4-5 ps optical pulse generation with 40 GHz train from low driving-voltage modulator modules

Optimization of InGaAs/InAlAs multiple quantum well modulator structures, as well as polarization insensitivity and low chirp was investigated as a function of well thickness and strain magnitude and very short optical pulses with 4-6 ps was obtained using a low driving-voltage (2.0 V/sub pp/) electroabsorption modulator module operating at a 40-GHz large signal modulation.