Special Issue "Asymmetric and Symmetric Study in Optics, Photonics and Optoelectronics"

A special issue of Symmetry (ISSN 2073-8994). This special issue belongs to the section "Physics".

Deadline for manuscript submissions: 31 January 2024 | Viewed by 3237

Special Issue Editors

Faculty of Electronic Engineering and Technology, University Malaysia Perlis (UniMAP), Arau, Malaysia
Interests: optical fiber communications; optical CDMA; free space optics (FSO); QKD networks; optics and photonics; information and communication technology; optoelectronics; electronic and communication engineering
Faculty of Electronic Engineering and Technology, University Malaysia Perlis (UniMAP), Arau, Malaysia
Interests: optics; quantum information; electronic design; FPGA; QKD; spectroscopy
Faculty of Science, Department of Physics, Sivas Cumhuriyet University, Sivas, Turkey
Interests: electronic structure of semiconductor structures; electric; magnetic and optical properties of low-dimensional structures; interfaces; thin films; spectroscopy of matter

Special Issue Information

Dear Colleagues,

As an open-access academic journal, Symmetry is peer-reviewed and internationally recognized and ranked. The purpose of this Special Issue is to help document findings and achievements in all fields of optics, photonics, and optoelectronics among academic peers.

Optics, photonics, and optoelectronics are all related, and the development of new technologies like telecommunications, computing, medicine, and energy depends on the progress of all three. Optics is the branch of science that studies light and how it interacts with different kinds of matter. It covers a variety of different topics, such as geometrical optics, physical optics, and quantum optics. Photonics is the branch of science that studies how light is made, how it can be changed, and how it can be found. It includes both the study of optics and the creation of optical technologies that can be used in real life, such as sensing and imaging. Some examples of these uses are in imaging and telecommunications. Optoelectronics is a branch of electronics that looks at how light interacts with different parts of electronics, like semiconductors. It is part of the field of electronics, focusing on ideas such as how to design and make optoelectronic devices, i.e., light-emitting diodes (LEDs) and laser diodes, as well as how to use these devices for things like telecommunications, sensing, and imaging. This Special Issue focuses on recent research contributions, projects, and applications related to symmetry and asymmetry in optics, photonics, and optoelectronics.

Authors are invited to submit manuscripts within the scope of the Special Issue including, but not limited to, the following topics:

  1. Quantum optics: The field of quantum optics is developing quickly, with new advances in quantum communication and quantum computing using light.
  2. Nonlinear optics: Researchers have been able to develop new techniques to control light at the nanoscale, such as by using plasmonic structures and metamaterials. This can enable new applications in imaging, sensing, and energy harvesting.
  3. Optical materials, components, devices, and subsystems.
  4. Optical communications, Optical wireless communications, and Space and underwater optical communications.
  5. Optics in 5G: The advent of 5G networks has prompted a renewed focus on the development of advanced optical technologies for telecommunications, such as beamforming and optical interconnects.

Prof. Dr. Syed Alwee Aljunid
Dr. Norshamsuri Ali
Dr. Fatih Ungan
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Symmetry is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • quantum optics
  • nonlinear optics
  • optical materials
  • optical components
  • optical devices
  • optical subsystems
  • optical communications
  • optical wireless communications
  • underwater optical communications
  • optics in 5G

Published Papers (3 papers)

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Research

Article
Performance Analysis of Coherent Source SAC OCDMA in Free Space Optical Communication Systems
Symmetry 2023, 15(6), 1152; https://doi.org/10.3390/sym15061152 - 26 May 2023
Viewed by 565
Abstract
In this paper, we investigate the performance of spectral amplitude coding optical code division multiple access (SAC OCDMA) systems under the effect of beat noise and turbulence. Three different multi-laser source configurations are considered in this analysis: shared multi-laser, separate multi-laser, and carefully [...] Read more.
In this paper, we investigate the performance of spectral amplitude coding optical code division multiple access (SAC OCDMA) systems under the effect of beat noise and turbulence. Three different multi-laser source configurations are considered in this analysis: shared multi-laser, separate multi-laser, and carefully controlled center frequency separate multi-laser. We demonstrate through Monte Carlo simulation that the gamma–gamma probability density function (pdf) cannot adequately approximate the measured intensity of overlapping lasers and that an empirical pdf is required. Results also show it is possible to achieve error-free transmission at a symmetrical data rate of 10 Gbps for all active users when only beat noise is taken into account by precisely controlling the center frequencies. However, only 30% of the active users can be supported when both beat noise and turbulence are considered. Full article
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Article
Fundamental Asymmetries between Spatial and Temporal Boundaries in Electromagnetics
Symmetry 2023, 15(4), 858; https://doi.org/10.3390/sym15040858 - 04 Apr 2023
Cited by 2 | Viewed by 710
Abstract
Time-varying materials bring an extra degree of design freedom compared to their conventional time-invariant counterparts. However, few discussions have focused on the underlying physical difference between spatial and temporal boundaries. In this letter, we thoroughly investigate those differences from the perspective of conservation [...] Read more.
Time-varying materials bring an extra degree of design freedom compared to their conventional time-invariant counterparts. However, few discussions have focused on the underlying physical difference between spatial and temporal boundaries. In this letter, we thoroughly investigate those differences from the perspective of conservation laws. By doing so, the building blocks of optics and electromagnetics such as the reflection law, Snell’s law, and Fresnel’s equations can be analogously derived in a temporal context, but with completely different interpretations. Furthermore, we study the unique features of temporal boundaries, such as their nonconformance to energy conservation and causality. Full article
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Article
Modeling of Satellite-to-Underwater Integrated FSO-PON System Using NOMA-VLC
Symmetry 2023, 15(3), 739; https://doi.org/10.3390/sym15030739 - 16 Mar 2023
Cited by 1 | Viewed by 1221
Abstract
In recent years, optical wireless communication has promised several benefits over radio frequency communication in atmospheric, deep space and underwater communications. Satellite-to-underwater communication technology can be applied to commercial, naval, scientific and engineering operations because of its high data rate, high security, long-reach [...] Read more.
In recent years, optical wireless communication has promised several benefits over radio frequency communication in atmospheric, deep space and underwater communications. Satellite-to-underwater communication technology can be applied to commercial, naval, scientific and engineering operations because of its high data rate, high security, long-reach and low cost. In this paper, a high-speed, long-reach integrated free space optics (FSO)-passive optical network (PON) system using non-orthogonal multiple access visible light communication (NOMA-VLC) is proposed. It poses a 10/2.5 Gbps per channel bit rate for satellite-to-underwater applications. Numerically calculated results provide the splitter power budget of −35 dBm in the downlink and −32 dBm in the uplink. Additionally, a receiver sensitivity of 23 dB in the downlink and 10 dB in the uplink direction can be obtained in the system using a modified new zero cross-correlation (MNZCC) code under clear environment conditions. Again, the simulative analyses indicate that the suggested system supports 290 underwater devices successfully and offers a high 10 dBm signal-to-noise ratio over 10 km FSO, 100 km fiber and 5 m VLC range. Moreover, it provides a signal-to-noise ratio of 39 dB, with −9 dBm received optical power at 300 fields of view under fiber-wireless channels’ impairments. We argue that the suggested system is a symmetric system adapted to different link distances and which offers improved receiver sensitivity and high received optical power at a 10−9 bit error rate (BER). The comparative analysis shows the advantages of the suggested system over previously reported works. Full article
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