Research Progress on Router Devices for the OAM Optical Communication

Binbin Wang, Xizheng Zhang, Jinlong Tian, Badreddine Merabet, Zhixiang Li, Syed Afaq Ali Shah,Yi Lei,Bingyi Liu,Kai Guo,Zhongyi Guo

SENSORS(2024)

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摘要
Vortex beams carrying orbital angular momentum (OAM) provide a new degree of freedom for light waves in addition to the traditional degrees of freedom, such as intensity, phase, frequency, time, and polarization. Due to the theoretically unlimited orthogonal states, the physical dimension of OAM is capable of addressing the problem of low information capacity. With the advancement of the OAM optical communication technology, OAM router devices (OAM-RDs) have played a key role in significantly improving the flexibility and practicability of communication systems. In this review, major breakthroughs in the OAM-RDs are summarized, and the latest technological standing is examined. Additionally, a detailed account of the recent works published on techniques related to the OAM-RDs has been categorized into five areas: channel multicasting, channel switching, channel filtering, channel hopping, and channel adding/extracting. Meanwhile, the principles, research methods, advantages, and disadvantages are discussed and summarized in depth while analyzing the future development trends and prospects of the OAM-RDs.
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关键词
orbital angular momentum (OAM),OAM router devices (OAM-RDs),channel multicasting,channel switching,channel filtering
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