Design of a photonic crystal fiber polarization beam splitter with simple structure and ultra-wide bandwidth
Yun-Peng Wei(魏云鹏)1, Jin-Hui Yuan(苑金辉)1,2,†, Yu-Wei Qu(屈玉玮)1, Shi Qiu(邱石)1, Xian Zhou(周娴)2, Bin-Bin Yan(颜玢玢)1, Kui-Ru Wang(王葵如)1, Xin-Zhu Sang(桑新柱)1, and Chong-Xiu Yu(余重秀)1
1 State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China; 2 Research Center for Convergence Networks and Ubiquitous Services, University of Science&Technology Beijing(USTB), Beijing 100083, China
Abstract A novel polarization beam splitter (PBS) based on dual-core photonic crystal fiber (DC-PCF) is proposed in this work. The proposed DC-PCF PBS contains two kinds of lattices and three kinds of air holes to form the asymmetrical elliptic dual-core structure. By using the full-vector finite element method, the propagation characteristics of the proposed DC-PCF PBS are investigated. The simulation results show that the bandwidth of the proposed DC-PCF PBS can reach to 340 nm, which covers the S + C + L + U communication bands, the shortest splitting length is 1.97 mm, and the maximum extinction ratio appears near wavelength 1550 nm. Moreover, the insertion loss of the proposed DC-PCF PBS is very low. It is believed that the proposed DC-PCF PBS has important applications in the field of all-optical communication and network.
Yun-Peng Wei(魏云鹏), Jin-Hui Yuan(苑金辉), Yu-Wei Qu(屈玉玮), Shi Qiu(邱石), Xian Zhou(周娴), Bin-Bin Yan(颜玢玢), Kui-Ru Wang(王葵如), Xin-Zhu Sang(桑新柱), and Chong-Xiu Yu(余重秀) Design of a photonic crystal fiber polarization beam splitter with simple structure and ultra-wide bandwidth 2023 Chin. Phys. B 32 104210
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