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Densely packed arrays of vertical-cavity surface-emitting lasers (VCSELs) are presented, serving as low-cost and small-sized laser sources in optical particle manipulation systems. A novel, self- aligned fabrication process enables both a pitch in the 20 mum range and a selective surface etch for enhanced transverse singlemode emission. Homogeneous array performance and singlemode output powers of...
A report is presented on intracavity frequency doubling of electrically pumped vertical-extended cavity surface-emitting lasers (VECSELs), establishing a blue light source emitting near 485 nm wavelength. The VECSELs have an InGaAs/GaAs gain region and incorporate a nonlinear optical crystal for frequency doubling. Continuous-wave optical output powers of more than 1.5 mW are achieved.
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