GearBits

300-GB Holographic Storage Devices?

Optware Corporation, a Japanese firm specializing in holographic storage media, has demonstrated a practical holographic recording and playback device.

Its system is based on polarized collinear holography, as opposed to conventional holographic recording and playing devices. This system multiplexes the signal and reference beams used for recording and playing of holographic media with just one objective lens.

Conventional technology requires a two-beam axis, a more complex system with precision issues, including positioning the media with each optical axis.

Prototypes shown used a blue-violet semiconductor laser for the signal beam and reference beam, a red semiconductor laser for the servo, and a CMOS image sensor for detection of the playback signals.

Optware says it is on track to introduce a commercial product storing up to 300-GB on a 12 centimeter holographic disc by 2005.