Abstract

The limitation on information flux in soliton-based optical-fiber communication that is due to stimulated Brillouin scattering (SBS) is analyzed by means of the space–time three-wave resonant model for SBS. We show that a continuous train of well-separated solitons excites SBS above a bit-rate threshold fbitthd and that SBS degrades the information after some critical transmission length Lc. General simple formulas give fbitthd, the SBS gain, and Lc as functions of the fiber characteristics. A large range of threshold values is obtained, depending principally on the soliton phase distribution and on the fiber dispersion. For trains of solitons in phase, fbitthd is ∼0.7 Gbit/s for normally dispersive (n.d.) fibers and ∼3.3 Gbits/s for dispersion-shifted (d.-s.) fibers, whereas for trains of solitons uncorrelated in phase the bit-rate threshold goes from ∼21 Gbits/s for n.d. fibers to ∼440 Gbits/s for d.-s. fibers.

© 1992 Optical Society of America

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