论文标题

与矢量光的多位光学通信的强大基础

A robust basis for multi-bit optical communication with vectorial light

论文作者

Singh, Keshaan, Nape, Isaac, Buono, Wagner Tavares, Dudley, Angela, Forbes, Andrew

论文摘要

提高通信渠道的信息能力是一个紧迫的需求,这是由于不断增长的数据需求以及随之而来的现有调制方案即将发生的数据处理。在这方面,模式分层多路复用(MDM),即光的空间模式形成编码基础,具有巨大的潜力和吸引力,但由于通道不完善而受到模态噪声的阻碍。在这里,我们通过打破将模式本身作为离散基础的现有的MDM范式克服了这一挑战,而是利用矢量光的两极分化不均匀性(向量)作为我们的信息载体。我们表明,该编码基础几乎可以被划分和检测到,并以独立的渠道方式进行测量,这一事实是我们使用大气湍流作为一个高度扰动的通道示例确认实验。我们的方法用一种新型的模态替代方案代替了传统的振幅调制,以增强通道信息的潜在数量级,但即使通过嘈杂的通道也可以褪色,从而提供了新的范式,从而利用空间模式来利用光学通信。

Increasing the information capacity of communication channels is a pressing need, driven by growing data demands and the consequent impending data crunch with existing modulation schemes. In this regard, mode division multiplexing (MDM), where the spatial modes of light form the encoding basis, has enormous potential and appeal, but is impeded by modal noise due to imperfect channels. Here we overcome this challenge by breaking the existing MDM paradigm of using the modes themselves as a discrete basis, instead exploiting the polarization inhomogeneity (vectorness) of vectorial light as our information carrier. We show that this encoding basis can be partitioned and detected almost at will, and measured in a channel independent fashion, a fact we confirm experimentally using atmospheric turbulence as a highly perturbing channel example. Our approach replaces conventional amplitude modulation with a novel modal alternative for potentially orders of magnitude channel information enhancement, yet is robust to fading even through noisy channels, offering a new paradigm to exploiting the spatial mode basis for optical communication.

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