Matsushita reports that is has developed a product that is an optical pickup part for use in all types of CD and DVD player and drives. It is the industry's first hologram unit equipped with a dual-wavelength laser.
This means that with one optical pickup both CD and DVD content can be played, besides that, it has lower power consumption.
A total of seven optical components are integrated into the plastic unit which is 4.5mm thick, 8.8mm wide, and 4.4mm high. The components are two semiconductor lasers, a coupling prism, a beam splitter, a three-beam grating, a sensing lens, and a photo IC. |
The low-power monolithic dual-wavelength semiconductor laser employs a real-guide laser structure for both red and infrared light, helping reduce optical absorption losses. In emitting red light, the laser consumes 30% less power than conventional single-wavelength lasers. Matsushita has succeeded in creating the monolithic laser by developing for the real-guide laser structure a process, which deposits InGaAlP (indium gallium aluminum phosphide) and GaAlAs (gallium aluminum arsenide) semiconductors on a GaAs (gallium arsenide) wafer.
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Source: Matsushita
