In 1957, Braunstein further demonstrated that the rudimentary devices could be used for non-radio communication across a short distance. As noted by Kroemer Braunstein".. had set up a simple optical communications link: Music emerging from a record player was used via suitable electronics to modulate the forward current of a GaAs diode. The emitted light was detected by a PbS diode some distance away. This signal was fed into an audio amplifier, and played back by a loudspeaker. Intercepting the beam stopped the music. We had a great deal of fun playing with this setup." This setup presaged the use of LEDs for optical communication applications.
In 1957 , Braunstein further demonstrated that the rudimentary devices could be used for non - radio communication across a short distance . As noted by Kroemer Braunstein " .. had set up a simple optical communications link : Music emerging from a record player was used via suitable electronics to modulate the forward current of a GaAs diode . The emitted light was detected by a PbS diode some distance away . This signal was fed into an audio amplifier , and played back by a loudspeaker . Intercepting the beam stopped the music . We had a great deal of fun playing with this setup . " This setup presaged the use of LEDs for optical communication applications .
Who discovered non-radio uses for early LED devices?
Who discovered non - radio uses for early LED devices ?
Kroemer Braunstein
Kroemer Braunstein