Abstract
The semiconductor diode lasers currently used in optical data storage applications have wavelengths limited to 780 < λ < 870nm, and the recent availability of shorter wavelength lasers can potentially lead to major improvements. The use of visible semiconductor lasers in such systems will allow greater packing densities and higher data transfer rates, since the diffraction-limited spot size is proportionally reduced with wavelength. Furthermore, the output power required for writing is reduced at shorter wavelengths.
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