High-Brightness Nanosecond-Pulse Operation From Tapered-Ridge-Waveguide Lasers

Carrier-induced anti-guiding effects emerging at extremely high injection current densities under short-pulse operation necessitate lateral-waveguide design considerations, that differ from those required when continuous-wave operation is desired. Here, we investigate variations of the lateral index-guiding trench design to achieve an excellent brightness value of 27.4 Wmm
^-1
mrad
^-1
from tapered-ridge-waveguide lasers with more than 18 W output power under 3.3 ns long pulse operation.