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The state of semiconductor light sources - blue laser diodes and beyond

 

For the past 40 years, semiconductor optical sources, light emitting diodes (LEDs) and laser diodes (LDs) have been steadily changing the world we live in. The advantages of semiconductor lasers over conventional light sources and gas lasers include compact size, low power consumption, low cost and long lifetimes. Accompanying the introduction of semiconductor light sources with improved performance has been a gradual progression from long wavelengths to shorter wavelengths, with semiconductor sources now bridging the entire visible spectrum from red to violet. Over the last decade PARC has been active in developing blue laser diode technology. The first major commercial impact of blue laser diodes will be seen in high-density optical storage, such as DVDs; other potential applications include high-resolution laser printers and full-color projection displays. The newest frontier lies in the realm of ultraviolet (UV), also a focus at PARC. UV sources will enable miniaturization and cost/performance improvements for UV-based systems in applications for biotechnology, solid-state lighting, water purification and UV curing.

 
citation

Johnson, N. M. The state of semiconductor light sources - blue laser diodes and beyond. COMDEX; 2002 November.