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Frequency response of large aperture oxide-confined 850 nm vertical cavity surface emitting lasers

Mutig, A.; Blokhin, S. A.; Nadtochiy, A. M.; Fiol, G.; Lott, James A.; Shchukin, V. A.; Ledentsov, Nikolai N.; Bimberg, Dieter

Inst. Festkörperphysik

Small and large signal modulation measurements are carried out for 850 nm vertical cavity surface emitting lasers (VCSELs). The resonance frequency, damping factor, parasitic frequency, and ūĚź∑-factor are extracted. Small signal modulation bandwidths larger than 20 GHz are measured. At larger currents the frequency response becomes partially limited by the parasitics and damping. Our results indicate that by increasing the parasitic frequency, the optical 3 dB bandwidth may be extended to ‚ąľ25GHz. A decrease in the damping should enable VCSEL bandwidths of 30 GHz for current densities not exceeding ‚ąľ10kA/cm2 and ultimately error-free optical links at up to 40 Gbit/s.
  • This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Appl. Phys. Lett. 95, 131101 (2009) and may be found at https://doi.org/10.1063/1.3231446.