Variants
Due to the spectral filtering process, the regenerated pulse is intrinsically shifted from the original frequency. This can be beneficial if wavelength conversion is to be achieved simultaneously the regeneration and therefore channel switching can be considered. However, if one wants to recover an output signal having the initial wavelength, an option of applying another regeneration with the BPF center frequency placed at the original channel center frequency allows to overcome this problem. Note that this can be done in a single fiber using a bidirectional propagation in the nonlinear fiber.
Read more about this topic: Mamyshev 2R Regenerator, Mamyshev Regenerator
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