Propagation characteristics of photonic crystal fibers selectively filled with ionic liquid

• 来源期刊: 纳米技术与精密工程（英文版）
• 年，卷（期）: 2021,（1）
• 所属期刊栏目: RESEARCH ARTICLES
• 页码范围: 1-6
• 页数: 6页
• 语种: 英文
• DOI: 10.1063/10.0002950

摘要

We present a numerical and experimental study of the propagation characteristics of photonic crystal fibers (PCFs) selectively filled with ionic liquid (IL;1-butyl-3-methylimidazolium iodine).Three types of IL-filled PCF are investigated: one with all air holes filled,one with an IL-filled air hole in the second ring,and one with an IL-filled air hole in the third ring.The results show that the third type of IL-filled PCF is the most sensitive to temperature;the sensitivity of resonant dips between the LP01 and LP21 modes is ～-2.9 nm/℃.Moreover,the intensity of the resonant dips changes with the polarization angle of the light source;the sensitivity is ～-0.79 dB per unit polarization angle.Based on this property,IL-filled PCFs with different utilities can be realized by changing the filling position flexibly.Consequently,IL-filled PCFs can be used under flexible conditions and controllable temperatures to create a compact polarization-angle sensor.