Article
Engineering, Electrical & Electronic
Weicheng Chen, Rongxiang Guo, Dian Wan, Tarun Sharma, Lin Zhang, Tiegen Liu, Zhenzhou Cheng
Summary: On-chip Kerr frequency combs provide unprecedented opportunities for optical communications and optical interconnects with compact, low-cost, and high-density wavelength-division multiplexing (WDM) techniques. A dual-mode Kerr frequency comb based on a graphene-on-silicon (GOS) microring is proposed to overcome the limitation of traditional approaches and achieve high-speed optical communications.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2022)
Article
Optics
Bok Young Kim, Yoshitomo Okawachi, Jae K. Jang, Xingchen Ji, Michal Lipson, Alexander L. Gaeta
Summary: A high efficient coherent beam combining of Kerr combs is demonstrated via on-chip synchronization to greatly enhance comb-line powers. This technology allows the power of comb systems to exceed that of an individual comb system by more than an order of magnitude, which is beneficial for applications such as data communications and spectroscopy.
LASER & PHOTONICS REVIEWS
(2023)
Article
Engineering, Electrical & Electronic
Alexis Carbo Meseguer, Juliana Tiburcio de Araujo, Jean-Christophe Antona
Summary: This article studies the technical viability of Multi-core and Hollow-core fibers for submarine links, taking into account transceiver limitations and typical power constraints. The opportunities and challenges of adopting these technologies in the mid and long-term are discussed. Results show that Hollow-core fibers are not yet competitive with multi-core fibers, but may be in certain power-constrained scenarios. Coupled-core fibers and Hollow-core fibers with higher potential bandwidth are considered for long-term scenarios, but power limitations and fiber attenuation must be addressed to achieve higher capacities.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Mark Shtaif, Cristian Antonelli, Antonio Mecozzi, Xi Chen
Summary: This article reviews the challenges faced by optical fiber transmission, discusses the impact of the nonlinear nature of fiber-optic transmission on capacity assessment and fundamental concepts, and introduces some solutions and new transmission schemes. State-of-the-art transmission experiments are also reviewed and compared.
PROCEEDINGS OF THE IEEE
(2022)
Article
Engineering, Electrical & Electronic
Cristian Antonelli, Antonio Mecozzi
Summary: The proposed design for coupled-core multi-core fibers aims to achieve extremely low levels of modal dispersion – coined as NEMO fibers. This design sacrifices some fiber mode-mixing effectiveness in exchange for reducing nonlinear signal distortions. A semi-analytical tool developed in this study effectively characterizes the impact of various perturbations on the ideal fiber structure.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Pallavi G. Patki, Pengyu Guan, Lu Li, Taras I. Lakoba, Leif Katsuo Oxenlowe, Michael Vasilyev, Michael Galili
Summary: This article focuses on the practical applications of optical regeneration, emphasizing the importance of scalability with the number of WDM channels. The main approaches to WDM-compatible regeneration are described, with detailed reviews of two recent 16-channel regeneration demonstrations. The scalability, practical considerations, and outlook for these WDM regeneration methods are discussed.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Yingning Wang, Yuanpeng Liu, Wenqian Zhao, Jian Yang, Wenpu Geng, Yuxi Fang, Changjing Bao, Yongxiong Ren, Zhi Wang, Yan-ge Liu, Zhongqi Pan, Yang Yue
Summary: This paper designs and analyzes a multi-ring-air-core fiber supporting thousands of OAM modes, and investigates the tradeoffs between ring number/density and system performance parameters. Based on the analytical results, the fiber has high transmission rate and spectrum efficiency, and shows great potential for various applications in optical communication systems.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Editorial Material
Nanoscience & Nanotechnology
Alan E. Willner, Cong Liu
Summary: Structured light is a promising technology for increasing communication capacity by transmitting multiple orthogonal beams simultaneously. Future challenges lie in utilizing multiple orbital angular momentum modes to enhance system performance.
Article
Engineering, Electrical & Electronic
Anirudh Vijay, Joseph M. Kahn
Summary: Direct-detection links using mode division multiplexing (MDM) in multimode fiber (MMF) can compensate for crosstalk by employing receiver-side optical signal processing (OSP), and to enable MDM in higher-order mode groups, transmitter-side OSP is proposed. However, modal dispersion and higher-order modal dispersion (MD) limit the performance of OSP in mitigating inter-symbol interference and crosstalk. The impact of higher-order MD can be predicted by the PM coherence bandwidth or the group-delay spread within a mode group.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Xingyuan Xu, Weiwei Han, Mengxi Tan, Yang Sun, Yang Li, Jiayang Wu, Roberto Morandotti, Arnan Mitchell, Kun Xu, David J. Moss
Summary: Optical neural networks (ONNs) based on wavelength-division multiplexing (WDM) techniques offer high bandwidth and analog architecture for enhanced computing power and energy efficiency. Integrated microcombs have been used to implement ONNs, with successful applications such as optical convolution accelerators for human image processing at 11 Tera operations per second. However, challenges and limitations of ONNs still need to be addressed for future applications.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2023)
Article
Computer Science, Information Systems
Miaofang Zhou, Ping Jiang, Huajun Yang, Weinan Caiyang, Yan Qin, Yifan Zheng
Summary: This paper proposes a new type of optical fiber structure with air trenches, air holes, and a depressed step-index core for efficient mode separation. Simulation results show that the fiber can support up to 12 spatial modes with broadband characteristics.
Article
Optics
David Gonzalez-Andrade, Xavier Le Roux, Guy Aubin, Farah Amar, Thi Hao Nhi Nguyen, Paula Nuno Ruano, Thi Thuy Duong Dinh, Dorian Oser, Diego Perez-Galacho, Eric Cassan, Delphine Marris-Morini, Laurent Vivien, Carlos Alonso-Ramos
Summary: On-chip spatial and polarization multiplexing is proposed as an effective strategy to enhance the data transmission capacity of integrated optical transceivers. By manipulating the coupling between guided modes and free-propagating beams, spatial and polarization multiplexing with state-of-the-art performance is achieved. Two-polarization and three-mode multiplexed links are developed using standard silicon-on-insulator technology, demonstrating error-free operation at 40 Gbps with low power penalties. This approach can be applied to future implementation of more complex multiplexing schemes.
LASER & PHOTONICS REVIEWS
(2023)
Article
Engineering, Electrical & Electronic
Shan Wang, Hailin Yang, Yuwen Qin, Di Peng, Songnian Fu
Summary: This study investigates the potential of space division multiplexing (SDM) for power-over-fiber (PWoF) technique, and verifies it through weakly-coupled multicore fiber (WC-MCF) design and experiments. The results show that the SDM-enabled PWoF scheme is superior to the wavelength division multiplexing (WDM) scheme in terms of energy light delivery scalability and wavelength division multiplexing savings.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Stotaw Talbachew Hayle, Yibeltal Chanie Manie, Cheng-Kai Yao, Tsung-Yuan Yeh, Cheng-Hung Yu, Peng-Chun Peng
Summary: In this work, we proposed a novel hybrid system that utilizes a single shared FSO transmission channel for both optical and sensor signal transmission. By using the FSO transmission channel to solve the geographical constraints of fiber installation, and adopting IWDM technique to increase the number of sensors, we achieved significant cost reduction in system installation and complexity, as well as improved accuracy in wavelength detection techniques.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Manabu Arikawa, Kohei Nakamura, Kohei Hosokawa, Kazunori Hayashi
Summary: We demonstrated a successful long-haul WDM and SDM transmission of 32-Gbaud polarization-division multiplexed quadrature phase-shift keying signals. Our experiment showed that the mode dependent loss (MDL) of the coupled-4-core EDFAs was a major limiting factor for transmission performance, and the rms MDL per span should be below 0.4 dB for further long-haul transmission distance over 6000 km.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Daniele Orsuti, Cristian Antonelli, Alessandro Chiuso, Marco Santagiustina, Antonio Mecozzi, Andrea Galtarossa, Luca Palmieri
Summary: We propose a deep learning-based phase retrieval method for accurately reconstructing the optical field of a single-sideband minimum-phase signal. This method utilizes a fully convolutional Neural Network (NN) model to achieve non-iterative and robust phase retrieval. Compared to the Kramers-Kronig (KK) receiver, our method avoids distortions and digital upsampling, achieving better performance and lower complexity.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Eyal Wohlgemuth, Yaron Yoffe, Ido Attia, Muhammad Imran, Prajwal Doddaballapura Lakshmijayasimha, Andrea Marotta, Pantea Nadimi Goki, Hamutal Shalom, Francesco Fresi, Cristian Antonelli, Antonio Mecozzi, Prince Anandarajah, Luca Poti, Dan Sadot
Summary: This paper introduces the concept of multi-homodyne coherent detection for stealth and secured optical communications, and demonstrates a high-speed transmission achieved in a deployed multi-core fiber network. The effects of chromatic dispersion on transmission quality are analyzed, and the use of multi-core fibers to mitigate this effect is proposed.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Antonio Mecozzi, Cristian Antonelli, Mikael Mazur, Nicolas Fontaine, Haoshuo Chen, Lauren Dallachiesa, Roland Ryf
Summary: We explore the utilization of the fiber channel transfer matrix obtained from a digital coherent receiver for environmental sensing. Our findings reveal that the polarization rotation vector, which characterizes the unitary part of the matrix, displays high sensitivity to perturbations impacting the optical fiber link. This vector can be easily extracted from the time-dependent transfer matrix reconstructed during the operation of the coherent receiver, serving as a valuable observable for environmental monitoring.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Optics
Chiara Lasagni, Paolo Serena, Alberto Bononi, Antonio Mecozzi, Cristian Antonelli
Summary: We investigate the impact of modulation format on the interaction between mode dispersion and fiber nonlinear interference in space-division multiplexed systems. The results show that the interplay between mode dispersion and modulation format significantly affects the magnitude of cross-phase modulation. We propose a simple formula that takes into account the modulation-format dependence of cross-phase modulation variance under arbitrary levels of mode dispersion, thus extending the ergodic Gaussian noise model.
Article
Engineering, Electrical & Electronic
Francesco Lorenzi, Gianluca Marcon, Andrea Galtarossa, Luca Palmieri, Antonio Mecozzi, Cristian Antonelli, Marco Santagiustina
Summary: This study proposes an extended time-domain nonlinear interference noise (NLIN) model for analyzing Raman-amplified polarization multiplexed WDM links. The model enables the evaluation of nonlinear interference and inter-channel power transfer induced by stimulated Raman scattering, while accounting for the evolution of average signal power.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
N. Sambo, A. Nespola, A. Sgambelluri, A. Marotta, L. Dallachiesa, R. Ryf, P. Castoldi, A. Mecozzi, T. Hayashi, A. Carena, C. Antonelli
Summary: This article introduces the use of space division multiplexing (SDM) to support traffic growth. SDM networks enable multiplexing over space and spectrum dimensions. The NETCONF protocol and the YANG data modeling language have been identified as the control plane solutions for network configuration and management. A field trial is presented based on a deployed coupled-core four-core fiber, where a software-defined network (SDN) controller configures probabilistic constellation shaping through NETCONF to optimize spectral efficiency. The trial demonstrates different rates and optical reach values, and characterizes the impact of soft failures on transmission performance.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Ruben S. Luis, Georg Rademacher, Benjamin J. Puttnam, Giammarco Di Sciullo, Andrea Marotta, Robert Emmerich, Nicolas Braig-Christophersen, Ralf Stolte, Fabio Graziosi, Antonio Mecozzi, Colja Schubert, Giuseppe Ferri, Frank Achten, Pierre Sillard, Roland Ryf, Lauren Dallachiesa, Satoshi Shinada, Cristian Antonelli, Hideaki Furukawa
Summary: This paper extends a recent demonstration of a 2-line side 15-mode spatial division multiplexing network node. The node uses fifteen 2 x 2 wavelength cross-connects (WXCs) to direct up to six 5 Tb/s, 15-mode, spatial super channels (SSCs). The network node is demonstrated using a 6.1 km, 15-mode, multi-mode fiber (MMF) and further extended to support up to 20 SSCs for a throughput per line side of 100 Tb/s. MIMO requirements for this type of systems are strongly dependent on the differential delays of the different modes propagating within the network node.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Proceedings Paper
Optics
F. Lorenzi, G. Marcon, A. Galtarossa, L. Palmieri, A. Mecozzi, C. Antonelli, M. Santagiustina
Summary: This paper presents an extension of the NLIN model to Raman amplified links in WDM systems. Noise estimation is obtained for an 80km amplified link with optimized pump placement, in both co- and counterpropagating regimes, for a C+L band configuration.
2022 EUROPEAN CONFERENCE ON OPTICAL COMMUNICATION (ECOC)
(2022)
Proceedings Paper
Optics
R. S. Luis, G. Rademacher, B. J. Puttnam, G. Di Sciullo, A. Marotta, R. Emmerich, N. Braig-Christophersen, R. Stolte, F. Graziosi, A. Mecozzi, C. Schubert, G. Ferri, F. Achten, P. Sillard, R. Ryf, L. Dallachiesa, S. Shinada, C. Antonelli, H. Furukawa
Summary: We present a high spatial spectral efficiency SDM ROADM operating on a field-deployed 15-mode fiber network. We evaluate spatial superchannel switching scenarios for full add&drop, full express, partial add drop, and optical bypass with a granularity of 5 Tb/s.
2022 EUROPEAN CONFERENCE ON OPTICAL COMMUNICATION (ECOC)
(2022)
Proceedings Paper
Optics
Antonio Mecozzi, Cristian Antonelli, Mikael Mazur, Nicolas Fontaine, Haoshuo Chang, Lauren Dallachiesa, Roland Ryf
Summary: This article discusses the use of the full transmission matrix extracted from a standard coherent receiver to improve the environmental sensing capabilities of optical fiber links.
2022 EUROPEAN CONFERENCE ON OPTICAL COMMUNICATION (ECOC)
(2022)
Proceedings Paper
Optics
Daniele Orsuti, Cristian Antonelli, Alessandro Chiuso, Marco Santagiustina, Antonio Mecozzi, Andrea Galtarossa, Luca Palmieri
Summary: This study proposes a deep learning-based phase retrieval receiver for minimum-phase signal recovery. Simulation results demonstrate that the receiver achieves the HD-FEC limit at BER 3.8e-3 with 2-dB lower CSPR and 1.6-dB better receiver sensitivity compared to a conventional four-fold upsampled Kramers-Kronig receiver in relevant system settings.
2022 EUROPEAN CONFERENCE ON OPTICAL COMMUNICATION (ECOC)
(2022)
Proceedings Paper
Optics
Georg Rademacher, Ruben S. Luis, Benjamin J. Puttnam, Giammarco Di Sciullo, Robert Emmerich, Nicolas Braig-Christophersen, Andrea Marotta, Lauren Dallachiesa, Roland Ryf, Antonio Mecozzi, Colja Schubert, Pierre Sillard, Frank Achten, Giuseppe Ferri, Jun Sakaguchi, Cristian Antonelli, Hideaki Furukawa
Summary: This paper characterizes the first field-deployed 15-mode fiber cable and evaluates its differential mode delay and mode dependent loss over two distances. The results confirm the field-usability of the cable, as both quantities are sufficiently low.
2022 EUROPEAN CONFERENCE ON OPTICAL COMMUNICATION (ECOC)
(2022)
Proceedings Paper
Optics
N. Sambo, A. Nespola, A. Sgambelluri, A. Marotta, L. Dallachiesa, R. Ryf, P. Castoldi, A. Mecozzi, C. Antonelli, T. Hayashi, A. Carena
Summary: This paper presents how a SDN controller configures probabilistic constellation shaping via NETCONF to optimize spectral efficiency based on path length or degradations caused by soft failure. The integrated data and control planes are demonstrated in a field trial using multi-core fiber with 4-coupled cores and multiple rates (800-850-900-950-1000Gb/s).
2022 EUROPEAN CONFERENCE ON OPTICAL COMMUNICATION (ECOC)
(2022)
Proceedings Paper
Optics
Daniele Orsuti, Cristian Antonelli, Alessandro Chiuso, Marco Santagiustina, Antonio Mecozzi, Andrea Galtarossa, Luca Palmieri
Summary: In this paper, we propose a deep learning-based phase retrieval scheme that can perform full-field recovery and compensate for propagation-related impairments. Simulation results show that this scheme can relax the requirements for carrier-to-signal power ratio and improve receiver sensitivity.
2022 ITALIAN CONFERENCE ON OPTICS AND PHOTONICS (ICOP)
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
M. Mazur, R. Ryf, N. K. Fontaine, A. Marotta, E. Borjeson, L. Dallachiesa, H. Chen, T. Hayashi, T. Nagashima, T. Nakanishi, T. Morishima, F. Graziosi, L. Palmieri, D. T. Neilson, P. Larsson-Edefors, A. Mecozzi, C. Antonelli
Summary: In this study, parallel continuous measurements of deployed space-division multiplexing (SDM) fibers are carried out using real-time coherent receivers implemented on FPGAs. The fast readouts enable real-time tracking of the DSP implementation, demonstrating the compatibility of coupled-core fibers with real-time DSP implementations.
2022 OPTICAL FIBER COMMUNICATIONS CONFERENCE AND EXHIBITION (OFC)
(2022)