A novel gold-coated PCF polarization filter based on surface plasmon resonance. (June 2020)

• Record Type: Journal Article
• Authors: Yan, Xin; Guo, Ziheng; Cheng, Tonglei; Li, Shuguang
• Is Part Of: Optics & laser technology. Volume 126(2020)
• Publication Date: 2020-06
• Subjects: Photonic crystal fiber -- Surface plasmon resonance -- Polarization filter -- Metal filling -- Peak loss; Optics -- Periodicals; Lasers -- Periodicals; Electronic journals; 621.366
• DOI: 10.1016/j.optlastec.2020.106125
• Languages: English
• ISSNs: 0030-3992

Abstract

Highlights: The polarization filter we designed is novel and have a high performance. The loss peak in Y-polarization is much higher than in X-polarization. Air-holes except the innermost layer also influence the loss peak well. The PCF filter can be widely used in system integration. Abstract: In this study, a novel photonic crystal fiber (PCF) polarization filter has been designed. To resonate the surface plasma mode with the core mode, gold is selectively filled in the air holes. Using numerical simulations based on the finite element method, the influence of structural parameters on the filter is analyzed, and a set of rules for designing the PCF polarization filter is determined. The numerical simulation shows that the peak loss in the y-polarization direction at 1.31 μm reaches 1209.57 dB/cm, whereas the peak loss in the x-polarization is close to zero. Working at 1310 nm in the communication band, a new type of PCF is designed using these characteristics.