The hybrid multiplexing technique reactivates optical interconnect as it offers multiple dimensions to dramatically enhance the data capacity of a single wavelength carrier. A straightforward method to realize hybrid multiplexing is to perform polarization multiplexing for mode-multiplexed signals, by utilizing a mode-transparent polarization beam splitter (MTPBS), which can process multiple modes simultaneously. However, present PBSs mainly work in the single-mode regime, and it is not easy to redesign the conventional PBS to accommodate multiple modes, due to the severe mode dispersion. Here, a novel MTPBS, which can tackle a group of modes simultaneously, is proposed and demonstrated. As a demonstration, the MTPBS supporting a total channel number of 13 is experimentally achieved, with low insertion loss and low modal/polarization cross talk. This work provides a new insight to realize hybrid multiplexing and represents a solution for high-density and large-capacity photonic integration.

中文翻译：

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支持 13 个数据通道的集成模式透明偏振分束器

混合复用技术重新激活了光互连，因为它提供了多个维度以显着提高单个波长载波的数据容量。实现混合复用的一种直接方法是利用可同时处理多种模式的模式透明偏振分束器 (MTPBS) 对模式复用信号进行偏振复用。然而，目前的 PBS 主要工作在单模状态，并且由于严重的模式色散，很难重新设计传统的 PBS 以适应多种模式。在这里，提出并演示了一种可以同时处理一组模式的新型 MTPBS。作为演示，通过实验实现了支持总通道数为 13 的 MTPBS，具有低插入损耗和低模态/极化串扰。