太比特
计算机科学
自由空间光通信
传输(电信)
波分复用
千兆位
电子工程
光通信
误码率
信号(编程语言)
电信
光学
物理
工程类
波长
频道(广播)
程序设计语言
作者
E. Ciaramella,Yoshinori Arimoto,G. Contestabile,M. Presi,A. D’Errico,V. Guarino,Mitsuji Matsumoto
标识
DOI:10.1109/jsac.2009.091213
摘要
We review a novel free space optical (FSO) system that represents a significant breakthrough in the area of FSO communications. The system encompasses a pair of novel terminals: these allow direct and transparent optical connection to common single mode fibers and include a dedicated electronic control unit that effectively tracks the signal beam wandering due to atmospheric turbulence and mechanical vibrations. Further improvement in the signal power stabilization is achieved by means of saturated EDFAs. These solutions allow to realize a new FSO system, which is tested in a double-pass FSO link between two buildings in Pisa, Italy. When the terminals are fed by common WDM signals they allow enough power budget and margins to support a record high capacity transmission (32times40 Gbit/s), with a enormous improvement of stability (six hours with no error burst). During day-long transmission, the system behavior has been deeply characterized to correlate any increase of bit error ratio (BER) to the FSO control parameters.
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