Ultra-High-Power and High-Efficiency 905nm Pulsed Laser for LiDAR

Abstract

We report the design, fabrication and characterization of ultra-high-power and high-efficiency 905-nm pulsed lasers with four epitaxially stacked emitters connected by tunnel junctions for LiDAR application. The P-side-up submounted multimode lasers produce as high as 150 W at the current of 35 A and environmental temperature of 25°C. At the output power of 111.5 W, the Wall-Plug Efficiency and slope efficiency reach 41.4% and 4.66 W/A, respectively. The measurement shows $\mathbf{284-\mu m}$ beam width and 12.6-degree horizontal far-field angle (95% power enclosure), indicating high brightness for this device, making it well - suited for long-distance and high-spatial-resolution range finding.