26 Tbit s-1 line-rate super-channel transmission utilizing all-optical fast Fourier transform processing
26 Tbit s-1 line-rate super-channel transmission utilizing all-optical fast Fourier transform processing
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DOI：
10.1038/nphoton.2011.74
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发表时间：
2011-06-01
期刊：
影响因子：
35
通讯作者：
Leuthold, J.
中科院分区：
文献类型：
--
作者：
Hillerkuss, D.;Schmogrow, R.;Leuthold, J.
每秒太比特（Tbit s(-1)）单通道线路速率的光传输系统似乎不再遥不可及。云计算、三维高清电视和虚拟现实应用等新业务需要前所未有的光通道带宽。然而，这些高容量光通道是由低比特率信号馈送的。接下来的问题是，低比特率的附属信息是否能够有效、节能且毫不费力地从每秒太比特的数据流中编码和提取。我们演示了一种光学快速傅立叶变换方案，该方案提供了必要的计算能力，可以将低比特率的支路编码为10.8和26.0 Tbit s（-1）线率正交频分复用（OFDM）数据流，并从光纤传输的OFDM数据流中解码它们。实验证明了该方法在低能耗下处理每秒太比特数据的可行性和便捷性。据我们所知，这是有史以来在单个光源上编码的最大线率。
Optical transmission systems with terabit per second (Tbit s(-1)) single-channel line rates no longer seem to be too far-fetched. New services such as cloud computing, three-dimensional high-definition television and virtual-reality applications require unprecedented optical channel bandwidths. These high-capacity optical channels, however, are fed from lower-bitrate signals. The question then is whether the lower-bitrate tributary information can viably, energy-efficiently and effortlessly be encoded to and extracted from terabit per second data streams. We demonstrate an optical fast Fourier transform scheme that provides the necessary computing power to encode lower-bitrate tributaries into 10.8 and 26.0 Tbit s(-1) line-rate orthogonal frequency-division multiplexing (OFDM) data streams and to decode them from fibre-transmitted OFDM data streams. Experiments show the feasibility and ease of handling terabit per second data with low energy consumption. To the best of our knowledge, this is the largest line rate ever encoded onto a single light source.