Intensity-Domain Demultiplexing of Orbital Angular Momentum Channels for Optical Communication

@misc{kim2026intensitydomain,
  title = {{Intensity-Domain Demultiplexing of Orbital Angular Momentum Channels for Optical Communication}},
  author = {Junsu Kim and Jiwon Jung and Hyunchae Chun and Seung Ryong Park},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.41259},
  eprint = {2610.41259},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.41259},
  note = {CC BY 4.0},
}

TY  - UNPB
TI  - Intensity-Domain Demultiplexing of Orbital Angular Momentum Channels for Optical Communication
AU  - Junsu Kim
AU  - Jiwon Jung
AU  - Hyunchae Chun
AU  - Seung Ryong Park
PY  - 2026
DA  - 2026/10/30
PB  - arXiv
DO  - 10.48550/arxiv.2610.41259
UR  - https://arxiv.org/abs/2610.41259
AB  - Orbital angular momentum (OAM) multiplexing has been limited in practice by the complexity and optical loss of the elements that separate the channels at the receiver side. Here we adopt the azimuthal harmonics of OAM petal patterns as the demultiplexing basis, which makes the receiver the optical counterpart of the circular antenna arrays used in radio OAM links: the petal pattern of topological charge ℓ carries a single azimuthal harmonic of order 2ℓ, so one Fourier transform of the azimuthal intensity profile returns every channel, without gratings or mode sorters. The petals are formed by projecting a vector vortex beam from a single q-plate onto a linear polarization. A two-channel system at 515 nm with a 16-position circular photoreceiver array reaches 5.2 Gb/s below the forward error correction threshold, 2.6 Gb/s per channel from a 1.4 GHz photoreceiver.
ER  -