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Spatial and Mode Selective Switch for Orbital Angular Momentum Mode Division Multiplexing

Optics Letters
  • Weihang Zhong, Zhongzheng Lin, Lixun Wu, Zituo Wu, HONGJIA CHEN, Yujie Chen, and Siyuan Yu
  • received 12/14/2023; accepted 04/29/2024; posted 04/29/2024; Doc. ID 515916
  • Abstract: In analogy to wavelength selective switch in wavelength division multiplexed (WDM) optical fiber communications systems, a spatial and optical mode selective switch (SMSS) would be an important component in future ultra-high capacity optical fiber communication systems based on space and mode division multiplexing. In this work, an orbital angular momentum (OAM) mode division multiplexing (MDM) device 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 4 spatial channels each supporting 9 OAM mode channels.