| http://www.w3.org/ns/prov#value | - For example, they are used as light sources in an optical disc recording/reproducing apparatus, a display apparatus such as a laser display or the like, a laserprinter apparatus, and a light communicating apparatus.Hitherto, semiconductor lasers of an AlGaAs system, AlGaInAs system, and AlGaInP system have already been commercialized as such semiconductor lasers.
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