Publicaties

We present an equivalent circuit cut-off frequency analysis of a Coupled-Cavity Vertical-Cavity Surface-Emitting Laser with one cavity used as a fast electro-optic modulator with lumped electrodes. We find that the mesa capacitance and the polyimide capacitance and series resistance are the most influencing parameters. In order to enhance the -3 dB bandwidth the design steps should be: reduction of the contact pad area and modulator mesa radius ...

Vertical-Cavity Surface-Emitting Lasers, due to their properties, are one of the best choices for optical communication purposes. Although direct modulated VCSELs have reached error free operation at speed of 40 Gbit/s, however, their cut-off frequency is limited by the relaxation oscillation phenomenon and is not likely to be further increased. Recently, it has been suggested that properly designed Coupled Cavity VCSEL with one cavity used as a ...

We present a novel design of an electro-optically modulated coupled-cavity vertical-cavity surface-emitting laser (CC-VCSEL) with traveling wave electrodes of the modulator cavity, which allows to overcome the RC time constant of a traditional lumped electrode structures. The CC-VCSEL optical design is based on longitudinal mode switching which has recently experimentally demonstrated a record modulation speed. We carry out segmented ...

We present a design of a high speed electro-optically modulated coupled-cavity vertical-cavity surface emitting laser monolithically integrated in a traveling wave electrode structure (TW EOM CC-VCSEL). Such electrical configuration allows to overcome RC time constant limitations of a traditional lumped electrodes design. We use segmented transmission line to match the impedance of the whole structure to the 50 Omega electrical network. We use ...