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An ultrashort length and high extinction ratio polarization beam splitter based on dual-core PCF

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Abstract

A novel dual-core photonic crystal fiber polarization beam splitter with high extinction ratio and ultrashort length is proposed. The effects of geometrical parameters of the DC-PCF on propagation performances are analyzed via finite element method. Numerical results demonstrate that the coupling length ratio of proposed polarization beam splitter can reach 1.997, and 420-µm-long physical length can also be obtained at the wavelength of 1.55 µm. High extinction ratios can reach − 54.43 dB, 69.09 dB and − 43.48 dB at the wavelengths of 1.37 µm, 1.55 µm and 1.68 µm, respectively. Furthermore, the bandwidths of high extinction ratios higher than 20 dB and 10 dB are about 33 nm and 96 nm at the wavelength of 1.55 µm. Considering the fabrication, the design has been simplified in order to reduce the difficulty of fabrication compared with complex designs, which is expected to have broad applications in optical devices field.

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Acknowledgements

This work has been supported in part by the Youth Project on Basic Research of Yanshan University (Grant No. 16LGA011).

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Authors and Affiliations

  1. The Key Laboratory on Microstructural Material Physics of Hebei Province, College of Sciences, Yanshan University, Qinhuangdao, 066004, People’s Republic of China

    Yu Bai, Rui Hao & Bingqian Cao

  2. Beijing North Great Wall Photoelectric Instruments Co., Ltd., Beijing, 100053, People’s Republic of China

    Bo Yuan

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  1. Yu Bai
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  2. Rui Hao
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  3. Bo Yuan
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  4. Bingqian Cao
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Correspondence to Rui Hao.

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Bai, Y., Hao, R., Yuan, B. et al. An ultrashort length and high extinction ratio polarization beam splitter based on dual-core PCF. J Opt 50, 257–263 (2021). https://doi.org/10.1007/s12596-021-00684-0

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  • DOI: https://doi.org/10.1007/s12596-021-00684-0

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