Zhong Weihang, Lin Zhongzheng, Wu Lixun, Wu Zituo, Chen Hongjia, Chen Yujie, Yu Siyuan
Opt Lett. 2024 Jun 1;49(11):3006-3009. doi: 10.1364/OL.515916.
In analogy to a wavelength selective switch in wavelength-division multiplexing (WDM) optical fiber communication systems, a spatial and optical mode selective switch (SMSS) would be an important component in future ultrahigh capacity optical fiber communication systems based on space and mode division multiplexing. In this work, a free-space SMSS for orbital angular momentum (OAM) mode-division multiplexing (MDM) is proposed and experimentally demonstrated. The SMSS consists of a separating part for transforming OAM modes to spatial modes and a recombining part for selecting and recombining the modes to any spatial channel. The SMSS is able to implement strictly non-blocking switching between a total of 36 SDM/MDM channels configured as four spatial channels each supporting nine OAM mode channels.
类似于波分复用（WDM）光纤通信系统中的波长选择开关，空间和光模式选择开关（SMSS）将是未来基于空间和模式分复用的超高容量光纤通信系统中的一个重要组件。在这项工作中，提出并通过实验证明了一种用于轨道角动量（OAM）模式分复用（MDM）的自由空间SMSS。该SMSS由一个用于将OAM模式转换为空间模式的分离部分和一个用于将模式选择并重新组合到任何空间通道的重新组合部分组成。该SMSS能够在总共36个SDM/MDM通道之间实现严格的无阻塞切换，这些通道配置为四个空间通道，每个空间通道支持九个OAM模式通道。
