Abstract
We describe a model and present simulation results for the optimization of an extended amplification
bandwidth hybrid Raman-Optical Parametric amplifier (HROPA) in Tandem configuration. In this configuration, the Raman
and Parametric processes are separated and each one takes place in a separate span of fiber, allowing for optimization
of amplification gain (e.g., > 20 dB), gain bandwidth (e.g., 170 nm) and gain ripple (e.g., <
4 dB). We also focus on the potential signal degradation performance due to the generation of idlers within the
operational bandwidth. To overcome this limitation, we propose and model a modified HROPA design, which allows for the
management and the suppression of idlers in the amplifier. The idler suppression is achieved through partitioning the
channels in two sub-bands and using a wavelength-division multiplexed DEMUM/MUX pair to limit/suppress the idlers, as
well as crosstalk terms generated in the amplifier. Our study shows that with proper selection of pump wavelength and
power and engineering the HROPA with correct filter transfer function, we can achieve error free performance even in
the case when significant misalignment of the transmitter wavelength from the center of the coarse WDM channel band
exists.
© 2013 USGov
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