Me. Marhic et al., OPTIMIZING THE LOCATION OF DISPERSION COMPENSATORS IN PERIODICALLY AMPLIFIED FIBER LINKS IN THE PRESENCE OF 3RD-ORDER NONLINEAR EFFECTS, IEEE photonics technology letters, 8(1), 1996, pp. 145-147
In order to minimize third-order nonlinear effects while compensating
dispersion in a periodically amplified link, it is more effective to p
lace a single dispersion compensator at the end of the link than to in
dividually compensate each segment. The improvement obtained by using
the former approach instead of the latter one, defined as the ratio of
the powers of the four-wave mixing products in the two cases, is (sin
N u/N sin u)(2), where N is the number of segments, and u represents
phase mismatch. We have experimentally verified this conclusion, by pe
rforming a cross-phase modulation experiment in a two-segment link.