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《Telecommunications For Electric Power System》 2005-05
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Scheme for ultra-long span optical fiber communication system

YU Zhang-wei~1,ZHANG Xu-liang ~1,JIN Ru-xiang ~2,HUANG Jun-hua ~3 (1.Center for Optical and Electromagnetic Research, Zhejiang University,Hangzhou 310027,China; 2.Lightelli Corporation,Shanghai 201614,China; 3.Tongguang Group Co.,Ltd, Shanghai 200122,China)  
Extending the distance of single segment unrepeated transmission can decrease the quantity of electric repeaters and optic repeaters among network nodes, there are practical significance for reducing cost of long distance transmission. The paper analyzes the key technique, performance advantage and economic benefit of ultra-long span transmission in optic communication, introduces the current status of technology development in China and other countries,ad presents; a transmission scheme of 2.5 Gbit/s over 250 km unrepeated span, which is based on the DFRA+EDFA hybrid amplification technology. This scheme adoptes mature technique, uses devices easily available,therefore has high ratio of quality over price.
【CateGory Index】: TN929.1
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