Flexible and low cost wavelength management for optical networking
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United States of America Patent
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app pub date -
Jul 1, 2002
filing date -
Feb 13, 2001
priority date (Note) -
Abandoned
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Abstract
A method and devices for individually controlling the signal strength of single or multiple optical channels. A controller module monitors the signal strength of channels and amplifies those that need amplifying while attenuating those that are too strong using the same Erbium doped fiber amplifier. A controllable compensation module receives at least one channel and, when required, can either amplify or attenuate the signal strength of the channels. The module can be constructed out of a single fiber with an associated pump laser. If the laser provides insufficient pumping power, the fiber acts as an attenuator. If the laser provides a higher level of pump power, the fiber acts as an amplifier.
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