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Spatial tomography of light resolved in time, spectrum, and polarisation

Author

Listed:
  • Martin Plöschner

    (School of Information Technology and Electrical Engineering, The University of Queensland)

  • Marcos Maestre Morote

    (School of Information Technology and Electrical Engineering, The University of Queensland)

  • Daniel Stephen Dahl

    (School of Information Technology and Electrical Engineering, The University of Queensland)

  • Mickael Mounaix

    (School of Information Technology and Electrical Engineering, The University of Queensland)

  • Greta Light

    (II-VI Incorporated)

  • Aleksandar D. Rakić

    (School of Information Technology and Electrical Engineering, The University of Queensland)

  • Joel Carpenter

    (School of Information Technology and Electrical Engineering, The University of Queensland)

Abstract

Measuring polarisation, spectrum, temporal dynamics, and spatial complex amplitude of optical beams is essential to studying phenomena in laser dynamics, telecommunications and nonlinear optics. Current characterisation techniques apply in limited contexts. Non-interferometric methods struggle to distinguish spatial phase, while phase-sensitive approaches necessitate either an auxiliary reference source or a self-reference, neither of which is universally available. Deciphering complex wavefronts of multiple co-propagating incoherent fields remains particularly challenging. We harness principles of spatial state tomography to circumvent these limitations and measure a complete description of an unknown beam as a set of spectrally, temporally, and polarisation resolved spatial state density matrices. Each density matrix slice resolves the spatial complex amplitude of multiple mutually incoherent fields, which over several slices reveals the spectral or temporal evolution of these fields even when fields spectrally or temporally overlap. We demonstrate these features by characterising the spatiotemporal and spatiospectral output of a vertical-cavity surface-emitting laser.

Suggested Citation

  • Martin Plöschner & Marcos Maestre Morote & Daniel Stephen Dahl & Mickael Mounaix & Greta Light & Aleksandar D. Rakić & Joel Carpenter, 2022. "Spatial tomography of light resolved in time, spectrum, and polarisation," Nature Communications, Nature, vol. 13(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-31814-2
    DOI: 10.1038/s41467-022-31814-2
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    References listed on IDEAS

    as
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