Abstract
Recently, 670-nm wavelength GaInP/AlGaInP visible laser diodes have been attractive devices in a wide variety of uses such as a high quality laser beam printer, optical disk systems, a high density bar-code reader, and high resolution optical sensors. In such applications except for high density optical disk systems, the important device performance is not their coherence but their characteristics of high output power, visible wavelength, and pinpoint emission. These requirements should be satisfied by achieving a high-power, pinpoint,1 and visible emission LED. Moreover, this kind of LED is more desirable than a LD because it can be used free from interference noise and laser safety regulation.
© 1992 Optical Society of America
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