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作者机构:Key Laboratory of Education Ministry on Luminescence and Optical Information Technology National Physical Experiment Teaching Demonstration Center School of Physical Science and Engineering Beijing Jiaotong University Beijing 100044 China Jeme Tienyow Honors College Beijing Jiaotong University Beijing 100044 China Intelligent Sensor Network Engineering Research Center of Hebei Province Information Engineering College Hebei GEO University Shijiazhuang 050031 China
出 版 物:《Results in Physics》 (Results Phys.)
年 卷 期:2024年第59卷
学科分类:07[理学] 0805[工学-材料科学与工程(可授工学、理学学位)] 0704[理学-天文学] 0702[理学-物理学]
基 金:National Natural Science Foundation of China, NSFC, (62375013) National Natural Science Foundation of China, NSFC
摘 要:This paper proposes a broadband mode converter utilizing a dual-hollow-core anti-resonant fiber (DHC-ARF) for the first time, in which the mode index matching between LP01 and LP11 modes is achieved by adjusting the core diameter size of the hollow-core anti-resonant fiber (HC-ARF). Notably, the air gap can become the main channel for the energy exchange between the two cores by adjusting the air gap size between the two cores of the DHC-ARF. The coupling length of the mode converter is greatly reduced, and a compact and broadband mode converter is realized. Simulation results demonstrate that the proposed mode converter achieves a coupling efficiency (CE) of 92.79 % at a wavelength of 1.55 μm at a length of 10.7 mm. The bandwidth of 330 nm at a CE greater than 90 % covers the E + S + C + L + U bands. The proposed mode converter exhibits a large core diameter compatible with hollow-core fiber communication and is expected to be applied for high-speed and high-capacity hollow-core mode-division-multiplexing fiber-optic communication. The device design methodology presented in this paper can also provide technical references for developing higher-order mode converters, such as LP01 mode to LP02 mode and LP01 mode to LP21 mode, based on DHC-ARF. © 2024