N. Takeda et al., Study on insertion spacing of inline active gain slope controller for transoceanic WDM systems, IEEE PHOTON, 12(6), 2000, pp. 723-725
We have studied the effect of insertion spacing of inline active gain slope
controllers in transoceanic wavelength-division multiplexing systems using
a 3500-km-long circulating loop. We found that 1000-km insertion spacing i
s sufficient for 10 000-km transmission systems.