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Transient effects in gain-clamped discrete Raman amplifier cascades

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2 Author(s)
Bolognini, G. ; Scuola Superiore Sant''Anna di Studi Universitari e Perfezionamento, Pisa, Italy ; Di Pasquale, F.

This letter describes the dynamic characteristics of all-optically gain clamped discrete Raman amplifier chains. Amplifier cascades are analyzed under channels add/drop conditions in large bandwidth WDM metro-core applications. Numerical results show that the long Raman fiber length does not allow instantaneous gain clamping giving rise to wide power oscillations in long Raman amplifier chains. A possible way to limit this detrimental effect is suggested and numerically demonstrated.

Published in:

Photonics Technology Letters, IEEE  (Volume:16 ,  Issue: 1 )