Compact groups of three electrically-parallel 980 nanometer oxide-confined vertical-single-cavity surface-emitting lasers via on-wafer testing exhibit record room temperature small-signal modulation bandwidths of 20 to 25 gigahertz and corresponding large optical output powers of 60 to 20 milliwatts, respectively, and back-to-back 25 gigabit-per-second error-free data transmission.