The GI fiber-based optical fiber transmission system was adopted in 1982 for actual use after commercial test in 1980. In the second period, development of single mode (SM) fiber*2 also began using the MCVD method. By late August 1982 a length of 18. 25 km of lightweight fiber optic submarine cable, type SL, had been manufactured by Simplex, and the cable and a repeater with two 274 MB/s regenerators were ready for test. A 1983 short film from the AT&T Tech Channel, “SL Lightwave Undersea Cable System,”. Charles Kao of Standard Telephone and Cables (UK) reveals on how to make low loss fiber suitable for communications using an optical cladding over a pure glass core and removing impurities, plus ideally singlemode operation. (Awarded Nobel Prize in 2009) Ethernet was invented at Xerox Palo Alto. Fiber to the home (FTTH) trials begun in Japan and France, costs were very high, application waited until development of passive optical networks. It was constructed in 1988 by a consortium of companies led by AT&T Corporation, France. Until 1982, voice phone calls were a utility, like electricity or water. (The technology itself was standardized as 10BaseFL in the.
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