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Spectral correlations in a random distributed feedback fibre laser

Author

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  • Srikanth Sugavanam

    (Aston Institute of Photonic Technologies, Aston University, Aston Triangle)

  • Mariia Sorokina

    (Aston Institute of Photonic Technologies, Aston University, Aston Triangle)

  • Dmitry V. Churkin

    (Novosibirsk State University)

Abstract

Random distributed feedback fibre lasers belong to the class of random lasers, where the feedback is provided by amplified Rayleigh scattering on sub-micron refractive index inhomogenities randomly distributed over the fibre length. Despite the elastic nature of Rayleigh scattering, the feedback mechanism has been insofar deemed incoherent, which corresponds to the commonly observed smooth generation spectra. Here, using a real-time spectral measurement technique based on a scanning Fabry-Pérot interferometer, we observe long-living narrowband components in the random fibre laser’s spectrum. Statistical analysis of the ∼104 single-scan spectra reveals a preferential interspacing for the components and their anticorrelation in intensities. Furthermore, using mutual information analysis, we confirm the existence of nonlinear correlations between different parts of the random fibre laser spectra. The existence of such narrowband spectral components, together with their observed correlations, establishes a long-missing parallel between the fields of random fibre lasers and conventional random lasers.

Suggested Citation

  • Srikanth Sugavanam & Mariia Sorokina & Dmitry V. Churkin, 2017. "Spectral correlations in a random distributed feedback fibre laser," Nature Communications, Nature, vol. 8(1), pages 1-8, August.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_ncomms15514
    DOI: 10.1038/ncomms15514
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    Cited by:

    1. Pedro Tovar & Jean Pierre von der Weid & Yuan Wang & Liang Chen & Xiaoyi Bao, 2023. "A random optical parametric oscillator," Nature Communications, Nature, vol. 14(1), pages 1-9, December.

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