philb@orca.UUCP (10/27/86)
I have a small Helium-Neon laser that I would like to attempt to use for voice communication and desire a little help from those of you who have done this. Is it possible to modulate the laser simply by modulating the input power supply? In this case tube is powered by a 12 volt DC/DC converter. If not then what other "simple" ways of modulating can be used? What about detectors? I would like to be able to detect the beam from a distance of several miles. What kind of detectors work well in this application? Is it possble with a 4 mWatt laser? Can a lens help if the intensity is too weak? Any and all help appreciated, thanks much. Phil Biehl, N7FWL usenet: ...!{decvax,hplabs,zehntel,reed,uw-beaver}!tektronix!orca!philb arpanet: philb%orca%tektronix@csnet-relay.arpa csnet: philb%orca@tektronix.csnet work ph: (503)685-2122 mail: Tektronix Inc., IDG MS 61-028, POB 1000, Wilsonville OR 97070