Stability of Binary Solitons in Optical Fibers with Cubic-Quintic Cross-Phase Modulation

S. Dasa, b, G.A. Sekha aDepartment of Physics, Kazi Nazrul University, Asansol-713340, India bDepartment of Physics, Government General Degree College, Chapra Shikra, Nadia-741123, India

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We consider the propagation of nonlinear coupled pulses in an optical fiber with cubic-quintic self-and cross-phase modulation. We model the system by extended Manakov equations incorporating higher-order cross-coupling terms. We find that the pulse gets a certain minimum width for stable propagation in the medium. However, the pulse width reduces in the presence of higher-order cross-coupling terms. We make use of the Vakhitov-Kolokolov criterion and examine whether the pulse is linearly stable for different values of the pulse power. We also simulate the dynamics of a coupled soliton by a purely numerical routine.

DOI:10.12693/APhysPolA.142.450 topics: optical solitons, manakov model, variational approach, Vakhitov-Kolokolov criterion