Abstract
A polarization filter at the two communication windows of 1.31 and 1.55 μm based on photonic crystal fiber (PCF) coated by nanoscale gold film is proposed. The effects of geometrical parameters of the PCF on the performances of polarization filter are evaluated by finite element method (FEM). Numerical simulations reveal that the polarization filter possesses ultra-short length of 400 μm and high extinction ratios of 41 and −150 dB at the communication wavelengths of 1.31 and 1.55 μm respectively. The bandwidth of extinction ratio (ER) better than 20 dB is 58 nm at the communication window of 1.31 μm. Moreover, the bandwidth of ER better than −20 dB is 164 nm at the communication window of 1.55 μm.
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This study was supported by the National Natural Science Foundation of China (Grant No. 61178026 and 61475134), and the Natural Science Foundation of Hebei Province, China (Grant No. E2012203035).
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Liu, Q., Li, S., Li, J. et al. Photonic Crystal Fiber Polarization Filter Based on Coupling Between Core Mode and SPP Mode. Plasmonics 11, 857–863 (2016). https://doi.org/10.1007/s11468-015-0119-8
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DOI: https://doi.org/10.1007/s11468-015-0119-8