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Applied Sciences
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Photonic Switching
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Photonic Switching

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Optics and Lasers".

Deadline for manuscript submissions: closed (15 March 2020) | Viewed by 10222

Special Issue Editors

Prof. Dr. Nikos Pleros

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Guest Editor
Department of Informatics Thessaloniki, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
Interests: optical interconnects; optical RAM and optical buffering; optical access and radio-over-fiber networks; optical signal processing for data routing and switching; biophotonics
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Konstantinos Vyrsokinos

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Guest Editor
Physics Department, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
Interests: optical interconnects; Si photonics; optical switching and buffering

Special Issue Information

Dear Colleagues,

With the advent of photonic integration and the emerging architectural transformations that take place in several network segments, photonic switching has been gaining increased interest trying to identify the sweet spot where significant energy and performance benefits can be offered without, however, necessitating major changes in the overlying protocol stack. Photonic switch-based technologies and architectures appear as appealing candidates for a range of network sectors, starting from DataCenter environments in view of the intended resource disaggregation; proceeding through 5G network fronthauling, where ultra-low low-latency switching is targeted; to long-haul communications, where wavelength selective switches have been already established among the main technology vehicles. In all these network environments, photonic integration plays a major role in enabling on-chip photonic switch engines with low-energy and low-footprint capabilities. To this end, this Special Issue aims to consolidate the latest research in photonic switching along all possible network segments, reporting on the main advances on architectures and enabling switch technologies, including, of course, integrated switches.  

Prof. Dr. Nikos Pleros
Prof. Dr. Konstantinos Vyrsokinos
Guest Editors

Manuscript Submission Information

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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. Applied Sciences is an international peer-reviewed open access semimonthly 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

  • Photonic switching for data centers
  • Photonic switching for computing
  • Photonic switching for 5G networks
  • Wavelength selective switches
  • Integrated photonic switches
  • Novel switch architectures for both packet- and circuit-switching
  • Low-latency and high-bandwidth photonic switch fabrics
  • Photonic switch technologies
  • Low-energy photonic switching
  • Machine-learning-aided photonic switching
  • Software-controlled photonic switch fabrics.

Published Papers (4 papers)

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Research

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13 pages, 2913 KiB  
Article
Active Switching of Extremely High-Q Fano Resonances Using Vanadium Oxide-Implanted Terahertz Metamaterials
by Jing Ma, Zhi-Hang Wang, Huan Liu, Ya-Xian Fan and Zhi-Yong Tao
Appl. Sci. 2020, 10(1), 330; https://doi.org/10.3390/app10010330 - 02 Jan 2020
Cited by 7 | Viewed by 2956
Abstract
In this paper, we demonstrate an active switching of extremely high Q-factor Fano resonances using vanadium oxide (VO2)-implanted THz asymmetric double C-shaped metamaterial (MM) structures. The simulation results indicate the highly temperature-sensitive nature of the double Fano resonances that can be [...] Read more.
In this paper, we demonstrate an active switching of extremely high Q-factor Fano resonances using vanadium oxide (VO2)-implanted THz asymmetric double C-shaped metamaterial (MM) structures. The simulation results indicate the highly temperature-sensitive nature of the double Fano resonances that can be switched at very low external thermal pumping (68 °C), which is only slightly higher than room temperature. We employ the surface current and electric field distributions of the structure to analyze the physical mechanism of the observed switching behavior in the thermally excited Fano MMs. More importantly, by optimizing the asymmetric parameter (offset length), the linewidth of the Fano resonance can reach only 0.015 THz and the Q-factor is as high as 98, which is one order of magnitude higher than that of the traditional MMs. The findings of this work would enable a thermally-induced high-Q Fano resonance MMs for ultra-sensitive sensors, modulators, low threshold switching in metadevices. Full article
(This article belongs to the Special Issue Photonic Switching)
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8 pages, 2520 KiB  
Article
A Deeply Saturated Differentially-Biased SOA-MZI for 20 Gb/s Burst-Mode NRZ Traffic
by Apostolos Tsakyridis, Miltiadis Moralis-Pegios, Christos Vagionas, Eugenio Ruggeri, George Kalfas, Amalia Miliou and Nikos Pleros
Appl. Sci. 2019, 9(15), 2971; https://doi.org/10.3390/app9152971 - 25 Jul 2019
Viewed by 2449
Abstract
We experimentally demonstrate an optical Burst-Mode Wavelength Converter (BMWC) that simultaneously provides power equalization and wavelength conversion of Non-Return to Zero-On/Off Keying (NRZ-OOK) data and operates up to 20 Gb/s. It employs a balanced, differentially-biased, Semiconductor Optical Amplifier-Mach Zehnder Interferometer (SOA-MZI) operating in [...] Read more.
We experimentally demonstrate an optical Burst-Mode Wavelength Converter (BMWC) that simultaneously provides power equalization and wavelength conversion of Non-Return to Zero-On/Off Keying (NRZ-OOK) data and operates up to 20 Gb/s. It employs a balanced, differentially-biased, Semiconductor Optical Amplifier-Mach Zehnder Interferometer (SOA-MZI) operating in deeply saturated regime and its performance is evaluated at 10 Gb/s and 20 Gb/s with loud/soft peak–power ratios up to 9 dB and 5 dB, respectively. Bit Error Rate (BER) measurements reveal error free operation with up to 6.1 dB BER improvement at 10 Gb/s and 3.51 dB at 20 Gb/s, while the use of a single SOA-MZI yields 50% reduction in the number of active components against state-of-the-art BMWCs. Finally, the proposed BMWC is evaluated in non-dispersion compensated 25 km fiber transmission experiment, providing error-free operation with 1.43 dB BER improvement, validating its capabilities for potential employment in Passive Optical Networks (PON) and 5G fronthaul networks. Full article
(This article belongs to the Special Issue Photonic Switching)
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12 pages, 5508 KiB  
Article
Packet Switching Strategy and Node Architecture of Extended Spectral-Amplitude-Coding Labels in GMPLS Networks
by Kai-Sheng Chen
Appl. Sci. 2019, 9(7), 1513; https://doi.org/10.3390/app9071513 - 11 Apr 2019
Cited by 4 | Viewed by 2954
Abstract
We present packet switching applications based on extended spectral-amplitude-coding (SAC) labels in generalized multi-protocol label switching (GMPLS) networks. The proposed approach combines the advantages of wavelength-division multiplexing (WDM) and optical code-division multiple access (OCDMA). The extended SAC labels preserve the orthogonal property to [...] Read more.
We present packet switching applications based on extended spectral-amplitude-coding (SAC) labels in generalized multi-protocol label switching (GMPLS) networks. The proposed approach combines the advantages of wavelength-division multiplexing (WDM) and optical code-division multiple access (OCDMA). The extended SAC labels preserve the orthogonal property to avoid the effect of multiple access interference (MAI) shown at the decoder. We investigate the node architecture of label generation/recognition based on arrayed waveguide grating (AWG). Combining cyclic-shifted maximal length sequence (MLS) codes with the wavelength routed property of AWG simplifies the node structure. The simulation results show that the proposed labels achieve good performances against receiver noise due to the low average cross-correlation values. Under a given bit-error-rate (BER), the switching efficiency of the extended SAC labels outperforms the previous OCDMA schemes, as the network nodes are capable of processing a large number of labels simultaneously. Full article
(This article belongs to the Special Issue Photonic Switching)
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Other

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9 pages, 973 KiB  
Letter
Rearrangeable and Repackable S-W-S Elastic Optical Networks for Connections with Limited Bandwidths
by Bey-Chi Lin
Appl. Sci. 2020, 10(4), 1251; https://doi.org/10.3390/app10041251 - 13 Feb 2020
Cited by 4 | Viewed by 1407
Abstract
Elastic optical networks flexibly allocate bandwidth to a connection for improving utilization efficiency. The paper considers an optical node architecture that is similar to a three-stage Clos network for elastic optical networks. The architecture, which employs space switching in the first and the [...] Read more.
Elastic optical networks flexibly allocate bandwidth to a connection for improving utilization efficiency. The paper considers an optical node architecture that is similar to a three-stage Clos network for elastic optical networks. The architecture, which employs space switching in the first and the third stages and wavelength switching in the second stage, is called an S-W-S switching fabric. In this paper, we propose a graph-theoretic approach and different routing algorithms to derive the sufficient conditions under which an S-W-S switching fabric will be rearrangeable nonblocking and repackable nonblocking. The proposed rearrangeable and repackable nonblocking S-W-S switching fabrics for connections with limited bandwidths consume around half the number of middle wavelength switches compared to strictly nonblocking S-W-S switching fabrics. Full article
(This article belongs to the Special Issue Photonic Switching)
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