  A double-layer Kerr resonator in which both coupled modes are excited and
interact with each other via incoherent cross-phase modulation is investigated
to reveal stable localized solutions beyond the usual formation mechanism
involving a single mode. Periodic solutions from modulational instability are
found to occur at a slight penalty on the nonlinear efficiency, but they
stabilize the spatial dynamics, leading to dissipative solitons in previously
unattainable regimes. Numerical simulations show paired breather solitons in
addition to temporally stable solutions. The results demonstrate coupled modes
can increase the stability of Kerr frequency comb generation.

Optics