Observation of prolonged power transients in a reconfigurable multiwavelength network and their suppression by gain-clamping of optical amplifiers

We observe channel power transients lasting several seconds in a reconfigurable multiwavelength network, which includes cascaded automatic channel power equalizers and fiber amplifiers in 1018- and 1898-km fiber links. Such prolonged power transients occur upon reconfiguration of the network due to...

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Bibliographic Details
Published in:IEEE photonics technology letters 1998-11, Vol.10 (11), p.1659-1661
Main Authors: Yoo, S.J.B., Wei Xin, Garratt, L.D., Young, J.C., Ellinas, G., Chiao, J.C., Rauch, M., Baran, J.E., Meagher, B., Leblanc, H., Gee-Kung Chang
Format: Article
Language:English
Subjects:
All-optical networks
Equalizers
Feedback loop
Intelligent networks
Optical amplifiers
Optical feedback
Optical fiber amplifiers
Optical fiber networks
Power amplifiers
Stimulated emission
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Summary:We observe channel power transients lasting several seconds in a reconfigurable multiwavelength network, which includes cascaded automatic channel power equalizers and fiber amplifiers in 1018- and 1898-km fiber links. Such prolonged power transients occur upon reconfiguration of the network due to coupling between the feedback control loops of the channel power equalizers and their interaction with the delay through the fiber link. Experiments performed under numerous conditions support this hypothesis. In particular, we experimentally demonstrate that gain-clamping of the amplifiers in the network significantly suppresses the power transients.
ISSN:1041-1135
1941-0174
DOI:10.1109/68.726782