Integrable nonlinear parity-time symmetric optical oscillator

摘要

The nonlinear dynamics of a balanced parity-time symmetric optical microringarrangement are analytically investigated. By considering gain and losssaturation effects, the pertinent conservation laws are explicitly obtained inthe Stokes domain-thus establishing integrability. Our analysis indicates theexistence of two regimes of oscillatory dynamics and frequency locking, both ofwhich are analogous to those expected in linear parity-time symmetric systems.Unlike other saturable parity time symmetric systems considered before, themodel studied in this work first operates in the symmetric regime and thenenters the broken parity-time phase.