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Entanglement is a vital resource for realizing many tasks such as teleportation, secure key distribution, metrology and quantum computations. To effectively build entanglement between different quantum systems and share information between…

As an attractive degree of freedom in electromagnetic (EM) waves, the orbital angular momentum (OAM) enables infinite communication channels for both classical and quantum communications. The exploration of OAM generation inspires various…

Optics · Physics 2018-08-21 Menglin L. N. Chen , Li Jun Jiang , Wei E. I. Sha

A data center (DC) is one of the main building blocks of modern information technology. Any intra DC network should strive to achieve high throughput, while continuing to be flexible in responding to changing traffic patterns. Optical…

Instrumentation and Detectors · Physics 2017-02-16 Judy Kupferman , Shlomi Arnon

Comb-based optical arbitrary waveform measurement (OAWM) techniques can overcome the bandwidth limitations of conventional coherent detection schemes and may have disruptive impact on a wide range of scientific and industrial applications.…

Signal Processing · Electrical Eng. & Systems 2023-10-30 Daniel Drayss , Dengyang Fang , Christoph Füllner , Wolfgang Freude , Sebastian Randel , Christian Koos

Orbital angular momentum (OAM) has gained great interest due to its most attractive feature of high dimensionality, and several ground-breaking demonstrations in communication based on OAM multiplexing have been carried out. Accordingly, a…

Optics · Physics 2016-02-22 Zhihan Zhu , Wei Gao , Chunyuan Mu , Hongwei Li

Orbital angular momentum (OAM), due to its theoretically orthogonal and unbounded helical phase index, has been utilized as an independent physical degree of freedom for ultrahigh-capacity information encryption. However, the imaging…

Optics · Physics 2024-07-29 Feiyang Shen , Weiwen Fan , Yong Zhang , Yuping Chen , Xianfeng Chen

Mode division multiplexing (MDM) is mooted as a technology to address future bandwidth issues, and has been successfully demonstrated in free space using spatial modes with orbital angular momentum (OAM). To further increase the data…

Orbital angular momentum (OAM) multiplexing provides an efficient method to improve data-carrying capacity in various quantum communication protocols. It is a precondition to distribute OAM multiplexed quantum resources in quantum channels…

Quantum Physics · Physics 2022-03-31 Li Zeng , Rong Ma , Hong Wen , Meihong Wang , Jun Liu , Zhongzhong Qin , Xiaolong Su

Structured light beams, in particular those carrying orbital angular momentum (OAM), have gained a lot of attention due to their potential for enlarging the transmission capabilities of communication systems. However, the use of…

Radio frequency-orbital angular momentum (RF-OAM) is a novel approach of multiplexing a set of orthogonal modes on the same frequency channel to achieve high spectrum efficiencies. Since OAM requires precise alignment of the transmit and…

Information Theory · Computer Science 2022-08-08 Rui Chen , Zhenyang Tian , Wen-Xuan Long , Xiaodong Wang , Wei Zhang

High power orbital-angular-momentum (OAM) beam has dominant advantages in capacity increasing and data receiving for free-space optical communication systems at long distance. Utilizing coherent combination of beam array technique and…

Optics · Physics 2017-11-07 Dong Zhi , Yanxing Ma , Pu Zhou , Rumao Tao , Xiaolin Wang , Lei Si , Zejin Liu

The orbital angular momentum (OAM) of photons is a promising degree of freedom for high-dimensional quantum key distribution (QKD). However, effectively mitigating the adverse effects of atmospheric turbulence is a persistent challenge in…

Signal Processing · Electrical Eng. & Systems 2020-06-24 Jiapeng Zhao , Yiyu Zhou , Boris Braverman , Cong Liu , Kai Pang , Nicholas K. Steinhoff , Glenn A. Tyler , Alan E. Willner , Robert W. Boyd

Light carrying orbital angular momentum (OAM) has been shown to be of use in a disparate range of fields ranging from astronomy to optical trapping, and as a promising new dimension for multiplexing signals in optical communications and…

Optics · Physics 2017-04-07 Shibiao Wei , Stuart K. Earl , Xiao-Cong Yuan , Shan Shan Kou , Jiao Lin

Orbital angular momentum (OAM) at radio frequency (RF) provides a novel approach of multiplexing a set of orthogonal modes on the same frequency channel to achieve high spectral efficiencies (SEs). However, the existing research on OAM…

Information Theory · Computer Science 2021-10-19 Wen-Xuan Long , Rui Chen , Marco Moretti , Jian Xiong , Jiandong Li

The high-dimensional basis of orbital angular momentum (OAM) has several added and unique advantages for photonics quantum technologies compared to the polarization basis, which is only two-dimensional. However, one of the major roadblocks…

Quantum Physics · Physics 2025-02-21 Suman Karan , Martin P. Van Exter , Anand K. Jha

The vortex electromagnetic wave carried by multiple orthogonal orbital angular momentum (OAM) modes in the same frequency band can be applied to the field of wireless communications, which greatly increases the spectrum efficiency. The…

Signal Processing · Electrical Eng. & Systems 2024-06-11 Hongyun Jin , Wenchi Cheng , Haiyue Jing , Jingqing Wang

Orbital angular momentum (OAM) technology enhances the spectrum and energy efficiency of wireless communications by enabling multiplexing over different OAM modes. However, classical information theory, which relies on scalar models and…

Signal Processing · Electrical Eng. & Systems 2024-12-17 Runyu Lyu , Wenchi Cheng , Qinghe Du , Tony Q. S. Quek

Orbital angular momentum (OAM) has attracted much attention for radio vortex wireless communications due to the orthogonality among different OAM-modes. To maintain the orthogonality among different OAM modes at the receiver, the strict…

Signal Processing · Electrical Eng. & Systems 2024-08-15 Wenchi Cheng , Haiyue Jing , Wei Zhang , Zan Li , Hailin Zhang

Orbital angular momentum (OAM) modes have emerged as a promising solution for enhancing the capacity of optical multiplexing systems, leveraging their theoretically unbounded set of orthogonal spatial modes. However, the generation and…

A light beam carrying orbital angular momentum (OAM) is characterized by a helical phase-front that winds around the center of the beam. These beams have unique properties that have found numerous applications. In the field of data…

Optics · Physics 2023-10-13 Julian Schulz , Georg von Freymann