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Photonics
Special Issues
Optical Networking Technologies for High-Speed Data Transmission
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Optical Networking Technologies for High-Speed Data Transmission

A special issue of Photonics (ISSN 2304-6732). This special issue belongs to the section "Data-Science Based Techniques in Photonics".

Deadline for manuscript submissions: 31 July 2025 | Viewed by 2150

Special Issue Editors

Dr. Yixiao Zhu

E-Mail Website
Guest Editor
State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, Shanghai 200240, China
Interests: optical communications; short-reach optical interconnects; fronthaul
Special Issues, Collections and Topics in MDPI journals
Dr. Xiansong Fang

E-Mail Website
Guest Editor
School of Electronics, Peking University, Beijing 100871, China
Interests: optical communications; data-center interconnects; long-haul transmission

Special Issue Information

Dear Colleagues,

The emerging artificial intelligence-generated content (AIGC) has become popular worldwide, leading to explosive Internet traffic in various optical networks, from short-reach data-center interconnects to long-haul optical transmission. Optical transmission plays a more important role in underpinning the modern information society thanks to its wideband, low loss, and scalable features. In data centers, the ethernet interface is evolving from 800G to 1.6T. In passive optical networks, the data rate is going beyond 200G with flexible adjustment ability. For long-haul transmission, 800G/1.6T is expected with extensions beyond the current C+L band. To achieve these goals, physical layer constraints, such as transceiver bandwidth limitation, cascaded wavelength-selective switch filtering, fiber nonlinearity, stimulated Raman scattering, etc., should be well examined and compensated.

This Special Issue will explore the latest advances in optical networking technologies for high-speed data transmission. In this Special Issue, both original research articles and reviews are welcome. This Special Issue will also report investigations into theoretical and practical challenges to encourage joint efforts from academia and industry. The topics of interest include, but are not limited to, the following:

  • High-speed transmission in on-chip optical networks;
  • High-speed transmission in on-board optical networks;
  • High-speed transmission in data-center optical networks;
  • High-speed transmission in passive optical networks;
  • High-speed transmission in fiber-wireless networks;
  • High-speed transmission in metro optical networks;
  • High-speed transmission in long-haul networks;
  • High-speed transmission in optical switching networks;
  • High-speed transmission in free-space optical networks.

We look forward to receiving your contributions.

Dr. Yixiao Zhu
Dr. Xiansong Fang
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. Photonics 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

  • optical communications
  • optical networking
  • digital signal processing
  • data-center interconnects
  • passive optical network
  • fronthaul
  • long-haul transmission

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Published Papers (3 papers)

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Research

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13 pages, 3649 KiB  
Article
Real-Time Unrepeated Long-Span Field Trial over Deployed 4-Core Fiber Cable Using Commercial 130-Gbaud PCS-16QAM 800 Gb/s OTN Transceivers
by Jian Cui, Chao Wu, Zhuo Liu, Yu Deng, Bin Hao, Leimin Zhang, Ting Zhang, Yuxiao Wang, Bin Wu, Chengxing Zhang, Jiabin Wang, Baoluo Yan, Li Zhang, Yong Chen, Xuechuan Chen, Hu Shi, Lei Shen, Lei Zhang, Jie Luo, Yan Sun, Qi Wan, Cheng Chang, Bing Yan and Ninglun Guadd Show full author list remove Hide full author list
Photonics 2025, 12(4), 319; https://doi.org/10.3390/photonics12040319 - 29 Mar 2025
Viewed by 218
Abstract
The space-division multiplexed (SDM) transmission technique based on uncoupled multi-core fibers (MCF) shows great implementation potential due to its huge transmission capacity and compatibility with existing transceivers. In this paper, we demonstrate a real-time single-span 106 km field trial over deployed 4-core MCF [...] Read more.
The space-division multiplexed (SDM) transmission technique based on uncoupled multi-core fibers (MCF) shows great implementation potential due to its huge transmission capacity and compatibility with existing transceivers. In this paper, we demonstrate a real-time single-span 106 km field trial over deployed 4-core MCF cable using commercial 800 Gb/s optical transport network (OTN) transceivers. The transceivers achieved a modulation rate of 130 Gbaud with the optoelectronic multiple-chip module (OE-MCM) packaging technique, which enabled the adoption of a highly noise-tolerant probability constellation shaping a 16-array quadrature amplitude modulation (PCS-16QAM) modulation format for 800 Gb/s OTN transceivers, and could realize unrepeated long-span transmission. The 4-core 800 Gb/s transmission systems achieved a real-time transmission capacity of 256 Tb/s with fully loaded 80-wavelength channels over the C+L band. The performance of different kinds of 800 G OTN transceivers with different modulation formats under this long-span unrepeated optical transmission system is also estimated and discussed. This field trial demonstrates the feasibility of applying uncoupled MCF with 800 Gb/s OTN transceivers in unrepeated long-span transmission scenarios and promotes its field implementation in next-generation high-speed optical interconnection systems. Full article
(This article belongs to the Special Issue Optical Networking Technologies for High-Speed Data Transmission)
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13 pages, 3864 KiB  
Article
First Real-Time 221.9 Pb/S∙Km Transmission Capability Demonstration Using Commercial 138-Gbaud 400 Gb/S Backbone OTN System over Field-Deployed Seven-Core Fiber Cable with Multiple Fusion Splicing
by Jian Cui, Yu Deng, Zhuo Liu, Yuxiao Wang, Chen Qiu, Zhi Li, Chao Wu, Bin Hao, Leimin Zhang, Ting Zhang, Bin Wu, Chengxing Zhang, Weiguang Wang, Yong Chen, Kang Li, Feng Gao, Lei Shen, Lei Zhang, Jie Luo, Yan Sun, Qi Wan, Cheng Chang, Bing Yan and Ninglun Guadd Show full author list remove Hide full author list
Photonics 2025, 12(3), 269; https://doi.org/10.3390/photonics12030269 - 14 Mar 2025
Viewed by 425
Abstract
The core-division-multiplexed (CDM) transmission technique utilizing uncoupled multi-core fiber (MCF) is considered a promising candidate for next-generation long-haul optical transport networks (OTNs) due to its high-capacity potential. For the field implementation of MCF, it is of great significance to explore its long-haul transmission [...] Read more.
The core-division-multiplexed (CDM) transmission technique utilizing uncoupled multi-core fiber (MCF) is considered a promising candidate for next-generation long-haul optical transport networks (OTNs) due to its high-capacity potential. For the field implementation of MCF, it is of great significance to explore its long-haul transmission capability using high-speed OTN transceivers over deployed MCF cable. In this paper, we investigate the real-time long-haul transmission capability of a deployed seven-core MCF cable using commercial 138-Gbaud 400 Gb/s backbone OTN transceivers with a dual-polarization quadrature phase shift keying (DP-QPSK) modulation format. Thanks to the highly noise-tolerant DP-QPSK modulation format enabled by the high baud rate, a real-time 256 Tb/s transmission over a 990.64 km (14 × 70.76 km) deployed seven-core fiber cable with more than 600 fusion splices is field demonstrated for the first time, which achieves a real-time capacity–distance product of 221.9 Pb/s∙km. Specifically, the long-haul CDM transmission is simulated by cascading the fiber cores of two segments of 70.76 km seven-core fibers. And dynamic gain equalizers (DGEs) are utilized to mitigate the impacts of stimulated Raman scattering (SRS) and the uneven gain spectra of amplifiers in broadband transmissions by equalizing the power of signals with different wavelengths. This field trial demonstrates the feasibility of applying uncoupled MCF in long-haul OTN transmission systems and will contribute to its field implementation in terrestrial fiber cable systems. Full article
(This article belongs to the Special Issue Optical Networking Technologies for High-Speed Data Transmission)
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Review

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20 pages, 3250 KiB  
Review
Coherent Optics for Passive Optical Networks: Flexible Access, Rapid Burst Detection, and Simplified Structure
by Guangying Yang, Yixiao Zhu, Ziheng Zhang, Lina Man, Xiatao Huang, Xingang Huang and Weisheng Hu
Photonics 2025, 12(1), 68; https://doi.org/10.3390/photonics12010068 - 14 Jan 2025
Viewed by 821
Abstract
With the development of the Internet of Things, cloud networking, and 4K/8K high-definition video, global internet traffic has seen a dramatic increase. This surge in traffic has placed higher demands on the performance of optical networks, featuring higher data rates, lower latency, and [...] Read more.
With the development of the Internet of Things, cloud networking, and 4K/8K high-definition video, global internet traffic has seen a dramatic increase. This surge in traffic has placed higher demands on the performance of optical networks, featuring higher data rates, lower latency, and lower cost. The passive optical network (PON) is a representative scenario of optical access networks. Issues such as burst-mode detection in upstream PON scenarios, flexible rate allocation in downstream scenarios, and the simplification of hardware complexity at the optical network unit (ONU) side have attracted considerable attention. Compared to intensity modulation/direct detection (IM/DD), a recently proposed coherent PON incorporates a local oscillator laser at the receiver, enabling superior receiver sensitivity, spectrally efficient modulation, linear optical field recovery, and flexible channel selection. These features significantly enhance the flexibility and data rates of PON systems. This paper provides a comprehensive review of the development of coherent PONs, particularly in aspects of preamble design for burst-mode detection in upstream scenarios, the design of flexible rate PONs in downstream scenarios, and solutions for reducing hardware complexity at the ONU side. Full article
(This article belongs to the Special Issue Optical Networking Technologies for High-Speed Data Transmission)
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