Audio information is transmitted by beam generated by an injection laser [Progress in Techimology]

IBM recently demonstrated the transmission of audio information over a light beam generated by an injection laser. The injection laser is a relatively simple device that converts electric energy into light waves. The successful experiment involved transmission of music and voice signals over an infrared light beam. While this demonstration involved audio transmission, IBM engineers pointed out that space, military, business, and scientific data could also be sent over injection laser beams in suitably developed systems.