Arrays Of Vertical Cavity Surface-Emitting Lasers Go Commercial
New vertical cavity surface-emitting lasers (VCSELs) solve many of the problems that plague edge-emitting lasers by making a simple, but revolutionary, "right turn" to allow light emission perpendicular to the semiconductor wafer surface. VCSELs are patterned using standard integrated circuit fabrication techniques and "vertically" emit round low-divergence light beams.
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