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
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
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
Qiang Qiu, Zhimu Gu, Le He, Yang Chen, Yang Lou, Jinggang Peng, HaiQing Li, Yingbin Xing, Yingbo Chu, Nengli Dai, Jinyan Li
Summary: By optimizing the mode field intensity distribution within the interaction region, the noise performance of erbium-doped fiber amplifiers can be improved. The use of depressed refractive index erbium-doped fiber significantly reduces the noise figure, and further reduction can be achieved by narrowing the doping region.
IEEE PHOTONICS JOURNAL
(2022)
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
Tianjin Wen, Shecheng Gao, Wei Li, Jiajing Tu, Jinpei Li, Yongguang Xiao, Hanyu Gao, Yingyu Chen, Jianye Zhao, Cheng Du, Weiping Liu, Zhaohui Li
Summary: This paper proposes a Gaussian-like erbium doping distribution design method for ring-core erbium doped fiber (RC-EDF) to optimize the differential modal gain (DMG), reducing the fabrication complexity of the fiber preform. The fabricated RC-EDF shows ultra-low DMG less than 0.3 dB at 1550 nm for all four supported OAM modes (l = 1, 2, 3, 4), with a gain above 15 dB and DMG less than 1.2 dB across the C-band under a 500 mW pump power. Additionally, the proposed OAM-EDFA demonstrates successful transmission of 32 channels (8 wavelengths x 4 OAM modes) carrying 32-Gbaud QPSK OAM modes multiplexed-WDM signals, with an average OSNR penalty of 0.34 dB.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Andis Supe, Sergejs Olonkins, Aleksejs Udalcovs, Ugis Senkans, Rihards Murnieks, Lilita Gegere, Dmitrijs Prigunovs, Jurgis Grube, Edgars Elsts, Sandis Spolitis, Oskars Ozolins, Vjaceslavs Bobrovs
Summary: This study investigated the characteristics and performance of a cladding-pumped erbium/ytterbium co-doped fiber amplifier (EYDFA) through numerical simulations to identify the optimal configuration. The results showed that a 7-meter long EYDF and co-propagating pump direction with specific pump source parameters yielded the best performance, providing high gain and low noise figure for amplifying 40 DWDM channels. Additionally, the study examined EYDFA gain bandwidth, output power, and sensitivity to absorption and emission cross-sections, demonstrating the impact on amplification efficiency through energy transfer between Yb3+ and Er3+.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Electrical & Electronic
Minglu Cai, Kan Wu, Junmin Xiang, Zeyu Xiao, Tieying Li, Chao Li, Jianping Chen
Summary: Erbium-doped lithium niobate on insulator (Er:LNOI) has shown potential for gain and integrated amplifiers and lasers. We present a highly efficient waveguide amplifier on Er:LNOI with excellent performance and wide application prospects.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Tetsuya Hayashi, Taiji Sakamoto, Yusuke Yamada, Roland Ryf, Rene-Jean Essiambre, Nicolas Fontaine, Mikael Mazur, Haoshuo Chen, Takemi Hasegawa
Summary: Randomly-coupled multi-core fiber (MCF) technology has gained attention for its applicability in long-haul transmission systems. Compared to weakly-coupled MCFs, randomly-coupled MCFs can achieve higher spatial channel density and lower transmission loss using existing single-mode fiber core designs. This article provides an overview of the advancements in randomly-coupled MCF technology, including its classification, design, optical property characterization methods, and performance improvements in transmissions.
PROCEEDINGS OF THE IEEE
(2022)
Article
Engineering, Electrical & Electronic
Hao Guo, Ting Li, Fengping Yan, Guobin Ren, Wei Wang, Xiangdong Wang, Qi Qin, Guifang Wu, Jiao Gao, Baoyuan Wang, Haoyu Tan, Wenhua Ren, Ting Feng
Summary: This article reports the design and characterization of a six-mode erbium-doped fiber amplifier (6M-EDFA) for mode division multiplexing systems. The design utilizes a center-depressed optical fiber and adjustment of parameters to reduce splice loss. Through analysis and optimization, high gain and low differential modal gain are achieved. The performance of the designed amplifier is verified using a MDM transmission system.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
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)
Article
Chemistry, Multidisciplinary
Yaping Liu, Zhiqun Yang, Xutao Wang, Yongmin Jung, Lin Zhang
Summary: This paper proposes a new design for few-mode erbium-doped fiber amplifiers (FM-EDFAs) that achieves significantly reduced differential modal gain (DMG) through strong mode coupling. A new numerical model based on a fiber transfer matrix is used to systematically investigate the DMGs of FM-EDFAs and analyze two different types of six-mode fiber amplifiers as exemplar demonstrations.
APPLIED SCIENCES-BASEL
(2022)
Article
Computer Science, Information Systems
Rosa Ana Perez-Herrera, Pablo Roldan-Varona, Luis Rodriguez Cobo, Jose Miguel Lopez-Higuera, Manuel Lopez-Amo
Summary: A new distributed short linear cavity fiber laser has been proposed and experimentally demonstrated, capable of generating switchable single longitudinal-mode laser emissions. By using a reflector doped with erbium as a saturable absorber, multiple single-mode emissions can be achieved.
Article
Engineering, Electrical & Electronic
Jinhui Feng, Xin Cheng, Huawei Jiang, Yan Feng
Summary: A high-power continuous-wave single-frequency 1530 nm Er:Yb co-doped fiber amplifier using polarization-maintaining fiber as the gain medium is demonstrated. Core pumping with a 1480 nm Raman fiber laser is utilized to achieve the required population inversion for efficient 1530 nm amplification. Numerical simulation proves the advantage of 1480 nm core-pumping over the usual 9xx nm diode cladding pumping. The obtained maximum single-frequency 1530 nm laser power is 45.5 W with an amplified spontaneous emission suppression ratio of 46 dB, corresponding to an optical efficiency of 74%.
OPTICAL FIBER TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Jiandong Liu, Liang Chu, Bin Liu, Juan Liu, Yingying Hu, Xing-Dao He, Jinhui Yuan, Yangbo Zhou, Dejun Liu, Zabih Ghassemlooy, James Martin, Yong Qing Fu, Qiang Wu
Summary: This study proposes and experimentally demonstrates a highly sensitive hydrogen sensor coated with Pt/WO3 powder and erbium-doped fiber amplifier (EDFA). The sensor is constructed by splicing a tapered small-diameter coreless fiber (TSDCF) between two single-mode fibers (SMFs). The Pt/WO3 powder on the surface of a polydimethylsiloxane (PDMS) film coated on the TSDCF structure serves as the hydrogen-sensitive material. An EDFA is introduced to improve the Q factor and resolution of the sensor's output spectrum. The sensor exhibits good stability with a light intensity fluctuation of less than 1.26 dB over a 30-minute duration, and a maximum light intensity variation and sensitivity of -32.41 dB and -21.25 dB/%, respectively, when the hydrogen concentration varies from 0% to 1.44%.
IEEE SENSORS JOURNAL
(2023)
