Optical communication beyond orbital angular momentum.
Optical communication beyond orbital angular momentum.
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DOI：
10.1038/srep27674
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发表时间：
2016-06-10
影响因子：
4.6
通讯作者：
Forbes A
中科院分区：
文献类型：
--
作者：
Trichili A;Rosales-Guzmán C;Dudley A;Ndagano B;Ben Salem A;Zghal M;Forbes A
模分多路复用（MDM）被认为是解决未来带宽问题的一种技术，并且已经成功地在自由空间中使用轨道角动量（OAM）的空间模式进行了演示。为了进一步提高数据传输速率，需要更多的自由度来形成密集的模式空间。在这里，我们超越了OAM，并使用径向和方位角自由度演示多路复用和解路复用。我们通过一种全息方法来实现这一点，这种方法允许在一个全息图上以波长无关的方式在宽波长范围内编码超过100种模式。我们的研究结果提供了一种新的工具，将证明有助于实现下一代光网络的更高比特率。
Mode division multiplexing (MDM) is mooted as a technology to address future bandwidth issues, and has been successfully demonstrated in free space using spatial modes with orbital angular momentum (OAM). To further increase the data transmission rate, more degrees of freedom are required to form a densely packed mode space. Here we move beyond OAM and demonstrate multiplexing and demultiplexing using both the radial and azimuthal degrees of freedom. We achieve this with a holographic approach that allows over 100 modes to be encoded on a single hologram, across a wide wavelength range, in a wavelength independent manner. Our results offer a new tool that will prove useful in realizing higher bit rates for next generation optical networks.