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We review our work on short-wavelength transverse single-mode or multimode VCSELs that show stable linearly polarized light output owing to the incorporation of surface gratings. An emphasis is put on optical sensing and communications applications.
A model is presented which is capable to handle real three-dimensional VCSEL geometries and to simulate above threshold operation even exceeding thermal rollover. Comparisons with experimental data indicate that all relevant effects are properly included.
We present a carefully elaborated layer design for semiconductor disk lasers. Experimental results of devices mounted on simple copper heat spreaders reveal record conversion efficiencies at 13.2 W for 970 nm wavelength laser emission.
We report the monolithic integration of vertical-cavity surface-emitting lasers (VCSELs) with curved dielectric mirrors. The laser structure has an InGaAs/GaAs gain region and incorporates a photoresist pattern fabricated on the substrate side. A dielectric distributed Bragg reflector is applied on the curved photoresist surface which provides sufficient optical feedback for laser operation. On-wafer...
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