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Simultaneous amplification and channel equalization using Raman amplifier for 30 channels in 1.3-μm band

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3 Author(s)
Seo, H.S. ; Dept. of Inf. & Commun., Kwangju Inst. of Sci. & Technol., South Korea ; Oh, K. ; Paek, U.C.

A new technique is proposed to simultaneously amplify signals and equalize power unbalance caused by Raman-induced crosstalk among optical channels in the 1.3-μm band. The crosstalk is induced in GeO2 -doped silica fibers due to the Raman-gain coefficient with a positive slope below the peak-frequency shift of 440 cm-1. Highly doped GeO2 silica fiber, however, shows a negative slope across the band between 440 cm-1 and 490 cm-1. We propose expansion of the Raman-gain band with a negative slope over the bandwidth of 150 cm-1 using multiple pumps. Utilizing the negative gain slope of the proposed band, simultaneous amplification and power equalization was theoretically demonstrated for 30 channels in the 1.310-1.345 μm region without external filters

Published in:

Lightwave Technology, Journal of  (Volume:19 ,  Issue: 3 )

Date of Publication:

Mar 2001

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