Induced coherence and stable soliton spiraling

We develop a theory of soliton spiraling in a bulk nonlinear medium and rev eal a new physical mechanism: Periodic power exchange via induced coherence , which can lead to stable spiraling and the formation of dynamical two-sol iton states. Our theory explains earlier observations and provides a number of predictions which are verified experimentally. Finally, we show theoret ically and experimentally that soliton spiraling can be controlled by the d egree of mutual initial coherence. [S0031-9007(98)08048-X].