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Photonics
Special Issues
Exploring Optical Fiber Communications: Technology and Applications
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Exploring Optical Fiber Communications: Technology and Applications

A special issue of Photonics (ISSN 2304-6732). This special issue belongs to the section "Optical Communication and Network".

Deadline for manuscript submissions: 15 June 2025 | Viewed by 1433

Special Issue Editor

Dr. Jiahao Huo

E-Mail Website
Guest Editor
School of Computer and Communication Engineering, University of Science and Technology Beijing, Beijing, China
Interests: fiber optic communication; optical communication; optical transmission system; digital signal processing
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

With the rapid development of cloud computing, big data, the Internet of Things, and other new technologies, we have entered an era of digitalization and informatization. The number of internet users has been steadily increasing, which has accelerated the exponential expansion of data services. A prominent focus of current research is how to further enhance spectral efficiency and achieve high-speed, high-capacity data transmission. Optical fiber communication plays a key role in increasing data transmission rates, reducing costs, and enhancing system reliability, making it an indispensable part of modern communication networks. At present, key breakthroughs in optical fiber communication technology include high-order modulation formats, polarization multiplexing, wavelength division multiplexing, etc. Optical fiber communication can be widely applied in the fields of the internet and telephone networks, as well as in cable television, data centers, industrial production site monitoring, traffic monitoring and command, and more.

This Special Issue aims to publish selected contributions on technology and applications of fiber optic communications. Potential topics include, but are not limited to:

  • Optical fiber communications;
  • Optical components, devices and subsystems;
  • Advanced digital signal processing;
  • Novel optical transmission schemes;
  • Advanced optical transmission technology.

Dr. Jiahao Huo
Guest Editor

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 fiber communications
  • optical components, devices and subsystems
  • advanced digital signal processing
  • novel optical transmission schemes
  • advanced optical transmission technology

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Further information on MDPI's Special Issue policies can be found here.

Published Papers (2 papers)

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Research

10 pages, 2147 KiB  
Communication
Novel Spectrum Inversion-Based Double-Sideband Modulation with Low Complexity for a Self-Coherent Detection System
by Peng Qin, Jiahao Huo, Haolin Bai, Xiaoying Zhang, Jianlong Tao and Keping Long
Photonics 2025, 12(4), 302; https://doi.org/10.3390/photonics12040302 - 26 Mar 2025
Viewed by 262
Abstract
In high-capacity and short-reach applications, double-sideband self-coherent detection (DSB-SCD) has garnered significant attention due to its ability to recover optical fields of DSB signals without requiring a local oscillator. However, DSB-SCD is fundamentally constrained by the non-ideal receiver transfer function, necessitating a guard [...] Read more.
In high-capacity and short-reach applications, double-sideband self-coherent detection (DSB-SCD) has garnered significant attention due to its ability to recover optical fields of DSB signals without requiring a local oscillator. However, DSB-SCD is fundamentally constrained by the non-ideal receiver transfer function, necessitating a guard band between the carrier and signal. While the conventional twin-single-sideband (twin-SSB) modulation scheme addresses this requirement, it incurs substantial implementation complexity. In this paper, we propose a spectrum inversion-based double-sideband (SI-DSB) modulation scheme, where spectral inversion shifts the DSB signal to the high-frequency region, creating a guard band around the zero frequency. After photodetector detection, baseband signal recovery is achieved through subsequent spectral inversion. Compared with the twin-SSB modulation scheme, this approach significantly reduces DSP complexity. The simulation exploration two modulation formats of pulse–amplitude modulation and quadrature-amplitude modulation, demonstrating a comparable system performance between SI-DSB and twin-SSB modulation schemes. We also illustrate the parameter optimization process for the SI-DSB modulation scheme, including carrier-to-signal power ratio and guard band. Furthermore, validation with three FADD receivers further demonstrates the superior performance of the proposed SI-DSB modulation in DSB-SCD systems. Full article
(This article belongs to the Special Issue Exploring Optical Fiber Communications: Technology and Applications)
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12 pages, 4254 KiB  
Article
Modified Decision Feedback Equalizers for Nonlinearity Compensation in Coherent PAM4 Transmission System
by Zhengxuan Li, Zheng Xin, Siyu Luo, Acai Tan and Bingyao Cao
Photonics 2025, 12(3), 245; https://doi.org/10.3390/photonics12030245 - 9 Mar 2025
Viewed by 731
Abstract
To address chromatic dispersion (CD) and nonlinear impairments in coherent optical four-level pulse amplitude modulation (PAM4) systems, we propose a magnitude-assisted decision feedback equalizer (MA-DFE). The proposed scheme utilizes signal amplitude information to construct the error function, which is robust to carrier phase [...] Read more.
To address chromatic dispersion (CD) and nonlinear impairments in coherent optical four-level pulse amplitude modulation (PAM4) systems, we propose a magnitude-assisted decision feedback equalizer (MA-DFE). The proposed scheme utilizes signal amplitude information to construct the error function, which is robust to carrier phase noise. Therefore, no additional carrier phase recovery operation is required during digital signal processing (DSP). Under conditions without CD pre-compensation, MA-DFE achieves 80 Gb/s single-wavelength transmission over a 25 km standard single-mode fiber (SSMF) in the C-band. When considering a bit error rate (BER) of 1 × 10−2 for the soft decision threshold, the link budget achieves 27 dB. In addition, we incorporate the phase into the error function, proposing the phase-assisted decision feedback equalizer (PA-DFE). PA-DFE is also unaffected by carrier phase noise and demonstrates better performance than MA-DFE when equalizing the more severe signal impairments caused by SOA gain saturation. Ultimately, we achieve a link budget of 29 dB using PA-DFE. Full article
(This article belongs to the Special Issue Exploring Optical Fiber Communications: Technology and Applications)
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