S. Walklin et J. Conradi, ON THE RELATIONSHIP BETWEEN CHROMATIC DISPERSION AND TRANSMITTER FILTER RESPONSE IN DUOBINARY OPTICAL COMMUNICATION-SYSTEMS, IEEE photonics technology letters, 9(7), 1997, pp. 1005-1007
It is shown through numerical simulation that limiting the spectral oc
cupancy of a duobinary optical signal, which can be achieved by an app
ropriate choice of electrical transmitter filter response, is necessar
y in order to receive a benefit from duobinary transmission in single-
mode optical communication systems. It is explained why such band limi
ting gives an improvement in dispersion immunity, and why ideal duobin
ary signaling is ineffective. The results are in good agreement with p
ublished experimental work.