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 and Robert R. Thomson ()
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Harikumar K Chandrasekharan: Scottish Universities Physics Alliance (SUPA), Institute of Photonics and Quantum Sciences, School of Engineering and Physical Sciences, Heriot-Watt University
Frauke Izdebski: Scottish Universities Physics Alliance (SUPA), Institute of Photonics and Quantum Sciences, School of Engineering and Physical Sciences, Heriot-Watt University
Itandehui Gris-Sánchez: University of Bath, Claverton Down
Nikola Krstajić: Institute for Integrated Micro and Nano Systems, School of Engineering, University of Edinburgh
Richard Walker: Institute for Integrated Micro and Nano Systems, School of Engineering, University of Edinburgh
Helen L. Bridle: Institute of Biological Chemistry, Biophysics and Bioengineering, School of Engineering and Physical Sciences, Heriot-Watt University
Paul A. Dalgarno: Institute of Biological Chemistry, Biophysics and Bioengineering, School of Engineering and Physical Sciences, Heriot-Watt University
William N. MacPherson: Scottish Universities Physics Alliance (SUPA), Institute of Photonics and Quantum Sciences, School of Engineering and Physical Sciences, Heriot-Watt University
Robert K. Henderson: Institute for Integrated Micro and Nano Systems, School of Engineering, University of Edinburgh
Tim A. Birks: University of Bath, Claverton Down
Robert R. Thomson: Scottish Universities Physics Alliance (SUPA), Institute of Photonics and Quantum Sciences, School of Engineering and Physical Sciences, Heriot-Watt University

Nature Communications, 2017, vol. 8, issue 1, 1-10

Abstract: 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.

Date: 2017
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DOI: 10.1038/ncomms14080

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