# Monomode fiber isn't monomode after all

 Authors: Journal: B Perny, C Zimmer, N Gisin ComTec ComTec vol.75, no.5, 46–9, (1997) Recent statistics show that the transmission rate requirements in modern transmission systems roughly quadruples about every five years. Fiber systems of 2.5 Gbit/s (STM-16) have been standard already for some time. Systems for 10 Gbit/s (STM-64) are awaiting production, and data rates above 10 Gbit/s are expected soon. By its nature, the fiber itself is generally considered as a transmission medium with unlimited capacity. That this is not necessarily the case has been revealed recently in practice by several network operators. Due to excessive polarization mode dispersion, problems can occur with 2.5-Gbit/s systems. Detrimental effects have also appeared using analog CATV transmission, where pictures may be degraded by fiber transmission. Often the main problem seems to consist of insufficient specification of the fiber. The possibility of a future upgrade of existing cable networks to bit rates of 10 Gbit/s or even higher will thus depend on the corresponding quality of the installed cables; therefore, when selecting new fiber and cable installations, an appropriate specification is very important, considering the fact that newly installed cables represent an asset for typically the next 20 years {{}}

# BibTeX Source

@Article{Perny1997,
author =       "B. Perny and C. Zimmer and N. Gisin",
title =        "Monomode fiber isn't monomode after all",
journal =      "ComTec|ComTec",
year =         "1997",
volume =       "vol.75, no.5",
pages =        "46--9,",
abstract =     "Recent statistics show that the transmission rate requirements in modern
2.5 Gbit/s (STM-16) have been standard already for some time. Systems for 10 Gbit/s
(STM-64) are awaiting production, and data rates above 10 Gbit/s are expected soon.
By its nature, the fiber itself is generally considered as a transmission medium
with unlimited capacity. That this is not necessarily the case has been revealed
recently in practice by several network operators. Due to excessive polarization
mode dispersion, problems can occur with 2.5-Gbit/s systems. Detrimental effects
have also appeared using analog CATV transmission, where pictures may be degraded
by fiber transmission. Often the main problem seems to consist of insufficient
specification of the fiber. The possibility of a future upgrade of existing cable
networks to bit rates of 10 Gbit/s or even higher will thus depend on the
corresponding quality of the installed cables; therefore, when selecting new fiber
and cable installations, an appropriate specification is very important,
considering the fact that newly installed cables represent an asset for typically
the next 20 years",
owner =        "cc",
sn =           "1420-3715",
timestamp =    "2010.08.20",
ut =           "INSPEC:5646031",
}