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Proceedings Paper

Equalization advantages of OFFH-CDMA over WDM in EDFAs
Author(s): K. Fouli; H. Fathallah; M. Menif; Leslie Ann Rusch
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Paper Abstract

The gain of an EDFA (erbium doped fiber amplifier) is in general wavelength-dependent, leading to different amplification levels among WDM (wavelength division multiplexing) channels. The use of Optical FFH-CDMA (fast frequency hopped code division multiple access) offers a natural diversity of wavelength, and therefore gain, thus eliminating the requirement of an equalization stage to achieve flat gain on all channels. Computer simulations are developed to analyze and compare equalization performance of these two transmission approaches (CDM and WDM) in EDFAs, especially in situations where the EDFA operating point is subject to change (i.e., variable input traffic). We find that WDM requires an equalization stage that fails when packetized traffic characteristics shift, whereas optical FFH-CDMA presents the advantage of more robust, hence truly dynamic, gain equalization.

Paper Details

Date Published: 15 December 2000
PDF: 6 pages
Proc. SPIE 4087, Applications of Photonic Technology 4, (15 December 2000); doi: 10.1117/12.406457
Show Author Affiliations
K. Fouli, Univ. Laval (Canada)
H. Fathallah, Univ. Laval (Canada)
M. Menif, Univ. Laval (Canada)
Leslie Ann Rusch, Univ. Laval (Canada)


Published in SPIE Proceedings Vol. 4087:
Applications of Photonic Technology 4
Roger A. Lessard; George A. Lampropoulos, Editor(s)

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