Sony Laser Enables 1TB Optical Disks

It was just a short while ago that Sharp announced its first BDXL Blu-ray disks, with a capacity of 100GB and, soon after, TDK revealed its own plans to join this movement. Later, once the first batch of disks starts selling, the two hope to move on to 128GB disks. Needless to say, these capacities are nothing to be frowned upon, but they may not keep their title as greatest for as long as some might think. Sony, in partnership with Tohoku University of Japan, have apparently developed a laser that has a watt output 100 times higher than the currently highest values for conventional blue-violet pulse semiconductor lasers.

Basically, the new type of laser has an output of 100 watts and supposedly has the ability to scribe up to 20 times more data on a disk, compared to 'regular' Blu-ray. Essentially, this equals about 1TB. Granted, this technology isn't exactly in line with the vision of a future completely free of the need for optical storage, but a technology like this is still a great step forward. Unfortunately, there was absolutely no mention of how long it will take for it to see practical implementations.

“This latest successful development is an all-semiconductor laser picosecond pulse source with a laser wavelength of 405 nanometers (1 nm = one-billionth of a meter) in the blue-violet region,” the Sony/Tohoku University press releasereportedly states. “It is capable of generating optical pulses in the ultrafast duration of 3 picoseconds (1 picosecond = one-trillionth of a second), with ultrahigh output peak power of 100 watts and repetition frequency of 1 gigahertz. Advanced control of the newly-developed and proprietarily-constructed GaN-based mode-locked semiconductor laser and semiconductor optical amplifier have enabled peak output power in excess of 100 watts to be achieved, which is more than a hundred times the world’s highest output value for conventional blue-violet pulse semiconductor lasers.”

“There are high expectations that this newly-developed semiconductor laser system, which incorporates semiconductor diodes, will be able to be used in a much wider range of applications in the future thanks to technology such as this, which enables the size of devices such as the light source box to be drastically reduced,” they added.