Communicating with lasers, Pages (1) (2) (3) (4)

 

by Robert F. Gonsett, W6VR, as edited by Tom Farley

 

Saturday, June 24, 2000

 

This story from CGC Communicator #400 provides valuable background information on optical communications: ham radio operators have invented a simple way to beam voice signals through space using inexpensive over-the-counter 'red pointer' lasers. Here's how they did it, using cheap stuff, a proud tradition in the amateur community.

 

The first step in establishing a laser QSO or communication is determining that a clear optical path exists. Here, Stan (W9FQN) at the Palomar Amateur Radio Club Field Day site in Valley Center, CA, sends a mirror flash to Bob Gonsett (W6VR) on Boucher Hill at Palomar Mountain. The flash itself is the white dot in the center of the photo. The tiny circle around the dot is a camera artifact. The white stripe to the right of the dot is the reservoir at the Field Day Site.

 

Flashing this 12.7 mile optical path confirmed that there were no trees, bushes or buildings in the way -- constant problems in optical work. This path would be used again in the evening by N6IZW and W6VR for a laser light QSO, setting a new distance record for laser-voice communications in San Diego County. (next page -->)

 

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   Check out back issues and subscribe to the CGC Communicator, Robert F. Gonsett, Editor  Also, visit the Palomar Amateur Radio Club