A Photonic Crystal Fiber Polarized Filter at 1.55 μm Based on Surface Plasmon Resonance

• DOI: 10.1007/s11468-015-0155-4
• Publication Date: 2015-12-22T00:00:22Z
• Authors: Chao Dou; Xili Jing; Shuguang Li; Qiang Liu; Jing Bian
• Keywords: Polarizing filter; Extinction ratio

A single-polarization photonic crystal fiber (PCF) based on surface plasmon resonance (SPR) is proposed. Finite element method is employed in simulating the PCF with gold-coated. The resonance wavelength can be modulated by changing the thickness of gold layer. At the resonance wavelength 1.55 μm, the loss of y-polarized mode is much larger than the loss of x-polarized mode. When the fiber length is set to 2 mm, the value of extinction ratio reaches to −118.7 dB, the y-polarized mode is suppressed and only x-polarized mode can be guided. The fiber is applicable in the production of single-polarization filter. The PCF has a simple structure and a big error tolerance, it has a good practicability.