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We proposed a normalized model to describe the general dynamics of polarization attraction in backward-pumped FRAs using different fibers. The results indicate polarization attraction is mainly determined by Raman gain instead of nonlinear polarization rotation.
We proposed a hybrid fiber Raman/parametric amplifier which can have significant gain enhancement over that of a Raman-assisted fiber optical parametric amplifier using the same length of fiber, Raman and parametric pump powers.
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