High-Performance Blue And Green Laser Diodes Based On Nonpolar/Semipolar Bulk Gan Substrates

We present state-of-the-art performance from green and blue InGaN-based laser diodes fabricated on nonpolar/semipolar substrates. Using these novel crystal orientations, we demonstrate high-power, high-efficiency, and long-lifetime continuous-wave laser operation. For green wavelengths at 520 nm, we report on continuous wave single mode lasing with over 65 mW of output power and wall plug efficiencies over 2%. In the blue regime we describe single-mode lasers operating with over 23% wall-plug-efficiency and with output powers greater than 750 mW. To the best of the author's knowledge, this efficiency represents the highest reported to date for a single-mode blue laser. These InGaN-based devices offer dramatic improvement in performance, size, weight, and cost over conventional gas and solid state lasers for use in defense, biomedicine, and consumer projection displays.