Abstract
The most surprising thing about the birth of the diode laser 45 years ago is that it happened so quickly. Physicists had known about light-emitting semiconductors for decades, but the devices drew little attention due to their weak output. Then a key experiment showed that diode junctions could emit very efficiently, and, within four months, four groups had crossed the threshold to demonstrate diode lasers.
© 2007 Optical Society of America
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