We propose a parity-time(PT) symmetric fiber laser composed of two coupled ring cavities with gains and losses,which operates both in PT-symmetric and symmetry-broken regimes depending on the static phase shifts. We p...We propose a parity-time(PT) symmetric fiber laser composed of two coupled ring cavities with gains and losses,which operates both in PT-symmetric and symmetry-broken regimes depending on the static phase shifts. We perform analytical and numerical analysis by the transfer matrix method taking into account gain saturation and predict laser bistability in the PT-symmetric regime in contrast to a symmetry-broken single-mode operation.In the PT-broken regime, the generation power counterintuitively increases with an increase of the cavity losses.展开更多
基金Russian Science Foundation(RSF)(16-12-10402)Australian Research Council(ARC)(DP160100619)
文摘We propose a parity-time(PT) symmetric fiber laser composed of two coupled ring cavities with gains and losses,which operates both in PT-symmetric and symmetry-broken regimes depending on the static phase shifts. We perform analytical and numerical analysis by the transfer matrix method taking into account gain saturation and predict laser bistability in the PT-symmetric regime in contrast to a symmetry-broken single-mode operation.In the PT-broken regime, the generation power counterintuitively increases with an increase of the cavity losses.
