We have measured the active region size dependence of the high speed modulation characteristics of vertical cavity surface emitting lasers with lateral current injection. The moveout rate df$-0$/d$ROOT@P and K factor determined from a curve fit to the small signal modulation data were df$-0$/d$ROOT@P $APEQ 4.5-6.5 GHz/$ROOT@mW and K $APEQ 0.68-0.85 ns for both 10 and 20 micron diameter devices. The maximum resonance frequency was limited by device heating, and a parasitic type of rolloff in the modulation response was observed, which we fit to a diffusion capacitance model.
展开▼
