A semiconductor laser that emits ... than other colors, blue lasers became commercially available in 2001. Blue diode lasers allow for smaller pits to be used in optical discs (CD-ROMs use 780 ...

Blu-ray aimed to answer DVD's shortcomings. It allows you to see more depth, a wider range of color shades, and more image detail. DVD uses red laser technology. The Blu-ray Disc format uses blue ...