2021/09/09 by Mujtaba Zahidy, Zahidy, Mujtaba, Yaoxin Liu +11 · 2 citations
Engineering · Physics and Astronomy · #Advanced Photonic Communication Systems #FOS: Physical sciences #Optical Network Technologies #Orbital Angular Momentum in Optics #Quantum Physics (quant-ph)
paper · pdf · doi:10.48550/arxiv.2109.04336
openalex publication_date 2021/09/09 · openalex created_date 2022/07/25 · openalex updated_date 2026/07/28
Light carrying orbital angular momentum constitutes an important resource for\nboth classical and quantum information technologies. Its inherently unbounded\nnature can be exploited to generate high-dimensional quantum states or for\nchannel multiplexing in classical and quantum communication in order to\nsignificantly boost the data capacity and the secret key rate, respectively.\nWhile the big potentials of light owning orbital angular momentum have been\nwidely ascertained, its technological deployment is still limited by the\ndifficulties deriving from the fabrication of integrated and scalable photonic\ndevices able to generate and manipulate it. Here, we present a photonic\nintegrated chip able to excite orbital angular momentum modes in an 800 m long\nring-core fiber, allowing us to perform parallel quantum key distribution using\n2 and 3 different modes simultaneously. The experiment sets the first steps\ntowards quantum orbital angular momentum division multiplexing enabled by a\ncompact and light-weight silicon chip, and further pushes the development of\nintegrated scalable devices supporting orbital angular momentum modes.\n