Article
Engineering, Electrical & Electronic
Hitoshi Takeshita, Yusuke Shimomura, Kohei Hosokawa
Summary: This work investigates the feasibility of improving the energy efficiency of a cladding-pumped multicore (MC) EDFA by utilizing bidirectional (BD) pumping. It demonstrates that the optical power loss due to equalization can be reduced by controlling the optical power ratio of the forward and backward pumps. Under optimized conditions, a 1.7% pump conversion efficiency improvement and a 24% reduction in total optical pump power compared to conventional MC-EDFA were achieved.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Charles Matte-Breton, Rene-Jean Essiambre, Colin Kelly, Younes Messaddeq, Sophie LaRochelle
Summary: We report the characterization of a cladding-pumped multicore fiber with annular erbium doping for low gain compression over the C-band. The experimental results show that significant reduction in gain compression of multicore cladding-pump amplifiers can be achieved with the proposed annular doping design in the cladding.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Taiji Sakamoto, Ryota Imada, Kazuhide Nakajima
Summary: This paper proposes cross-sectional design guidelines suitable for a power efficient cladding-pumped coupled multi-core erbium-doped fiber amplifier (MC-EDFA). Numerical calculations and experimental verification were conducted to investigate the optimal core-to-cladding ratio (R-cc) for achieving high power conversion efficiency (PCE) in different operational bandwidths (C- or L-band) of the amplifier. The results showed that the PCE in the C-band amplifier improves as R-cc increases, whereas the PCE in the L-band amplifier maximizes at a specific R-cc value.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
Zhimu Gu, Qiang Qiu, Le He, Yinbo Chu, Nengli Dai, Jinyan Li
Summary: This paper investigates the pump efficiency of the pedestal 4-core erbium-doped fiber. Experimental results confirm that the introduction of the pedestal improves the output power compared to conventional multicore fiber.
2022 ASIA COMMUNICATIONS AND PHOTONICS CONFERENCE, ACP
(2022)
Article
Optics
Zhimu Gu, Qiang Qiu, Le He, Yang Chen, Yang Lou, Xiaoke Yin, Shaokun Liu, Wenzhen Li, Xinyue Zhao, Yingbin Xing, Yingbo Chu, Nengli Dai, Jinyan Li
Summary: A novel cladding-pumped 4-core erbium-doped fiber with a pedestal structure has been proposed and fabricated, showing significant gain improvement and noise reduction in the L-band. Experimental results demonstrate the high average gain and low average noise figure of this new fiber.
Article
Optics
Yanbiao Chang, Li Pei, Jingjing Zheng, Jianshuai Wang, Qian He, Jing Li, Tigang Ning, Li Zhong
Summary: An all-fiber few mode erbium doped fiber amplifier (FM-EDFA) with low differential modal gain (DMG) is demonstrated theoretically and experimentally. The all-fiber FM-EDFA with low DMG provides a cost-effective and stable alternative for high-integrated all-fiber long-haul spatial division multiplexing applications.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Beibei Cui, Shanyong Cai, Zhiguo Zhang
Summary: This paper focuses on relay assisted transmission in SDM wireless optical communication system, and develops a dual-hop SDM FSO communication model to demonstrate the performance improvement of the system with a relay.
IEEE PHOTONICS JOURNAL
(2022)
Article
Optics
Yizhou Wang, Takeshi Fujisawa, Kunimasa Saitoh
Summary: The paper presents an analytical expression for the mode-coupling coefficient between non-identical step-index cores, allowing for quick estimation of crosstalk in heterogeneous SI multi-core fibers. The analytical results are validated through numerical simulations using FEM and show good agreement. The feasibility of designing Hetero-SI-MCFs within standard cladding diameter is discussed, highlighting potential applications in SDM systems.
OPTICS COMMUNICATIONS
(2022)
Article
Multidisciplinary Sciences
Jun Chen Ke, Xiangyu Chen, Wankai Tang, Ming Zheng Chen, Lei Zhang, Li Wang, Jun Yan Dai, Jin Yang, Jun Wei Zhang, Lijie Wu, Qiang Cheng, Shi Jin, Tie Jun Cui
Summary: A new-architecture space-frequency-polarization-division multiplexed wireless communication system is proposed using an anisotropic space-time-coding digital metasurface, which can improve the channel capacity and space utilization.
NATIONAL SCIENCE REVIEW
(2022)
Review
Optics
Svetlana Nikolaevna Khonina, Nikolay Lvovich Kazanskiy, Muhammad Ali Butt, Sergei Vladimirovich Karpeev
Summary: This review presents an attention-grabbing and up-to-date overview of major multiplexing techniques, including wavelength division multiplexing, polarization division multiplexing, space division multiplexing, mode division multiplexing, and orbital angular momentum multiplexing. It also discusses hybrid multiplexing methods and techniques. This unique review paper highlights the most prominent and recent progress in multiplexing techniques in one place.
OPTO-ELECTRONIC ADVANCES
(2022)
Article
Engineering, Electrical & Electronic
Hirotaka Ono, Makoto Yamada
Summary: The analysis focuses on the power consumption of optical repeater subsystems in a multicore fiber link, comparing the power consumption of subsystems using multicore EDFAs with those using multiple single-core EDFAs. The results indicate that multicore EDFAs have certain advantages over single-core EDFAs in terms of power consumption efficiency.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Xutao Wang, Honglin Sun, Huihui Wang, Zhiqun Yang, Yaping Liu, Zhanhua Huang, Lin Zhang
Summary: In the context of Industry 4.0, the smart oilfield introduces the use of multicore fibers for increased data transmission capacity and high-sensitivity distributed sensing. This paper proposes a heterogeneously integrated seven-core fiber for interconnection and awareness applications in smart oilfields, which supports digital and analog signal transmission as well as temperature and vibration measurement. The proposed fiber exhibits great potential for efficient and cost-effective oil production in smart oilfields.
APPLIED SCIENCES-BASEL
(2023)
Article
Optics
Long Zhang, Li Pei, Jianshuai Wang, Jingjing Zheng, Kaihua Hu, Zhiqi Li, Tigang Ning, Jing Li, Li Zhong, Ruisi He
Summary: The amplification of long-haul mode division multiplexing (MDM) transmission systems is currently achieved through three steps, which can result in complexity and degraded transmission performance. To address this issue, this paper proposes an in-line few-mode erbium-doped fiber amplifier (FM-EDFA) based on cladding pumping, which enables simultaneous amplification and transmission in MDM systems. Experimental results demonstrate that the in-line FM-EDFA has excellent performance and shows great potential for practical long-haul transmission systems.
OPTICS AND LASER TECHNOLOGY
(2024)
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)
Proceedings Paper
Engineering, Electrical & Electronic
Koichi Maeda, Shigehiro Takasaka, Ryuichi Sugizaki
Summary: The new cladding pumping multicore EDFA can reduce core-to-core crosstalk and extend the distance of space division multiplexing transmission by using a specific configuration.
2021 ANNUAL CONFERENCE OF THE IEEE PHOTONICS SOCIETY (IPC)
(2021)
