10 W near-diffraction-limited peak pulsed powerfrom Al-free,0.98 µm-emitting phase-locked antiguided arrays

Abstract

10 W peak-pulsed power emitted in a beam pattern 2×diffraction limit (DL) is obtained from a 40-element, 200 µm-aperture Al-free phase-locked antiguided array (λ = 0.98 µm). 60% of the power resides in the central lobe, and the external differential quantum efficiency is 54% for 1 mm-long optimised facet-coated devices.