Line amplification system for wavelength switched optical networks
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United States of America Patent
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Issued Date -
May 27, 2004
app pub date -
Jul 3, 2003
filing date -
Jun 7, 2001
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A line amplification system connected on the fiber between two flexibility sites of a wavelength switched network is built with a number of modules that can be arranged in a line amplifier, preamplifier and postamplifier configurations. The line and preamplifiers include a Raman module and a two-stage EDFA module provided with mid-stage access. A dynamic gain equalizer is connected in the mid-stage in the line amplification configurations. As well, dispersion compensating module may be connected in the mid-stage whenever/if needed. A line monitoring and control system operates the line amplification system so that all channels traveling along a link have substantially the same power, in the context of channels being added and removed to/from the line arbitrarily.
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