Journal of Northeastern University Natural Science ›› 2018, Vol. 39 ›› Issue (11): 1540-1544.DOI: 10.12068/j.issn.1005-3026.2018.11.005

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Characteristic Analysis of Gold-Coated Photonic Crystal Fiber Polarization Filter

YAN Xin, WANG Hai-yang   

  1. School of Information Science & Engineering, Northeastern University, Shenyang 110819, China.
  • Received:2017-08-26 Revised:2017-08-26 Online:2018-11-15 Published:2018-11-09
  • Contact: YAN Xin
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Abstract: A photonic crystal fiber polarization filter based on surface plasmon resonance is proposed and investigated. The gold is coated into the selected air holes in order to make surface plasmon modes and core modes resonate. The finite element method is used to analyze the effect on the filter performance by changing the parameters. Numerical simulation results show that the positions of resonance peaks and the resonance strength of core mode and surface plasmon mode can be well adjusted by changing the thickness of gold film and diameter of air holes. The confinement loss in x-polarization can reach to 740.5dB/cm at 1.31μm, the confinement loss in y-polarization is very low, and the loss peaks in x-polarization and y-polarization are separated by a large distance. Then a novel kind of photonic crystal fiber polarization filter working at the communication wavelength is designed.

Key words: photonic crystal fiber, surface plasmon resonance, polarization filter, loss peak, gold-coated

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