Regensburg 2010 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 14: Nanophotonics - Devices II (Focused Session with DS)
HL 14.6: Topical Talk
Montag, 22. März 2010, 16:45–17:15, H2
High speed VCSELs for short reach DATACOM applications — •Alex Mutig1, James Lott2, Sergey Blokhin1, Gerrit Fiol1, Alexey Nadtochiy1, Vitaly Shchukin3, Nikolai Ledentsov2, and Dieter Bimberg1 — 1Institut für Festkörperphysik und Zentrum für Nanophotonik, Technische Universität Berlin, Hardenbergstrasse 36, 10623 Berlin, Federal Republic of Germany — 2VI Systems GmbH, Hardenbergstrasse 7, 10623 Berlin, Federal Republic of Germany — 3PBC Laser GmbH, Hardenbergstrasse 36, 10623 Berlin, Federal Republic of Germany
Around the year 2001 VCSELs emerged as the key component for up to 10 Gbit/s, aggregated high speed local-area and storage-area network data communication systems and soon thereafter for optical cable links for computer and consumer applications as well. The rapid increase in serial transmission speed and the limitations of copper wire-based links at bit rates >10 Gbit/s and distances >1 m greatly expanded the possible application areas of fiber-optic interconnects. Here we present our work on oxide-confined VCSELs operating at bit rates up to 40 Gbit/s and at low current densities of ∼10 kA/cm2, sufficient for reliable operation. The small signal modulation bandwidths and resonant frequencies up to ∼22 GHz are measured, and the relaxation resonance frequency, damping factor, and electrical parasitic cut-off frequency are evaluated. According to our results with further improvement in the device design to reduce parasitics optical modulation bandwidths exceeding 30 GHz can be realized, leading toward reliable VCSEL serial operation at rates up to 50 Gbit/s.
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