Abstract
The polarization characteristics of photonic crystal fiber (PCF) with nanoscale gold film is evaluated by using the finite element method. The cross-section structure of the PCF is composed of a hexagonal lattice of air holes in which an air hole is gold coated. The resonance strength and the impact of structural parameters of the PCF on the polarization filter characteristics are studied. By our structure, the loss of y-polarized mode is further larger than the loss of x-polarized mode at the wavelength 1.31 and 1.55 μm. The corresponding loss in y-polarized can reach a value of 136,253 and 167607 dB/m at the resonance wavelengths of 1.31 and 1.55 μm respectively. It can be used for carrying data/voice at the communication windows of 1.31 and 1.55 μm. Meanwhile, we can realize the filtering effect with a very short fiber.
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