Article
Engineering, Electrical & Electronic
Bruno R. P. Pinheiro, Joao L. Rebola, Adolfo V. T. Cartaxo
Summary: The influence of inter-core crosstalk (ICXT) on the performance of weakly-coupled multi-core fiber systems with coherent detection was studied. The study showed that with increasing skew-symbol rate product, system stability and maximum allowable ICXT level also increased, aligning with the results of other experiments.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Mayu Nakagawa, Masaki Ohzeki, Katsuhiro Takenaga, Kentaro Ichii
Summary: This paper proposes a novel method for inter-core crosstalk measurement in multi-core fibers using loopback and bidirectional optical time-domain reflectometer (OTDR) technique. The method enables simultaneous measurement of crosstalk and fiber attenuation, using the same measurement system as standard single-mode fibers.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Optics
Pengshuai Shao, Luyao Wang, Yan Wang, Shuguang Li, Zenghui Li, Xiaokai Wang, Liling Ma, Xiaojian Meng, Ying Guo, Jianshe Li, Tonglei Cheng, Yongze Liang, Weiwei Xu, Yu Qin, Hui Zhou
Summary: This study prepares seven-core five-mode fiber and single-core five-mode fiber with the same core structure using plasma chemical vapor deposition. The transmission characteristics of the fibers are measured and characterized, revealing stable transmission of multiple LP modes and low loss and bending resistance in the single-core fiber. The seven-core fiber shows low transmission loss and inter-core crosstalk, enabling high-density and low-crosstalk transmission. These achievements contribute to the development of future communication systems.
Article
Optics
Afzal Hossain, S. P. Majumder
Summary: The study found that crosstalk in 9-core and 7-core multi-core optical fibers is more pronounced compared to the 3-core fiber, leading to significant deterioration in Bit Error Rate (BER) performance. Additionally, there is a minimum achievable BER corresponding to specific core pitch and number.
Article
Engineering, Electrical & Electronic
Lin Sun, Gordon Ning Liu, Yi Cai, Jiangbing Du, Zuyuan He, Zhaohui Li, Chao Lu, Gangxiang Shen
Summary: This study proposes the use of orthogonal filtering technique to suppress inter-core crosstalk in multicore fiber transmission. By extracting individual channels separately, the implementation of signal reception can be simplified without the need for multiple-input and multiple-output digital signal processing.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Adolfo V. T. Cartaxo
Summary: This study investigates the impact of core loss imbalance on inter-core crosstalk in long-haul bidirectional uncoupled multi-core fiber transmission. The research shows that within a certain range, the loss coefficient imbalance has a linear effect on the crosstalk powers, with significant differences observed for different levels of imbalance.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Xi Zhang, Jian Wang
Summary: This paper proposes a novel ring-core fiber design that supports up to 5 orbital angular momentum mode groups with low crosstalk. The simulated results show that the designed fiber has low crosstalk between high-order adjacent mode groups and good bending characteristics. It also exhibits ultra-broadband performance ranging from 1530 nm to 1625 nm. This fiber design could be used for small-scale multiple-input multiple-output digital signal processing or combined with wavelength-division multiplexing for inter-group mode multiplexing transmission.
IEEE JOURNAL OF QUANTUM ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Huiyi Guo, Baiwei Mao, Yong You, Luhe Zhang, Siyu Chen, Zhi Wang, Yange Liu
Summary: Hollow core fibers have advantages in long-distance mode retention and high-speed transmission, but controlling the number of allowed modes remains a challenge. This paper introduces a new optical state observation method in k-space to propose a mode selection principle and demonstrate a fiber structure supporting only a single mode.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Optics
Shuailong Yang, Liu Yang, Fengguang Luo, Bin Li, Xiaobo Wang, Yuting Du, Ruiqin Wu
Summary: This paper presents an analysis of blind phase estimation for star QAM OPS system under low optical signal to noise ratio, discussing the performance and processing capability of blind phase estimation algorithms.
OPTICS COMMUNICATIONS
(2021)
Article
Optics
Zhixiang Yang, Yifei Zhao, Yifan Zhang, Guiyao Zhou
Summary: This paper presents a novel 7-core 5-mode fiber that has a large mode area and low inter-core crosstalk. By utilizing an air-trench structure and high-index ring, the proposed fiber achieves large mode area and low crosstalk. Numerical analyses demonstrate that the fiber can reliably transmit 5 LP modes in the C+L band, with an effective mode area of each LP mode larger than 110 square micrometers and a crosstalk smaller than -79 dB/km. Each mode has an effective refractive index difference larger than 1.1 x 10-3. Therefore, even when the mode area is large, a low crosstalk can still be achieved. The proposed fiber can be used to construct a high-capacity fiber optic transmission system.
Article
Engineering, Electrical & Electronic
Luyao Wang, Shuguang Li, Jianshe Li, Xiaojian Meng, Ying Guo, Zenghui Li, Xiaokai Wang, Yan Wang
Summary: A novel superposition-assisted structure (SAS) design is proposed to effectively suppress inter-core crosstalk in few-mode multicore fibers, achieving desired dispersion characteristics and nonlinear effects suppression for fiber communication systems.
OPTICAL FIBER TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Daniel Tauber, Brian Smith, David Lewis, Ernest Muhigana, Morten Nissov, Donald Govan, JinLin Hu, Yuxin Zhou, Jian Wang, Wen- Jiang, Roberto Galeotti, Flavio Dell'Orto, Rocco Siano
Summary: This paper reviews the ongoing role of coherent transmission in data center interconnect networks, including applications at rates of 400 Gbps, 800 Gbps, and higher. The article explores the market factors driving the demand for coherent DCI transmission solutions, with attention to the transition to an IP over DWDM architecture. The implications for small form factor, multi-vendor interoperable, low power consumption transceivers are investigated. The technical challenges for compact pluggable transceivers operating at symbol rates of 120 Gbaud and above, including speed, interconnect, packaging, and power consumption, are discussed in detail.
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
Computer Science, Hardware & Architecture
Bijoy Chand Chatterjee, Abdul Wadud, Imran Ahmed, Eiji Oki
Summary: The paper introduces a priority-based crosstalk-avoided core, mode, and spectrum allocation scheme in SS-EONs, which enhances resource utilization, reduces blocking probability, and allows higher traffic loads.
IEEE-ACM TRANSACTIONS ON NETWORKING
(2021)
Article
Computer Science, Hardware & Architecture
Yuya Seki, Yosuke Tanigawa, Yusuke Hirota, Hideki Tode
Summary: Space-division multiplexing elastic optical networks (SDM-EONs) with multi-core fibers (MCFs) have been improved by solving the route, modulation format, core, and spectrum assignment problems, but inter-core crosstalk (IC-XT) still needs to be addressed. This paper proposes a hierarchical core prioritization method to mitigate IC-XT and demonstrates its effectiveness through simulation results.
JOURNAL OF OPTICAL COMMUNICATIONS AND NETWORKING
(2023)
Article
Computer Science, Hardware & Architecture
Jordi Perello, Joan M. Gene, Albert Pages, Jose A. Lazaro, Salvatore Spadaro
JOURNAL OF OPTICAL COMMUNICATIONS AND NETWORKING
(2016)
Article
Computer Science, Hardware & Architecture
F. -J. Moreno-Muro, R. Rumipamba-Zambrano, P. Pavon-Marino, J. Perello, J. M. Gene, S. Spadaro
JOURNAL OF OPTICAL COMMUNICATIONS AND NETWORKING
(2017)
Article
Computer Science, Hardware & Architecture
Ruben Rumipamba-Zambrano, Jordi Perello, Joan M. Gene, Salvatore Spadaro
Article
Computer Science, Information Systems
Ruben Rumipamba-Zambrano, Jordi Perello, Joan M. Gene, Salvatore Spadaro
OPTICAL SWITCHING AND NETWORKING
(2018)
Article
Optics
J-R Alvarez, S. Sarmiento, J. A. Lazaro, J. M. Gene, J. P. Torres
Article
Engineering, Electrical & Electronic
Haoshuo Chen, Nicolas K. Fontaine, Joan M. Gene, Roland Ryf, David T. Neilson, Gregory Raybon
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2020)
Article
Computer Science, Hardware & Architecture
Jordi Perello, Joan M. Gene, Salvatore Spadaro
Summary: This paper presents a worst-case methodology for estimating the attainable spectral efficiency in a Flex Grid over multicore fiber (MCF) optical network. The methodology considers physical link noise and the signal-to-noise ratio in the Add module of spatial-division-multiplexing-enabled reconfigurable optical add and drop multiplexers, and examines the benefits of probabilistic constellation shaping (PCS) compared to traditional modulation formats. Extensive simulations are conducted to analyze the load gains of PCS under 1% bandwidth blocking probability, and the study also investigates the impact of fragmentation levels in the dynamic optical backbone networks.
JOURNAL OF OPTICAL COMMUNICATIONS AND NETWORKING
(2022)
Article
Chemistry, Multidisciplinary
Davide Careglio, Salvatore Spadaro, Albert Cabellos, Jose Antonio Lazaro, Pere Barlet-Ros, Joan Manel Gene, Jordi Perello, Fernando Agraz Bujan, Jose Suarez-Varela, Albert Pages, Jordi Paillisse, Paul Almasan, Jordi Domingo-Pascual, Josep Sole-Pareta
Summary: 5G represents a disruptive paradigm shift by integrating various network infrastructures into a unified converged network, facilitating the realization of the digital society. Through the ALLIANCE project, two new networking solutions are proposed to achieve optimal service provisioning. KDN and AI technologies play a crucial role in these solutions.
APPLIED SCIENCES-BASEL
(2021)
Proceedings Paper
Engineering, Electrical & Electronic
Jordi Perello, Joan M. Gene, Salvatore Spadaro
Summary: This paper proposes a novel methodology for estimating the worst-case spectral efficiency of end-to-end paths across a Multi-Core Fiber optical network, and compares the benefits of Probabilistic Constellation Shaping with traditional modulation formats. The results show that Probabilistic Constellation Shaping can achieve close to 13% load gains under specific conditions.
2021 INTERNATIONAL CONFERENCE ON OPTICAL NETWORK DESIGN AND MODELLING (ONDM)
(2021)
Proceedings Paper
Engineering, Electrical & Electronic
Joan M. Gene, Xi Chen, Junho Cho, Sethumadhavan Chandrasekhar, Peter Winzer
2020 OPTICAL FIBER COMMUNICATIONS CONFERENCE AND EXPOSITION (OFC)
(2020)
Proceedings Paper
Engineering, Electrical & Electronic
Jordi Perello, Joan M. Gene, Miroslaw Klinkowski, Jaume Comellas, Salvatore Spadaro
2020 22ND INTERNATIONAL CONFERENCE ON TRANSPARENT OPTICAL NETWORKS (ICTON 2020)
(2020)
Proceedings Paper
Engineering, Electrical & Electronic
D. Careglio, S. Spadaro, A. Cabellos, J. A. Lazaro, J. Perello, P. Barlet, J. M. Gene, J. Paillisse
2018 20TH ANNIVERSARY INTERNATIONAL CONFERENCE ON TRANSPARENT OPTICAL NETWORKS (ICTON)
(2018)
Proceedings Paper
Engineering, Electrical & Electronic
Ruben Rumipamba-Zambrano, Jordi Perello, Joan M. Gene, Salvatore Spadaro
2017 OPTICAL FIBER COMMUNICATIONS CONFERENCE AND EXHIBITION (OFC)
(2017)
Proceedings Paper
Engineering, Electrical & Electronic
Jose A. Lazaro, Salvatore Spadaro, Jordi Perello, Joan Gene, Jose A. Altabas, A. Pages, Davide Careglio, Pere Barlet-Ros, Albert Cabellos, Josep Sole-Pareta
2016 18TH INTERNATIONAL CONFERENCE ON TRANSPARENT OPTICAL NETWORKS (ICTON)
(2016)
