RPG Seminar – Analysis of Electromagnetic Vortex Wave Based on Modified Dynamic Mode Decomposition
31 Mar, 2021 (Wed)
2:00 pm
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Mr. Yanming Zhang
Department of Electrical and Electronic Engineering
The University of Hong Kong


The orbital angular momentum (OAM) modes of electromagnetic (EM) beams are utilized for multiplexing in communication systems, where each OAM mode is encoded with data. The OAM index, or the so called topological charge, identifies each OAM mode. Recently, the amplitude of OAM mode has also been used as another modulation format. Therefore, accurate extraction of not only the OAM index but also the corresponding amplitude is required. In this paper, a modified dynamic mode decomposition (DMD) algorithm is proposed to analyze the OAM modes. We show that accurate topological charges and high-resolution amplitude patterns of both single OAM mode and composite OAM modes can be obtained. This work offers an effective approach for demultiplexing OAM-carrying beams, especially when the high-resolution amplitude information is needed.

Biography of the speaker:
Yanming Zhang is working toward the Ph.D. degree with the Department of EEE, The University of Hong Kong, Hong Kong. His current research interests include computational electromagnetics and data-driven methods.


Dr. Lijun Jiang

Most seminars are open to the general public, free of charge, unless otherwise stated. Registration is not required. Arrangement for car parking facilities on campus please contact us for details.

For enquiries, please contact:
Department of Electrical and Electronic Engineering,
Room 601, Chow Yei Ching Building,
Pokfulam Road, Hong Kong
Tel: (852) 3917 7093
Email: seminar@eee.hku.hk