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Photonics Handbook
A unique collection of technical design and applications articles, as well as technology primers presenting the basics of the photonics technology.
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ARTICLE OF THE HOUR
The VCSEL Advantage
Increased Power, Efficiency Bring New Applications
Vertical-cavity surface-emitting lasers (VCSELs) differ from edge-emitting lasers in that their output beam is perpendicular to the top surface of the device instead of parallel to it. Unlike an edge emitter, a VCSEL has a maximum operating power that is not limited by catastrophic optical damage of the exit aperture because its aperture is larger and its PN junction does not intersect the surface in the region of high optical intensity. These and other advantages result in high
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