Propagation of an optical pulse in a fiber link with random-dispersion management

Malomed, BA Berntson, A

Ba. Malomed et A. Berntson, Propagation of an optical pulse in a fiber link with random-dispersion management, J OPT SOC B, 18(9), 2001, pp. 1243-1251

40

INGLESE

Article

Apllied Physucs/Condensed Matter/Materiales Science","Optics & Acoustics

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS

0740-3224 → ACNP

18

9

2001

1243 - 1251

ISI

0740-3224(200109)18:9<1243:POAOPI>2.0.ZU;2-8

A model of a long optical communication line consisting of alternating segm ents with anomalous and normal dispersion, whose lengths are picked randoml y from a certain interval, is considered. As the first stage of the analysi s, we calculate small changes in parameters of a quasi-Gaussian pulse passi ng a double-segment cell by means of the variational approximation (VA) and we approximate the evolution of the pulse passing many cells by smoothed o rdinary differential equations with random coefficients, which are solved n umerically. Next we perform systematic direct simulations of the model. Sim ulations reveal slow long-scale dynamics of the pulse, frequently in the fo rm of long-period oscillations of its width. It is thus found that the soli ton is most stable in the case of zero path-average dispersion (PAD), less stable in the case of anomalous PAD, and least stable in the case of normal PAD. The soliton's stability also strongly depends on its energy, the soli ton with low energy being much more robust than its high energy counterpart . (C) 2001 Optical Society of America.