Title :
Duobinary transmitter with low intersymbol interference
Author :
Franck, T. ; Hansen, P.B. ; Nielsen, T.N. ; Eskildsen, L.
Author_Institution :
Lucent Technol., AT&T Bell Labs., Holmdel, NJ, USA
fDate :
4/1/1998 12:00:00 AM
Abstract :
A duobinary transmitter employing two-level electrical drive signals for the modulator, exhibits negligible penalties for transmitting 2/sup 7/-1 as well as 2/sup 31/-1 pseudorandom bit sequences (PRBS´s). Previous implementations of duobinary transmitters have relied on driving the modulator with three-level electrical signals, which are very susceptible to distortion in saturated amplifiers. The logic operation necessary for generating an optical duobinary signal is carried out in the dual-drive Mach-Zehnder modulator.
Keywords :
electro-optical modulation; optical logic; optical transmitters; semiconductor lasers; distortion; dual-drive Mach-Zehnder modulator; electro optical modulator; logic operation; low intersymbol interference duobinary optical transmitter; pseudorandom bit sequences; saturated amplifiers; three-level electrical signals; two-level electrical drive signals; Encoding; Filtering; Intersymbol interference; Optical distortion; Optical filters; Optical modulation; Optical receivers; Optical saturation; Optical transmitters; Voltage;
Journal_Title :
Photonics Technology Letters, IEEE
