1D Confocal Broad Area Semiconductor Lasers (Confocal BALs) for Fundamental Transverse Mode Selection (TMS#0)

Figure 1

Light microscope image (top-view) of a confocal BAL resonator with a bow-tie-shaped laser ridge and, in this example, a 32 μm wide constriction in the middle plane. The resonator length and the radii of curvature are 1 mm.