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

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 نشر من قبل Sergey Suchkov Dr.
 تاريخ النشر 2020
  مجال البحث فيزياء
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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.



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