J. Riishoj et al., 3-GBIT S 2-LEVEL TO 1.5 GSYMBOL/S 4-LEVEL CONVERTER GAAS IC FOR 2 ELECTRODE SEMICONDUCTOR OPTICAL AMPLIFIER MODULATORS/, Electronics Letters, 29(13), 1993, pp. 1173-1174
A novel design of a 50 OMEGA impedance matched two-to-four level conve
rtor GaAs IC for two electrode semiconductor optical amplifier modulat
ors is presented. Eye diagrams with good eye openings and 0.33 V spaci
ng between adjacent logic levels are demonstrated for bit rates up to
3 Gbit/s.