Equalization advantages of OFFH-CDMA over WDM in EDFAs

K. Fouli; H. Fathallah; M. Menif; Leslie Ann Rusch

doi:10.1117/12.406457

15 December 2000 Equalization advantages of OFFH-CDMA over WDM in EDFAs

K. Fouli, H. Fathallah, M. Menif, Leslie Ann Rusch

Proceedings Volume 4087, Applications of Photonic Technology 4; (2000) https://doi.org/10.1117/12.406457
Event: 2000 International Conference on Application of Photonic Technology (ICAPT 2000), 2000, Quebec City, Canada

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.

Citation Download Citation

K. Fouli, H. Fathallah, M. Menif, and Leslie Ann Rusch "Equalization advantages of OFFH-CDMA over WDM in EDFAs", Proc. SPIE 4087, Applications of Photonic Technology 4, (15 December 2000); https://doi.org/10.1117/12.406457

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