science and Engineering (CEMSE) Division
    Computer, Electrical, and Mathematical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), 23955-6900 Thuwal, Saudi Arabia
    Electrical and Computer Engineering
    Electrical and Computer Engineering Program
    Photonics Laboratory
    Date
    2022-05-24
    Permanent link to this record
    http://hdl.handle.net/10754/678596
    
    Metadata
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    Abstract
    Optical wireless communication (OWC) is envisioned to become an indispensable technology in future wireless networks. However, one of the main issues hindering the widespread of OWC systems is the strict alignment required to maintain connectivity. This is due to the tradeoff between the receiver’s active area and its response speed, which necessitates the use of a lens to focus the light, limiting the field of view (FOV). Taking inspiration from the wide-FOV eyes of horseflies to address this issue, we propose the use of a convex-surface fused fiber-optic taper (FFOT) that can effectively expand a planar array of photodetectors and project it onto a spherical dome, respectively improving the light collection of individual photodetectors and expanding the overall FOV of the array. In our proof-of-concept demonstration, we show an optical receiver with a FOV semi-angle of around 25° and optical power density gain up to 120 in a 1-GHz link whose bandwidth is limited only by the photodetector. Moreover, reducing of the FOV of each individual fiber that results from tapering and the extra-mural absorption material incorporated around the fibers’ cores reduce the crosstalk between them, preserving the image quality. Therefore, unlike non-imaging light focusing elements, FFOTs can potentially be used in applications in which preserving the image is necessary, such as in imaging multiple-input and multiple-output systems and light detection and ranging (LiDAR). We also show the performance of FFOTs in collecting light from color-converting materials, a technique used in expanding the FOV beyond the étendue limit.
    Citation
    Ooi, B. S., Alkhazragi, O., & Trichili, A. (2022). Wide-field-of-view optical detectors based on fused fiber-optic tapers for high-speed optical wireless communication. Mesophotonics: Physics and Systems at Mesoscale. https://doi.org/10.1117/12.2622389
    Publisher
    SPIE
    Conference/Event name
    SPIE Photonics Europe
    DOI
    10.1117/12.2622389
    Additional Links
    https://www.spiedigitallibrary.org/conference-proceedings-of-spie/12152/2622389/Wide-field-of-view-optical-detectors-based-on-fused-fiber/10.1117/12.2622389.full
    ae974a485f413a2113503eed53cd6c53
    10.1117/12.2622389
    Scopus Count
    Collections
    Conference Papers; Electrical and Computer Engineering Program; Photonics Laboratory; Computer, Electrical and Mathematical Science and Engineering (CEMSE) Division

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