Usually, these advanced devices require large, costly ultrashort-pulse lasers as excitation sources. However, realizing a practical far-ultraviolet light source requires a blue semiconductor laser ...

[Jay] hacked a Blu-Ray laser diode into a keychain enclosure. He found a heavy brass keychain light from Lowe’s and stuffed the diode and a larger battery inside. The existing batteries weren ...

While [Micah] want’s to use these Blu-ray drives for laser graffiti, there are a number of other slightly more useful reasons for the build. With a DVD drive, you can hold a red blood cell in ...

and Blu-Ray discs. “Philips [and] Sony were so frustrated by that loss that they started a new disc format, using a blue laser,” Immink says. The development took longer than expected ...