Specialty Optical Fibers Handbook

The ability to employ high levels of Raman gain with cost and power effi-

ciency without noise from nonlinear impairments makes possible very high

capacity transmission in the traditional C- and L-bands, as well as novel archi-

tectures for lower cost systems in demanding applications. In the area of high

capacity-distance product transmission, 160-  42.7-Gbps channels spaced at

50 GHz have been transmitted over 3200 km of TrueWave REACH using the

single CþL DCM [52], for a spectral efficiency of 0.8 bps/Hz and capacity-

distance product of 20 Pbps*km [53]. It has been shown experimentally that

the moderate A

eff

of the NZDF Tx fibers, responsible for the larger Raman gain,

presents only a small XPM penalty across a wide range of launch powers when ...