High-Speed Oxide Confined 850-nm VCSELs Operating Error-Free at 40 Gb/s up to 85 $^{\circ}{\rm C}$

We present the temperature dependence of the performance characteristics of our latest generation high-speed oxide confined 850-nm vertical cavity surface-emitting lasers (VCSELs). Using a 7- $\mu{\rm m}$ oxide aperture diameter VCSEL, we demonstrate a maximum modulation bandwidth of ${\sim}{\rm 27}~{\rm GHz}$ at room temperature and ${\sim}{\rm 21}~{\rm GHz}$ at 85 $^{\circ}{\rm C}$ . With a new high-speed optical receiver, these bandwidths enable error-free data transmission (defined as a bit-error-rate ${< }10^{-12}$ ) at bit-rates up to 47 Gb/s at room temperature, and up to 40 Gb/s at 85 $^{\circ}{\rm C}$ .