17 May 2010 A study of the quantitative impact of pump-pump interaction in wide-band Raman amplifiers in the S, C and L bands
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Abstract
A quantitative study on the impact of pump-pump interaction in wide band Raman amplifiers in the S, C and L bands is reported here. For this purpose, the nonlinear coupled Raman equations are written in a novel format separating the different mechanisms which contribute to gain profile, among them, pump-pump interaction. The study is applied to a modern low loss fiber under three pump excitation. The minimum total pump power required to pump-pump interaction mechanisms is investigated for the co and couter propagating amplifier configuration. These threshold power level is significantly different for both configurations. In the co propagating configuration it is independent on the amplifier length while for the counter propagating configuration it is dependent on the amplifier length. to affect gain profile is dependent on fiber length for the counter propagation amplifier configuration while it is independent on fiber length for the co-propagating configuration. Further, a sensitivity analysis of gain flatness as a function of the central pump wavelength power is conduction for both amplifier configurations. The counter propagation configuration is less sensitive to center wavelength power level variation when compared to the co propagating configuration.
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R. F. R. de Farias, P. H. S. Belisario, M. A. G. Martinez, M. T. M. R. Giraldi, M. J. Pontes, "A study of the quantitative impact of pump-pump interaction in wide-band Raman amplifiers in the S, C and L bands", Proc. SPIE 7721, Solid State Lasers and Amplifiers IV, and High-Power Lasers, 77210S (17 May 2010); doi: 10.1117/12.854621; https://doi.org/10.1117/12.854621
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