Stephen Tiefenbach Keller

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We present a prototype for a Tangible User Interface designed for interactive data visualization, which we believe will be useful for facilitating collaborative work in data analytics. Our hybrid system combines a tabletop graspable user interface with a two-dimensional screen display; the users interrogate the data by manipulating tokens on the tabletop(More)
We report on recent status of vertical cavity lasers emitting in the 1.3 μm waveband comprising AlInGaAs/InP active regions wafer fused to Al(Ga)As/GaAs distributed Bragg reflectors. This technique produces vertical cavity surface emitting lasers (VCSELs) emitting in 4 channels of the 1310 nm coarse wavelength division multiplexing band that enabled(More)
We report on 1270 nm vertical-external-cavity surface-emitting lasers (VECSELs) with up to 59% conversion efficiency and maximum output power of 8.5 W (pump limited), at 5°C heat sink temperature. These VECSELs comprised wafer-fused gain mirrors in the flip-chip (thin-disk) heat dissipation scheme. The reflected pump light from the gain mirror surface was(More)
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