Le. Nelson et al., Resonances in cross-phase modulation impairment in wavelength-division-multiplexed lightwave transmission, IEEE PHOTON, 11(7), 1999, pp. 907-909
Cross-phase modulation impairment resonances exist in wavelength-division-m
ultiplexed lightwave systems when channels are spared such that there occur
s an integral number of bit walkthroughs per amplifier span. We have observ
ed these resonances in transmission through 624-km standard single-mode fib
er systems having amplifier span lengths of 40, 80, or 120 km, Q measuremen
ts of a 2,5-Gb/s five-channel system over 8 x 80 km with +7 dBm/channel pre
dict on-resonance bit-error rates (BER's) that are several orders of magnit
ude higher than off-resonance BER's,