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originally posted by: markovian
www.photonics.com...
First lazer communication was 1975 ... in the 60s lazers couldent be controled to send and recive data
Photophone Centennial Demonestration --
On February 19, 1980, exactly 100 years to the day after Bell and Tainter's first photophone transmission in their laboratory, staff from the Smithsonian Institution, the National Geographic Society and AT&T's Bell Labs gathered at the location of Bell’s former 1325 'L' Street Volta Laboratory in Washington, D.C. for a commemoration of the event.
The Photophone Centenary commemoration had first been proposed by electronics researcher and writer Forrest M. Mims, who suggested it to Dr. Melville Bell Grosvenor, the inventor's grandson, during a visit to his office at the National Geographic Society. The historic grouping later observed the centennial of the photophone's first successful laboratory transmission by using Mims hand-made demonstration photophone, which functioned similar to Bell and Tainter's mode
America got their first chance to make a video telephone call on Bell's Mod I (Model I) Picturephone. Fair-goers had to wait on line at the Bell Telephone exhibit at the northeast tip of the Fair to hold a 10-minute visual talk with a complete stranger at a similar Picturephone exhibit at Disneyland in California.