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Mitsubishi Electric was awarded the 51st Okochi Memorial Foundation Prize
(Grand Production Prize) for "The development and production of
high-power red lasers for recordable DVDs".
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The destruction of the laser mirror has been an obstacle to the
creation of high-power semiconductor lasers. Addressing this problem,
Mitsubishi Electric made good use of an original window mirror structure
and its processing technology and succeeded in 1997 in mass-producing
a high-power laser for 1st generation recordable DVD for the first
time in the industry. Later, it developed a highly efficient optical
waveguide structure, further increased output power by developing
long cavity technology, and in 2004 succeeded in mass-producing
a 250mW optical output laser for 16X speed recording, the fastest in
the industry. As a result, Mitsubishi Electric's market share reached
80%, with production of about 6 million units monthly, predominantly
250mW lasers for maximum speed 16X recording.
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