1880-Alexas end uping well as end upingraGrohfeelBell creates beam call transmission
Optical fiber 1960-the creation of radio and optical fiber
1960-Glass fiber transmission attenuation is greater than 1000dB/km, other materials include aperture waveguide, gas lens waveguide, hollow metal waveguide, etc.
From 1966 to July, the British and Chinese scholar Dr. Kao Kun (KCKao) announced in PIEE magazine the paper "Optical Frequency Dielectric Fiber Appearance Waveguide". Actual analysis proved that optical fiber can be used as a transmission medium to complete optical communication. And predicts the feasibility of manufacturing ultra-low-consumption optical fiber for communication
1970-Three American scientific researchers, Marrell, Capron, and Keck used the improved chemical phase deposition method (MCVD method) to successfully develop a low-wear silica fiber with a transmission loss of only 20dB/km.
1970-American Bell Labs developed the world's first aluminum gallium arsenide with continuous wave mission at room temperature
1972-Transmission attrition dropped to 4dB/km
1973-Wuhan Institute of Posts and Telecommunications, Ministry of Posts and Telecommunications
1974-The Bell Institute of the United States created a low-wear optical fiber construction method-CVD method (vapor phase accumulation method), which reduced the optical fiber transmission attrition to 1.1dB/km.
1976-The American public pipeline at Bell Labs in Atlanta enlightened the world's first practical line of optical fiber communication system. A fiber optic cable with 144 fibers is used to transmit signals at a rate of 44.736Mblood pressures, and the relay distance is 10km. Multi-mode fiber is used, and the light source is LED, Corning. Infrared light with a wavelength of 0.85 microns.
1976- Transmission attrition dropped to 0.5dB/km
1977-Bell Research Institute and Nippon Telegraph and Telephone Company actually developed a semiconductor laser with a successful life of 1 million hours (approximately 10 years)
1977-The world's first optical fiber communication system was put into commercial use in Chicago, USA, with a rate of 45Mb/s
1977-First actual installation of telephone fiber optic network
1978-FORT installed its fiber optic cable in France for the first time
1979-Zhao Zisen produced the first applicable optical fiber independently researched and developed by my country, and he was hailed as the "Father of Chinese Optical Fiber"
1979- Transmission attrition dropped to 0.2dB/km
1980-Commercialization of multi-mode optical fiber communication system (140Mb/s), and started the field mission of single-mode optical fiber communication system
1982-The key scientific research project of the Ministry of Posts and Telecommunications of my country, "The 82nd Project" was enlightened in Wuhan
1990-Single-mode optical fiber communication system entered the commercialization stage (565Mb/s), and started on-site practice of zero-dispersion shift optical fiber, wavelength division multiplexing and related communication, and successively formulated the technical standards of the digital synchronization system (SDH)
1990- Transmission attenuation dropped to 0.14dB/km, which is still close to the actual attenuation limit value of quartz fiber 0.1dB/km
1990- Optical fiber for local area network and other short-distance transmission applications
1992- Bell Labs and Japan cooperated with partners to successfully practice the light shrinkage that can transmit 9000 kilometers without error. The speed was initially 5Gblood pressures, and then increased to 10Gblood pressures.
1993-SDH products started commercialization (below 622Mb/s)
1995-2.5Gb/s SDH products entered the commercialization stage
1996-10Gb/s SDH products entered the commercialization stage
1997-The practice of 20Gb/s and 40Gb/s SDH products using wavelength division multiplexing technology (WDM) achieved a major breakthrough
1999-China's 8×2.5Gb/sWDM system was enlightened for the first time in Qingdao to Dalian, and the 32×2.5Gb/sWDM optical fiber communication system from Shenyang to Dalian was enlightened.
2000-Fiber to the house side => Fiber to the table side
2005-3.2 Tblood pressures ultra-large capacity optical fiber communication system enlightened from Shanghai to Hangzhou
2005 FTTH (Fiend upr To The Home) fiber indirect to the home
In 2012, China's optical fiber production capacity has reached 120 million core kilometers, and it is estimated that it will reach 180 million core kilometers by 2013.
