1.28 Terabit/s (32x40 Gbit/s) WDM Transmission System for Free Space Optical Communications
1.28 Terabit/s (32x40 Gbit/s) WDM Transmission System for Free Space Optical Communications
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DOI：
10.1109/jsac.2009.091213
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发表时间：
2009-12-01
影响因子：
16.4
通讯作者：
Matsumoto, M.
中科院分区：
文献类型：
--
作者：
Ciaramella, E.;Arimoto, Y.;Matsumoto, M.
我们回顾了一种新的自由空间光学(FSO)系统，它代表了FSO通信领域的重大突破。该系统包括一对新颖的终端：这些终端允许与普通单模光纤进行直接和透明的光学连接，并包括一个专用的电子控制单元，该单元可有效跟踪由于大气湍流和机械振动而导致的信号光束漂移。利用饱和掺铒光纤放大器进一步提高了信号的功率稳定度。这些解决方案允许实现一种新的FSO系统，该系统在意大利比萨两栋建筑之间的双通FSO链路上进行了测试。当终端由普通波分复用信号供电时，它们允许足够的功率预算和余量来支持创纪录的高容量传输(32x40Gbit/S)，并极大地提高了稳定性(6小时无差错突发)。在一天的传输过程中，系统的行为已经被深刻地描述为将误码率(BER)的任何增加与FSO控制参数相关联。
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 (32x40 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.