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两家电信公司计划铺设世界上第一条用光放大器中继的海底电话光缆。光放大器用光学方法增强光纤中传输的电话信号;而在现有光缆中,光信号要先转变成电信号,放大之后再转换成光信号,每50—100公里中继一次,后一过程比光放大昂贵得多。
The two telecom companies plan to deploy the world’s first submarine telephony cable with optical amplifiers. Optical amplifiers use optical methods to enhance the transmission of telephone signals in optical fibers. In existing optical cables, optical signals are first converted into electrical signals, which are then converted into optical signals after amplification and relayed every 50 to 100 km. The latter process ratio Light amplification is much more expensive.