High-power, narrow-beam, single mode ARROW-type semiconductor diode lasers

Summary form only given. By increasing the interelement optical absorption loss in 0.98 /spl mu/m-wavelength three-core ARROW-type diode lasers we have achieved, from 20 /spl mu/m-aperture devices, a diffraction-limited beam pattern to 0.55 W peak-pulsed power with 78% of the light in the central lobe, and near diffraction-limited operation to 0.7 W.