High-power operation of beam-quality-improved InGaN lasers with lateral corrugated waveguides

Both high-beam-quality and high-power operation of InGaN laser diodes are realized by lateral corrugated waveguides with reduced higher-order transverse modes. As a result, lateral beam-quality factor is reduced from 8.8 (straight waveguide) to 3.8 even at a continuous-wave output power of 2.1 W.