Multiplexed single-mode wavelength-to-time mapping of multimode light

Harikumar K Chandrasekharan, Frauke Izdebski, Itandehui Gris-Sánchez, Nikola Krstajić, Richard Walker, Helen L Bridle, Paul A Dalgarno, William N MacPherson, Robert K. Henderson, Tim A Birks, Robert R Thomson

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    Abstract

    When an optical pulse propagates along an optical fibre, different wavelengths travel at different group velocities. As a result, wavelength information is converted into arrival-time information, a process known as wavelength-to-time mapping. This phenomenon is most cleanly observed using a single-mode fibre transmission line, where spatial mode dispersion is not present, but the use of such fibres restricts possible applications. Here we demonstrate that photonic lanterns based on tapered single-mode multicore fibres provide an efficient way to couple multimode light to an array of single-photon avalanche detectors, each of which has its own time-to-digital converter for time-correlated single-photon counting. Exploiting this capability, we demonstrate the multiplexed single-mode wavelength-to-time mapping of multimode light using a multicore fibre photonic lantern with 121 single-mode cores, coupled to 121 detectors on a 32 × 32 detector array. This work paves the way to efficient multimode wavelength-to-time mapping systems with the spectral performance of single-mode systems.

    Original languageEnglish
    Pages (from-to)14080
    JournalNature Communications
    Volume8
    DOIs
    Publication statusPublished - 25 Jan 2017

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    Keywords

    • Electrical and electronic engineering
    • Fibre optics and optical communications
    • Optical techniques

    Cite this

    Chandrasekharan, H. K., Izdebski, F., Gris-Sánchez, I., Krstajić, N., Walker, R., Bridle, H. L., Dalgarno, P. A., MacPherson, W. N., Henderson, R. K., Birks, T. A., & Thomson, R. R. (2017). Multiplexed single-mode wavelength-to-time mapping of multimode light. Nature Communications, 8, 14080. https://doi.org/10.1038/ncomms14080