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Proceedings Paper

Modeling dynamic behavior of erbium-doped fiber amplifiers in all-optical ring networks
Author(s): Doutje T. van Veen; B. H. Sikken; Federiko N. Krommendijk; Antonius M. J. Koonen
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Paper Abstract

Erbium doped fiber amplifiers (EDFAs) are often used in multiwavelength networks. When these networks are reconfigured or when wavelength-channel failures occur, cross-gain modulation in the amplifiers causes power- fluctuations of the remaining channels. Up to now only result of dynamic models of a single EDFA and chains of EDFAs were presented in literature. We investigated the dynamic gain-behavior of EDFAs placed in a ring-network with respect to the effect of recirculating fluctuating crosstalk. For this purpose we implemented the electrical equivalent of an analytical dynamic EDFA-model into SPICE. Also optical add-drop multiplexer (OADM) functionality was transformed into an electrical equivalent. Rings and chains based on 1 to 9 OADMs, with an EDFA in each node were modelled. In the simulations two wavelength-channels were added and dropped, and the effect of a failure of one channel was investigated by monitoring the power of the remaining channel. We found that the rising-speed of the remaining channel power increases with the pass to drop power-ratio (which is actually the crosstalk to signal power-ratio, XSR). This means that a gain control to compensate for the power-fluctuations needs to be faster when EDFAs are configured in a ring-structure instead of a chain with the same number of EDFAs. The dynamic behavior of EDFAs in a ring-structure converges to that of EDFAs in a chain when the XSR reaches zero.

Paper Details

Date Published: 7 October 1998
PDF: 6 pages
Proc. SPIE 3531, All-Optical Networking: Architecture, Control, and Management Issues, (7 October 1998); doi: 10.1117/12.327085
Show Author Affiliations
Doutje T. van Veen, Univ. Twente (Netherlands)
B. H. Sikken, Univ. Twente (Netherlands)
Federiko N. Krommendijk, Univ. Twente (Netherlands)
Antonius M. J. Koonen, Lucent Technologies Nederland BV and Univ. Twente (Netherlands)

Published in SPIE Proceedings Vol. 3531:
All-Optical Networking: Architecture, Control, and Management Issues
John M. Senior; Chunming Qiao, Editor(s)

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