Article
Multidisciplinary Sciences
Zelin Ma, Poul Kristensen, Siddharth Ramachandran
Summary: Spatial mode-count scalability in optical fibers is severely limited by perturbative mode mixing. We propose an alternative means of light guidance using light's orbital angular momentum to create a centrifugal barrier. This distinctive light-guidance regime enables low-loss transmission of light, substantially increasing the information content per photon for quantum or classical networks.
Article
Optics
[Anonymous]
Summary: A new quantitative method is proposed in this paper for determining the single state number of the beam carrying Orbital Angular Momentum (OAM) based on analysis of the S21 system parameter. The experiment was conducted on a computer model, simulating beams with different state numbers and utilizing software products CST Studio for parameter determination and Matlab for visualization of beams with different OAM states.
Article
Optics
Xiaodong Wu, Hailin Cao, Junhui Peng, Zhenya Meng
Summary: This study proposes a solution for addressing bandwidth, orbital-angular momentum divergence, and mode purity issues in the terahertz domain, and compares the performance of different lattice types, with concentric ring lattice demonstrating the best performance.
Article
Optics
Peng Xu, Kunyi Zhang, Haixia Liu, Ruijie Li, Long Li
Summary: This paper proposes a dual-band metasurface that generates multiple orbital angular momentum beams independently in full polarizations. The metasurface can be used in various applications such as wireless communication, target detection, and security encryption.
Article
Optics
Henry F. Elder, Phillip Sprangle
Summary: This article analyzes the effects of atmospheric turbulence on the mode power spectrum of beams carrying orbital angular momentum represented by Laguerre-Gauss (LG) modes. The analysis is validated against simulations and shows consistent results, which have important implications for the design and characterization of free-space laser communication systems.
Article
Optics
Kai Pang, Kaiheng Zou, Hao Song, Zhe Zhao, Amir Minoofar, Runzhou Zhang, Haoqian Song, Huibin Zhou, Xinzhou Su, Cong Liu, Nanzhe Hu, Moshe Tur, Alan E. Willner
Summary: By coherently combining multiple frequencies, near-diffraction-free and near-dispersion-free OAM pulses with arbitrary group velocities have been generated. It has been found that both positive and negative group velocities can be achieved and continuously controlled, and that the simulated value of group velocity remains the same when the topological charge l is varied. However, as the l value increases, the pulse duration becomes longer for a given number of frequency lines.
Article
Optics
P. A. Ameen Yasir, C. M. Chandrashekar
Summary: The researchers propose a method to achieve hyperentanglement in the different degrees of freedom of a photon (polarization, OAM, path) using an optical setup. By mapping the photon's degrees of freedom to two dimensions, they generate hyperentangled states. The amount of hyperentanglement is quantified by measuring the entanglement negativity.
Article
Optics
Peng Xu, Ruijie Li, Haixia Liu, Kunyi Zhang, Xin Wang, Long Li
Summary: This paper achieves the simultaneous and independent generation of multiple linear polarized vortex beams in different directions by elaborately splicing multiple transmissive metasurfaces with polarization isolation. The proposed method demonstrates effective control and isolation of polarization for generating desired vortex beams.
Article
Optics
Chun-Hua Xue, Huachen Zhao, Teng LI, Xi Gao
Summary: An ultrathin Huygens' metasurface is designed to generate an orbital angular momentum (OAM) beam. The metasurface achieves near-complete transmission phase shift around 28 GHz based on induced magnetism. Experimental results show that dual-polarized OAM transmitted waves with mode l = 1 can be efficiently generated on a double-layered Huygens' metasurface around 28 GHz, with high gain, narrow divergence angle, and low assembly cost.
Article
Optics
Hongbin Yang, Qingze Yan, Yixin Zhang, Lifa Hu
Summary: In this study, the effects of absorbent and weak turbulent seawater channels on the orbital angular momentum (OAM) mode carried by perfect optical vortex (POV) were investigated. Results show that the receiving probability of OAM modes decreases linearly with the increase of virtual refractive index of the water body. A high receiving probability underwater communication link can be achieved by using long signal wavelength, low OAM quantum number, and a POV with a larger ring radius.
News Item
Optics
Philippe St-Jean
Summary: This paper presents a novel solid-state laser that can generate a large array of phase-locked optical vortices with tunable orbital angular momentum.
News Item
Optics
Spencer W. Jolly
Summary: A diffractive axicon can create intricate connections between topological charges and frequencies of ultrashort laser pulses, resulting in a diverse range of coiled light structures.
Article
Optics
Jing Wang, Xinyu Nie, Yinlong Guo, Yaru Liang, Jinhong Li
Summary: In this paper, based on the cross-spectral density function, the coherence-orbital angular momentum (COAM) matrix of twisted Gaussian Schell-model (TGSM) beam is proposed and analyzed. The simulation results indicate that the COAM matrix characteristics of TGSM beam depend on the initial parameters. Furthermore, a method of generating TGSM beam by superposition of COAM matrix element modes is described and the influence of different parameters on the superposition characteristics is studied.
Article
Optics
Yue Liu, Chengxin Zhou, Kuangling Guo, Zhongchao Wei, Hongzhan Liu
Summary: This study successfully controls multi-channel PV beams and constructs perfect vector vortex beams using all-dielectric transmission metasurfaces with superimposed phase profiles. It provides a new perspective on generating tailored PV beams, increasing design flexibility, and facilitating the construction of compact, integrated, and versatile nanophotonics platforms.
Article
Optics
Shunyuan Shang, Xinyu LI, Wei Deng, Youran Wang, Yiming Han, Huajun Yang, Ping Jiang
Summary: This article derives the expression of efficiency for Bessel-Gauss beams coupling into parabolic fibers through a Cassegrain antenna system and considers the effects of atmospheric turbulence and random jitter of the coupling lens to improve the practical applicability of the model. The research provides a theoretical basis for the study of vortex beams and optical communication, and has instructive meaning for practical engineering design.
Article
Engineering, Electrical & Electronic
Yangxurui Liu, Liang Liu, Ove Edfors, Viktor Owall
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
(2019)
Article
Engineering, Electrical & Electronic
Mojtaba Mandavi, Ove Edfors, Viktor Owall, Liang Liu
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
(2019)
Article
Computer Science, Information Systems
Muris Sarajlic, Fredrik Rusek, Jesus Rodriguez Sanchez, Liang Liu, Ove Edfors
IEEE WIRELESS COMMUNICATIONS LETTERS
(2019)
Article
Engineering, Electrical & Electronic
Erik L. Bengtsson, Fredrik Rusek, Peter C. Karlsson, Fredrik Tufvesson, Ove Edfors
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2020)
Article
Engineering, Electrical & Electronic
Jose Flordelis, Xuhong Li, Ove Edfors, Fredrik Tufvesson
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
(2020)
Article
Computer Science, Information Systems
Erik L. Bengtsson, Jose Flordelis, Fredrik Rusek, Peter C. Karlsson, Fredrik Tufvesson, Ove Edfors
IEEE WIRELESS COMMUNICATIONS LETTERS
(2020)
Article
Engineering, Electrical & Electronic
Mojtaba Mahdavi, Ove Edfors, Viktor Owall, Liang Liu
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
(2020)
Article
Engineering, Electrical & Electronic
Mojtaba Mahdavi, Stefan Weithoffer, Matthias Herrmann, Liang Liu, Ove Edfors, Norbert Wehn, Michael Lentmaier
Summary: This paper conducts a comprehensive design space exploration of spatially coupled serially concatenated codes (SC-SCCs), investigating different aspects such as block length, coupling memory, decoding window size, and number of iterations. It proposes two decoding algorithms, block-wise and window-wise decoders, and explores their performance in terms of throughput, silicon area, latency, and decoding performance.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
(2022)
Article
Engineering, Electrical & Electronic
Minkeun Chung, Liang Liu, Ove Edfors
Summary: In this paper, a new framework for low-complexity PN compensation is proposed, which includes a pilot allocation strategy to minimize the overhead. The method achieves a significant reduction in complexity by exploiting the coherence bandwidth of mmWave systems and approximating the actual PN spectrum.
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Jesus Rodriguez Sanchez, Fredrik Rusek, Ove Edfors, Liang Liu
Summary: The Large Intelligent Surface (LIS) is a promising technology in wireless communication, remote sensing, and positioning. This paper addresses the challenges in implementing LIS and proposes solutions using hierarchical architectures and distributed processing techniques. The performance and trade-offs of a discrete LIS are also analyzed to provide guidelines for efficient implementation.
IEEE TRANSACTIONS ON SIGNAL PROCESSING
(2022)
Article
Engineering, Electrical & Electronic
Juan Vidal Alegria, Fredrik Rusek, Ove Edfors
Summary: Current research on multi-antenna architectures focuses on increasing the number of antennas in base stations to improve spectral efficiency. Decentralized architectures can reduce computational complexity compared to centralized architectures, but come with increased complexity and interconnection bandwidth costs at the antenna end.
IEEE TRANSACTIONS ON SIGNAL PROCESSING
(2021)
Article
Engineering, Electrical & Electronic
Muris Sarajlic, Ashkan Sheikhi, Liang Liu, Henrik Sjoland, Ove Edfors
Summary: This paper combines circuit theory and communication theory to derive theoretical expressions linking analog front-end power consumption with system design and environment parameters. The obtained scaling laws show the relationship between AFE power consumption and bandwidth, SNDR, SIR, as well as other important communication system parameters. These results can be used to determine system design strategies for low-power applications.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
(2021)
Article
Telecommunications
Nafiseh Mazloum, Ove Edfors
IEEE TRANSACTIONS ON GREEN COMMUNICATIONS AND NETWORKING
(2020)
Article
Engineering, Electrical & Electronic
Jesus Rodriguez Sanchez, Fredrik Rusek, Ove Edfors, Muris Sarajlic, Liang Liu
IEEE TRANSACTIONS ON SIGNAL PROCESSING
(2020)
Proceedings Paper
Engineering, Electrical & Electronic
Steffen Malkowsky, Hemanth Prabhu, Liang Liu, Ove Edfors, Viktor Owall
2019 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS (ISCAS)
(2019)
