Abstract
A broad bandwidth polarization filter based on photonic crystal fiber (PCF) coated with gold layer is proposed and simulated by the full vector finite element method. The surface plasmon resonance coupling theory is studied, and the factors that affect the polarization filtering effect are analyzed. By changing the structural parameters of the PCF, we realize polarization filter at 1.55 and 1.48 μm. In the designed polarization filter, the maximum loss of the unwanted y-polarization at 1.55 μm is 803.56 dB/cm and at 1.48 μm is 732.69 dB/cm. Besides, a broad bandwidth of 1000 nm with the crosstalk better than 20 dB is obtained. The suggested PCF is competitive for polarization device.
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This work was supported by the National Natural Science Foundation of China (Grant Nos. 61475134, 61505175) and Key Program of the Natural Science Foundation of He Bei Province (Grant No. F2017203193).
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Wu, J., Li, S., Dou, C. et al. A high extinction and wide bandwidth polarization filter based on surface plasmon resonance. Opt Quant Electron 50, 16 (2018). https://doi.org/10.1007/s11082-017-1271-5
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DOI: https://doi.org/10.1007/s11082-017-1271-5