Partition of the instantaneous and delayed nonlinear responses for the propagation of ultrashort solitons in optical fibers

Olivier Vanvincq (1) , A. Bendahmane (1) , Arnaud Mussot (1) , Alexandre Kudlinski (1)

1 PhLAM - Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523

We address the long-standing issue of accurately partitioning the nonlinear response of silica glass into electronic (Kerr) and nuclear (Raman) contributions to correctly describe the propagation of ultrashort solitons in a unified way independently of their duration. This is done with a semianalytical approach leading to a modified nonlinear coefficient and thus to a modified condition for fundamental soliton propagation valid for durations much less, in the same order, or much greater than the characteristic time scale of the Raman response function. The results provided by this model are in good agreement with numerical integration of the nonlinear Schrödinger equation taking the Raman response into account.

Domaines: Optique [physics.optics]

Olivier Vanvincq, A. Bendahmane, Arnaud Mussot, Alexandre Kudlinski. Partition of the instantaneous and delayed nonlinear responses for the propagation of ultrashort solitons in optical fibers. Physical Review A : Atomic, molecular, and optical physics [1990-2015], 2012, 85, pp.033838. ⟨10.1103/PhysRevA.85.033838⟩. ⟨hal-00879756⟩