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 language | English |
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Pages (from-to) | 30340-30348 |
Number of pages | 9 |
Journal | Optics Express |
Volume | 28 |
Issue number | 21 |
DOIs | |
Publication status | Published - 12 Oct 2020 |