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Advancements in Optical Information Processing and Communication Technologies

A special issue of Photonics (ISSN 2304-6732).

Deadline for manuscript submissions: 31 May 2025 | Viewed by 868

Special Issue Editors

State Key Lab of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China
Interests: ultra-high-speed coherent optical transmission; next-generation optical access network; optical network performance monitoring; wired/wireless fused optical communication
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
State Key Laboratory of Information Photonics and Optical Communications, School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, No. 10 Xitucheng Road, Haidian District, Beijing 100876, China
Interests: photonic signal processing; optical parametric amplifier; nonlinear optics; nonlinear optical devices; phase-sensitive amplifier

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Guest Editor
Institute of Intelligent Photonics, Nankai University, Tianjin 300071, China
Interests: microwave photonics; optical communication; optoelectronic fusion; high-speed optoelectronics; integrated optoelectronics

Special Issue Information

Dear Colleagues,

Since the breakthrough of low-loss optical fiber in 1970, optical communication has become one of the most popular communication methods due to its high bandwidth, low loss and large transmission range. Since then, optical communication has changed the way the world is connected. Optical communication technology has been widely applied in various fields of industry and life, and it involves many important disciplines. Its connectivity covers a variety of scenarios, including transoceanic transmission, fixed networks, free space communications, and converged access. With the increasing demand for bandwidth, new optical communication theories and technologies are constantly being explored, including emerging disciplines such as multi-band optical transmission, optical information processing, and integrated photonic devices that have developed in recent years. The advantages of optical information processing technology include its high speed, high precision, non-contact, non-destructive quality, and other characteristics. It is applied to various scenarios including optical computing, optical recognition, optical storage, and optical transmissions. It combines communication and optics, successfully solving many scientific problems and injecting new vitality into the field, hence becoming a very active research direction.

With the advent of digital transformation, digital economy, and digital society, the fields of optical information processing and communication will face a new round of active periods and important technological changes. At the same time, optical information processing and communication technology will be widely applied in fields such as cloud computing, the Internet of Things, and artificial intelligence.

Several key topics in the field of optical information processing and communication include the following:

  • Optic communication systems and subsystems;
  • Advanced optical transmissions and interconnections;
  • Photonic signal processing;
  • Optical computing for AI acceleration;
  • The integration and packaging of optical devices.

Dr. Tao Yang
Dr. Jiabin Cui
Dr. Kunpeng Zhai
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 transmissions
  • optical interconnections
  • optical information processing
  • optical computing
  • integrated photonic devices
  • nonlinear optics

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Published Papers (1 paper)

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Research

16 pages, 5588 KiB  
Article
Enhanced Carrier Phase Recovery Using Dual Pilot Tones in Faster-than-Nyquist Optical Transmission Systems
by Jialin You, Tao Yang, Yuchen Zhang and Xue Chen
Photonics 2024, 11(11), 1048; https://doi.org/10.3390/photonics11111048 - 7 Nov 2024
Viewed by 645
Abstract
Compared with high spectrum efficiency faster-than-Nyquist (FTN) backbone network, an enhanced carrier phase recovery based on dual pilot tones is more sensitive to capital cost in FTN metropolitan areas as well as inter-datacenter optical networks. The use of distributed feedback (DFB) lasers is [...] Read more.
Compared with high spectrum efficiency faster-than-Nyquist (FTN) backbone network, an enhanced carrier phase recovery based on dual pilot tones is more sensitive to capital cost in FTN metropolitan areas as well as inter-datacenter optical networks. The use of distributed feedback (DFB) lasers is a way to effectively reduce the cost. However, under high symbol rate FTN systems, equalization-enhanced phase noise (EEPN) induced by a DFB laser with large linewidth will significantly deteriorate the system performance. What is worse, in FTN systems, tight filtering introduces inter-symbol interference so severe that the carrier phase estimation (CPE) algorithm of the FTN systems is more sensitive to EEPN, thus it will lead to a more serious cycle slip problem. In this paper, an enhanced carrier phase recovery based on dual pilot tones is proposed to mitigate EEPN and suppress cycle slip, in which the chromatic dispersion (CD)-aware Tx and LO laser phase noise is estimated, respectively. Offline experiments results under 40 Gbaud polarization multiplexing (PM) 16-quadrature amplitude modulation (QAM) FTN wavelength division multiplexing (FTN-WDM) systems at 0.9 acceleration factor, 5 MHz laser linewidth, and 500 km transmission demonstrate that the proposed algorithm could bring about 0.65 dB improvement of the required SNR for the normalized generalized mutual information of 0.9 compared with the training sequence-based cycle slip suppression carrier phase estimation (TS-CSS) algorithm. Full article
Show Figures

Figure 1

Figure 1
<p>The enhanced carrier phase recovery based on dual pilot tones in FTN systems. (<b>a</b>) Optical spectrum of pilot tones and payload. (<b>b</b>) The enhanced carrier phase recovery based on dual pilot tones.</p>
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<p>The effect of different EEPNs on the performance of the BPS algorithm.</p>
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<p>The MSE of high-frequency pilot tone and low-frequency pilot tone.</p>
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<p>The PSR vs. frequency of high-frequency pilot tone under (<b>a</b>) 1 MHz Tx/LO LLW and 300 km transmission; (<b>b</b>) 1 MHz Tx/LO LLW and 500 km transmission; (<b>c</b>) 5 MHz Tx/LO LLW and 300 km transmission; (<b>d</b>) 5 MHz Tx/LO LLW and 500 km transmission.</p>
Full article ">Figure 5
<p>Required SNR vs. the PSR of low-frequency pilot tone under (<b>a</b>) 1 MHz Tx/LO LLW; (<b>b</b>) 5 MHz Tx/LO LLW.</p>
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<p>Required SNR vs. pilot tone extraction bandwidth under (<b>a</b>) 1 MHz Tx/LO LLW; (<b>b</b>) 5 MHz Tx/LO LLW.</p>
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<p>(<b>a</b>) Required SNR improvement due to EEPN compensation vs. span number under 5 MHz Tx/LO LLW. (<b>b</b>) Required SNR vs. combined laser bandwidth under 500 km transmission.</p>
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<p>Offline experiment setup for 40 GBaud PM-16QAM FTN-WDM systems using proposed algorithm.</p>
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<p>The PSR vs. frequency of the high-frequency pilot tone under (<b>a</b>) 5 MHz Tx/LO LLW and 300 km transmission; (<b>b</b>) 5 MHz Tx/LO LLW and 500 km transmission.</p>
Full article ">Figure 10
<p>Required SNR vs. the PSR of low-frequency pilot tone under 5 MHz Tx/LO LLW.</p>
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<p>Required SNR vs. pilot tone extraction bandwidth under 5 MHz Tx/LO LLW.</p>
Full article ">Figure 12
<p>Required SNR improvement due to EEPN compensation vs. span number under 5 MHz Tx/LO LLW.</p>
Full article ">
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