High power surface-grating stabilized narrow-stripe broad area lasers with beam parameter product < 2 mm×mrad

Narrow-stripe (30 µm aperture) broad area lasers with monolithically integrated DFB-surface-gratings deliver 5 W optical output per emitter with 50% conversion efficiency, spectral width ≤ 1nm from 970…980nm, and beam parameter product < 2mm×mrad.