Modulational instability and generation of pulse trains in asymmetric dual-core nonlinear optical fibers

Ganapathy, R. ; Malomed, Boris A. ; Porseziana, K. (2006) Modulational instability and generation of pulse trains in asymmetric dual-core nonlinear optical fibers Physics Letters A, 354 (5-6). pp. 366-372. ISSN 0375-9601

Full text not available from this repository.

Official URL: http://www.sciencedirect.com/science/article/pii/S...

Related URL: http://dx.doi.org/10.1016/j.physleta.2006.02.002

Abstract

Instability of continuous-wave (CW) states is investigated in a system of two parallel-coupled fibers, with a pumped (active) nonlinear dispersive core and a lossy (passive) linear one. Modulational instability (MI) conditions are found from linearized equations for small perturbations, the results being drastically different for the normal and anomalous group-velocity dispersion (GVD) in the active core. Simulations of the full system demonstrate that the development of the MI in the former regime leads to establishment of a regular or chaotic array of pulses, if the MI saturates, or a chain of well-separated peaks with continuously growing amplitudes if the instability does not saturate. In the anomalous-GVD regime, a chain of return-to-zero (RZ) peaks, or a single RZ peak emerge, also with growing amplitudes. The latter can be used as a source of RZ pulses for optical telecommunications.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Complex Ginzburg-landau Equation; Dual-core Fiber; Modulational Instability; Soliton; Group-velocity Dispersion
ID Code:83954
Deposited On:23 Feb 2012 12:43
Last Modified:23 Feb 2012 12:43

Repository Staff Only: item control page