TY - JOUR

T1 - Nonlinear transition between PT-symmetric and PT-broken modes in coupled fiber lasers

AU - Suchkov, Sergey V.

AU - Churkin, Dmitry V.

AU - Sukhorukov, Andrey A.

PY - 2020/10/12

Y1 - 2020/10/12

N2 - 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.

AB - 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.

KW - EMISSION

UR - http://www.scopus.com/inward/record.url?scp=85093984783&partnerID=8YFLogxK

U2 - 10.1364/OE.397853

DO - 10.1364/OE.397853

M3 - Article

C2 - 33115038

AN - SCOPUS:85093984783

VL - 28

SP - 30340

EP - 30348

JO - Optics Express

JF - Optics Express

SN - 1094-4087

IS - 21

ER -