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据报道,日本电信电话公司在世界上首次利用光孤立子传输信号达百万千米获得成功。这项实验是由日本电信电话公司的励磁系统研究开发中心光通信线路研究部进行的。光孤立子在传送时,由于光纤造成的损耗,光波衰减,不能保持光孤立子的密度,因此,该部无环形线路中设置了11个光放大器(铒光放大器)。此外,还在环形线路中插入铌酸锂晶体的高速光调制器,以便对传送的光孤立子数据脉冲除去杂音,并且矫正脉冲位置和波形紊乱。从而,确立了作为下一代超高速光通信基础技术的光孤立子控制技术,在克服通信距离障碍方面取得了新进展,并预期能在国际海底光缆等远距离、超高速光通信方面得到应用。
It is reported that Nippon Telegraph and Telephone Corporation has succeeded in using the optical soliton to transmit signals of up to 1 million kilometers for the first time in the world. The experiment was conducted by the Optical Communication Line Research Department of Excitation System Research and Development Center of Nippon Telegraph and Telephone Corporation. When the optical soliton is transmitted, due to the loss caused by the optical fiber, the light wave attenuates and can not maintain the density of the optical soliton. Therefore, 11 optical amplifiers (erbium optical amplifiers) are provided in the ringless circuit of the optical part. In addition, a high-speed optical modulator of lithium niobate crystals is also inserted in the ring line to remove noise from transmitted optical soliton data pulses and correct for pulse position and waveform turbulence. As a result, optical soliton control technology, which is the fundamental technology of next generation ultra-high-speed optical communication, has been established. New progress has been made in overcoming communication distance obstacles and is expected to be applied in long-distance and ultra-high-speed optical communications such as international submarine optical cable.