News Article

Sony Launches 400 MW Blu-ray Laser

Japanese electronics giant Sony claims to have launched the world’s first 400 mW laser for recording and playback of Blu-ray Discs.

 Sony has started to ship 400 mW blue-violet semiconductor laser chips that are suitable for recording and playback of Blu-ray Discs.

This powerful source is claimed to be the first that can be used to support the BDXL format, which was first defined this June.  This format supports 100GB and 128GB write-once discs and 100GB re-writable equivalents.

According to Sony, the 400 mW output gives the makers of Blu-ray equipment a greater choice of lenses and prisms. 

The key to making the lasers has been an improvement in GaN crystal quality, which stems from the introduction of a new MOCVD growth system. Superior GaN material prevents device failure via optical damage to the laser’s facets.

The 400 mW is mounted in a package with a 5.6 mm diameter. If a slimmer 3.8 mm diameter package is used, power is limited to 350 mW.

Manufacture of the lasers is carried out by Sony’s subsidiary, Sony Shiroishi Semiconductor Inc.



 Figure caption: Sony’s lasers can deliver 400 mW at 405 nm, and operate at up to 85 degrees C
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