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Proceedings Paper

Impact of fiber nonlinearity on the fiber transfer function of intensity modulation transmission systems
Author(s): Adolfo V. T. Cartaxo; Jose A. P. Morgado
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Paper Abstract

Measurements techniques relying on the intensity modulation (IM) fiber transfer function have recently been presented for estimating the fiber dispersion coefficient as well as the transient and adiabatic laser chirp. A theory which quantifies accurately the interaction of fiber nonlinearity and dispersion and their effects on the fiber transfer function is highly desirable to design properly long-haul gigabit-per- second transmission systems. In this paper, we investigate theoretically and numerically the influence of fiber nonlinearity on the IM fiber transfer function. A new small- signal theory for the optical fiber considering the fiber nonlinearity, dispersion and loss is presented. From this, the fiber transfer function with either an external modulator or a directly modulated singlemode laser as optical transmitter, has been computed for various optical powers. All theoretical predictions have been compared with simulation results and excellent agreement has been achieved. The results reveal that, in comparison with linear transmission, the fiber transfer function is enhanced by several dB in case of propagation in the anomalous dispersion regime and is reduced in the normal dispersion regime, even for moderate optical power at fiber input (approximately equals 20 mW). This means an increase of bandwidth in the anomalous regime and a decrease in the normal regime.

Paper Details

Date Published: 10 October 1997
PDF: 12 pages
Proc. SPIE 3230, All-Optical Communication Systems: Architecture, Control, and Network Issues III, (10 October 1997); doi: 10.1117/12.290395
Show Author Affiliations
Adolfo V. T. Cartaxo, Instituto Superior Tecnico (Portugal)
Jose A. P. Morgado, Instituto Superior Tecnico (Portugal)

Published in SPIE Proceedings Vol. 3230:
All-Optical Communication Systems: Architecture, Control, and Network Issues III
John M. Senior; Robert A. Cryan; Chunming Qiao, Editor(s)

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