Nonlinear transition between PT-symmetric and PT-broken modes in coupled fiber lasers

Sergey V. Suchkov*, Dmitry V. Churkin, Andrey A. Sukhorukov

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    5 Citations (Scopus)

    Abstract

    We present a systematic analysis of the stationary regimes of nonlinear parity-time (PT) symmetric laser composed of two coupled fiber cavities. We find that power-dependent nonlinear phase shifters broaden regions of existence of both PT-symmetric and PT-broken modes, and can facilitate transitions between modes of different types. We show the existence of non-stationary regimes and demonstrate an ambiguity of the transition process for some of the unstable states. We also identify the presence of higher-order stationary modes, which return to the initial state periodically after a certain number of round-trips.

    Original languageEnglish
    Pages (from-to)30340-30348
    Number of pages9
    JournalOptics Express
    Volume28
    Issue number21
    DOIs
    Publication statusPublished - 12 Oct 2020

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