Home // CENICS 2011, The Fourth International Conference on Advances in Circuits, Electronics and Micro-electronics // View article
Authors:
Paloma R. Horche
Carmina del rio Campos
Alfredo Martin Minguez
Keywords: directly modulated laser; adiabatic and transient chirp; linewidth enhancement factor; adiabatic coefficient; fiber chromatic dispersion
Abstract:
In this paper, we have analyzed the interaction of semiconductor laser chirp with the fiber chromatic dispersion characteristics in order to study the impact on a Wavelength Division Multiplexing (WDM) directly modulated system performance. Also, we have demonstrated that the system transmission performance depends, strongly, on the Directly Modulated Laser (DML) output power and its adiabatic and transient chirp parameters. We have calculated by simulation, that the effect of DMLs chirp can be compensated by a negative dispersion fiber in a specific range of the DML output power. In addition, a pulse broadened by the positive dispersion fiber can be equalized using self-phase-modulation (SPM) in the optical fiber. The majority of metro and access networks are made up of conventional single-mode fibers (SMF) which are positive dispersion fibers. We have demonstrated that the optimum compensation is always feasible for such fibers by changing the optical output power in the DML laser. Furthermore, simulations suggest that this technique is able to enhance the performance of directly modulated wavelength division multiplexed systems if the power of each channel is chosen correctly.
Pages: 17 to 22
Copyright: Copyright (c) IARIA, 2011
Publication date: August 21, 2011
Published in: conference
ISSN: 2308-426X
ISBN: 978-1-61208-150-2
Location: Nice/Saint Laurent du Var, France
Dates: from August 21, 2011 to August 27, 2011