30 GHz bandwidth temperature stable 980 nm vertical-cavity surface-emitting lasers with AlAs/GaAs bottom distributed Bragg reflectors for optical data communication

We present a 980 nm vertical-cavity surface-emitting laser (VCSEL) design which achieves 32 GHz small-signal modulation bandwidth ( f 3db ) at 15 °C and record-high 27 GHz at 85 °C. Our devices utilize binary AlAs/GaAs bottom distributed Bragg reflector material layers to improve thermal conductance. We extract key VCSEL figures-of-merit from static optical output power-current-voltage ( LIV ), spectral emission, and high frequency dynamic measurements and observe highly temperature stable performance for these parameters.