1.5 W diffraction-limited-beam operation from resonant-optical-waveguide (ROW) array

Strong intermodal discrimination is demonstrated for antiguided diode-laser arrays designed to operate in a resonant condition for the inphase mode. These resonant-optical-waveguide (ROW) arrays radiate in a diffraction-limited beam up to 1.5 W under pulsed operation and 360 mW under CW operation, without need for active phase control.