Nonlinear pulse propagation in twin-core-fiber rocking filters

摘要

Nonlinear pulse propagation is investigated in a twin-core, birefringent rocking filter, a structure for which the linear properties indicate the presence of two stop gaps. It is found that in two special cases, the four nonlinear, coupled-mode equations that describe the system can be reduced to a pair of equations that have been well studied. Consequently, two kinds of compound solitary waves are obtained, which are generalizations of previous results: one that propagates down the structure with equal power in each core and a solution that periodically couples completely from core to core without degradation.