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Capacity upgrades of transmission systems by Raman amplification

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9 Author(s)
Hansen, P.B. ; Bell Labs., Lucent Technol., Holmdel, NJ, USA ; Eskildsen, L. ; Grubb, S.G. ; Stentz, A.J.
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Raman amplification is added to a transmission system to provide an increase in power budget allowing for a four-fold upgrade in capacity either by TDM or WDM. Here, a TDM upgrade from 2.5 to 10 Gb/s and a WDM upgrade from a single 10-Gb/s channel to four channels of 10 Gb/s each were experimentally verified with an improvement in the power budget of 7.4 dB. Raman gain is an attractive upgrade method for installed systems requiring no changes to the fiber span.

Published in:

Photonics Technology Letters, IEEE  (Volume:9 ,  Issue: 2 )