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Oct 8th, 2010
Sony launches first 400mW blue–violet laser diode for Blu-ray
Sony Corp has launched the SLD3237VF blue–violet laser diode, manufactured by subsidiary Sony Shiroishi Semiconductor Inc of Miyagi-Prefecture, Japan, which targets use for recording and playing Blu-ray discs, and supports BDXL, a new standard for large-capacity Blu-ray discs, reports Nikkei Electronics.
According to Sony, the SLD3237VF is the first blue–violet laser diode with a pulsed output power of 400mW or higher, allowing the use of a wider variety of optical components such as lenses and prisms and hence freer design of hardware.
Picture: New 400mW-output laser SLD3237VF (left) and 350mW-output laser SLD3237VFR (right).
Sony says that, to realize the high output, innovative technologies are necessary to prevent the end face of a laser resonator being melted by the heat from the laser — i.e. catastrophic optical damage (COD) — and to enhance the quality of the gallium nitride (GaN) crystal, in order to ensure high reliability.
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