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The first optical communication systems were designed and delivered to the U.S. Army and Chevron by Optelecom, Inc., [12] the venture co-founded by Gordon Gould, the inventor of the optical amplifier [13] and the laser.
- Semaphores and Heliographs
- Bell’s Greatest Invention
- Guiding Light Through Glass
- Internet from Your Light Bulb
- Going Long Range
Since light can travel in air much further than sound, visual communication has always been the method of choice to broadcast information over long distances. One of the earliest examples is the Phryctoriae from ancient Greece, a system of towers built on mountaintops that could send messages by lighting torches. Allegedly, this is how the news of ...
Many of you probably know the kind of DIY projects where an audio signal is transmitted by a laser beam which is surprisingly easy to build. The invention goes back to Alexander Graham Bell, who in 1880 invented the photophone which he thought to be his “greatest invention ever made, greater than the telephone”. It could transmit speech wirelessly ...
Apart from a few military projects, telecommunication in the 20th century was mainly conducted via coaxial cables and microwave signals in the relatively low frequency 1-10 GHz range. This was until the development of fiber-optic communications in the 1970s, which was enabled by the invention of low-loss optical fibers and semiconductor lasers. The...
We still mostly use the RF spectrum for wireless communication, but there has been some renewed interest in wireless optical. At short distances, this goes under the catchy name LiFi and became a trendy topic about 10 years ago, partly triggered by this TED talk. It advertised the idea of using the already existing infrastructure of regular LED lig...
The optical transmission of data over long ranges goes under the name free-space optical communication (FSO). You may remember Facebook’s Aquila drone program, a giant solar-powered vehicle that should stay in the stratosphere for months to beam internet to remote areas. In addition to standard GHz frequency bands for air-to-ground communication, t...
Dec 14, 2016 · This chapter began with a brief history of optical communication before describing the main components of a modern optical communication system. Specific attention was paid to the development of low-loss optical fibers as they played an essential role after 1975.
- Govind P. Agrawal
- Govind.Agrawal@rochester.edu
- 2016
Sep 25, 2018 · Charles Kao was ahead of his time. He invented fiber-optic communications when the conventional wisdom was that solids were too lossy to carry signals over long distances.
Dec 14, 2016 · This chapter begins with a brief history of optical communication before describing the main components of a modern optical communication system.
- Govind P Agrawal
Charles K. Kao initiated the search for and the development of the low-loss optical fiber presently used in optical fiber communication systems. Willard S. Boyle and George E. Smith invented the charge-coupled device (CCD) presently used in many digital cameras and in advanced medical and scientific instrumentation.
Corning Glass researchers Robert Maurer, Donald Keck, and Peter Schultz invented fiber-optic wire or “optical waveguide fibers” (patent no. 3,711,262), which was capable of carrying 65,000 times more information than copper wire, through which information carried by a
