Dual-pump Raman amplification with increased flatness using modulation instability

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Ellingham, T.J. ; Ania-Castañón, J.D. ; Turitsyn, S.K. ; Pustovskikh, A. ; Kobtsev, S. ; Fedoruk, M.P. (2005)

he application of modulation instability-initiated nonlinear broadening of two CW pumps at different wavelengths, in order to achieve superior gain ripple performance in broadband Raman amplifiers, is demonstrated for the first time experimentally. A particular example using Truewave and LEAF fibers is offered, in which the 0.1 dB gain ripple band is extended from 5 nm to 19 nm. Experimental results are in a good agreement with numerical modeling. Guidelines for optimal broadening are discussed.
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