A photonic crystal fiber was selectively infiltrated only two of the air holes near the core with liquid crystal. The selective infiltration caused geometric asymmetry and created high birefringence. Because of the geometric asymmetry, the response to varying electric field is concerned with electric field direction. A Sagnac interferometer was set to investigate the electric tuning characteristics of the selectively infiltrated photonic crystal fiber. The effective refractive-indices of the fiber varies with electric field due to reorientation of liquid crystal molecules. The highest sensitivity was 1.12 nm/V (504 nm/kV/mm) with tuning range of 7 nm when electric field direction was parallel to the connecting line of infiltrated holes. The response time of the selectively infiltrated photonic crystal fiber was studied. The device can be utilized as voltage sensors, electro-optical modulators and filters.

中文翻译：

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LC选择性渗透PCF萨格纳克干涉仪的电调谐特性


光子晶体光纤仅选择性地用液晶渗透到纤芯附近的两个气孔中。选择性渗透导致几何不对称并产生高双折射。由于几何不对称性，对变化电场的响应与电场方向有关。设置萨尼亚克干涉仪来研究选择性渗透光子晶体光纤的电调谐特性。由于液晶分子的重新取向，光纤的有效折射率随电场变化。当电场方向平行于浸润孔连线时，最高灵敏度为1.12 nm/V（504 nm/kV/mm），调谐范围为7 nm。研究了选择性渗透光子晶体光纤的响应时间。该器件可用作电压传感器、电光调制器和滤波器。