Article
Engineering, Electrical & Electronic
Georg Rademacher, Ruben S. Luis, Benjamin J. Puttnam, Roland Ryf, Sjoerd van der Heide, Tobias A. Eriksson, Nicolas K. Fontaine, Haoshuo Chen, Rene-Jean Essiambre, Yoshinari Awaji, Hideaki Furukawa
Summary: This paper compares the use of 3-mode few-mode fibers and 3-core coupled-core multi-core fibers in space-division multiplexed transmission systems. The analysis shows that the coupled-core multi-core fiber achieves higher data rates at shorter transmission distances.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Optics
Mingqing Zuo, Dawei Ge, JiaXin Liu, Yuyang Gao, Lei Shen, Xiaobo Lan, Zhangyuan Chen, Yongqi He, Juhao Li
Summary: This paper proposes an intermodal-MIMO-free MDM transmission scheme based on weakly coupled multiple-ring-core FMF, which achieves long-haul FMF transmission by reducing intermodal crosstalk. The feasibility of the scheme is verified through simulations and experiments, providing possibilities for practical applications of long-haul MDM techniques.
Article
Engineering, Electrical & Electronic
Jihene Lataoui, Alaaeddine Rjeb, Nejeh Jaba, Habib Fathallah, Mohsen Machhout
Summary: Space division multiplexing is a promising solution for improving transmission capacity and spectral efficiency. SDM over few mode multicore fibers is an attractive approach. This study focuses on the design of Raised Cosine (RC) profile for multicore fibers and proposes several promising candidate solutions.
OPTICAL FIBER TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Shoma Tateno, Hitoshi Takeshita, Kohei Hosokawa, Emmanuel Le Taillandier de Gabory
Summary: Bidirectional transmission in multicore fiber reduces core-to-core crosstalk, changing the design of multicore fiber and submarine cable systems. By analyzing submarine systems, we demonstrate the capacity increase with bidirectional transmission. For regional Asian systems up to 3,000 km, 6-core MCF systems with bidirectional transmission offer the highest cable capacity.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
P. Boffi, N. Sambo, P. Martelli, P. Parolari, A. Gatto, F. Cugini, P. Castoldi
Summary: This paper investigates the network architecture and provisioning for Mode-Group Division Multiplexing (MGDM) in optical networks to offer high capacity. By dividing modes into groups and using reduced-complexity MIMO receivers, the complexity of MIMO can be limited while allowing routing of different groups along different paths. Simulations show that this scheme effectively improves throughput in different network scenarios.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Junjie Xiong, Lin Ma, Ying Shi, Linbin Bai, Zuyuan He
Summary: We designed and fabricated all-fiber fan-in/fan-out devices for square lattice structure coupled-core multicore fiber. By tailoring a vanishing core bridge fiber, we achieved low insertion losses and minimal total power fluctuation for the FI/FO devices. This is very useful for studying and applying CC-MCFs with ultra-small core pitches.
IEEE PHOTONICS JOURNAL
(2022)
Article
Optics
Angela Amphawan, Walid Sahraoui, Smail Berrah
Summary: This paper proposes a technique for selectively exciting fifteen mode groups in a multimode fiber using an elliptical few mode fiber, and experimental results show that this method can improve the modal purity of the channels and reduce the bit error rate.
Article
Optics
Wenqian Xu, Peiyu Wu, Qi Yao, Rongjun Zhang, Pengfei Li, Leimin Bao, Cheng Wang, Shenfei Chen, Yuhui Zhang, Yedong Shen
Summary: People spend a significant amount of time on phones, causing sleep disruption and eye fatigue. While eye protection modes claim to safeguard eye health, their effectiveness on image quality and circadian effect is examined in this study. The results show that the circadian effect is inversely proportional to color quality when switching to the eye protection mode, indicating a tradeoff between nighttime circadian effect and image quality.
Article
Engineering, Electrical & Electronic
John D. Downie, Yongmin Jung, Sergejs Makovejs, Merrion P. Edwards, David J. Richardson
Summary: We compare different options for amplification in trans-oceanic repeatered submarine systems using multicore fiber transmission. Our analysis focuses on relative cable capacity and relative system cost/bit. We evaluate the optical performance of parallel single-core erbium-doped fiber amplifiers (SC-EDFAs) and multicore erbium-doped fiber amplifiers (MC-EDFAs) with various configurations. Key parameters like noise figure, amplifier bandwidth, electrical-to-optical conversion efficiency, and amplifier cost impact the expected capacity and cost/bit performance. Our findings show that MC-EDFAs with either core- or cladding-pumping may offer lower cost/bit compared to parallel SC-EDFAs, but cladding-pumping could reduce cable capacities due to higher noise figure and potentially lower amplifier bandwidth.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Tristan Kremp, Yue Liang, Alan H. McCurdy
Summary: Multicore fiber is a promising technology to increase the transmission bandwidth of optical fiber links. Fusion splicing is indispensable for connecting multicore fibers, and precise alignment is crucial to minimize insertion loss. This paper presents an azimuthal alignment algorithm based on side-view images, which considers the twist rates of the fibers. The algorithm has been demonstrated to be stable and versatile for various fibers, achieving low splice losses and accurate twist rate detection.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
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
Jing Jiang, Makoto Tsubokawa
Summary: This study introduces the integration of optical MIMO technology into SDM communication and proposes a solution to the limitations of applying MIMO in transmission paths with optical switches through a ring network. The research shows that within the ring network model, MIMO can effectively compensate for capacity degradation caused by inter-core crosstalk, while the protection function can significantly reduce capacity loss in the event of failures.
OPTICAL FIBER TECHNOLOGY
(2021)
Article
Optics
Fengming Zhang, Zhuyixiao Liu, Haoze Du, Yuanhui Shao, Lei Shen, Liubo Yang, Changkun Yan, Zhiyong Zhao, Ming Tang
Summary: We propose a rapid and precise method for designing multiple step-index bridge fibers with ultra-low insertion loss in few-mode multi-core fiber Fan-in/Fan-out devices. By applying the genetic algorithm to optimize the structural parameters, we achieve multi-mode operation and less than 1.0 dB insertion loss for the first 6 LP modes in space division multiplexing systems composed of few-mode multi-core fibers. Furthermore, we successfully design and fabricate the corresponding Fan-in/Fan-out devices for connecting with single-core 6-mode fibers and 7-core 6-mode fibers, with average insertion losses ranging from 0.88 dB to 1.42 dB for different LP modes.
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
Chemistry, Analytical
Ravil Idrisov, Adrian Lorenz, Manfred Rothhardt, Hartmut Bartelt
Summary: This paper presents a novel multicore optical waveguide component based on a fiber design optimized for selective grating inscription in multiplexed sensing applications. It enables an increase in optical sensor capacity, extension of sensing length, and preservation of spatial sensing resolution.
