论文部分内容阅读
通过在实芯光子晶体光纤的包层空气孔中填充5CB型液晶,设计出了在室温附近具有高热调谐灵敏度的光子带隙型液晶光子晶体光纤。采用有限元方法研究了光子带隙随光纤结构参数的变化规律、光子带隙位置的热调谐特性、光纤限制损耗随包层孔圈数的变化以及限制损耗的热调谐特性。结果表明,该光子晶体光纤光子带隙的位置主要由包层孔直径决定,其限制损耗随包层孔圈数的增加而显著降低;随着温度由25.1℃增加至34.8℃,光子带隙位置和限制损耗曲线均发生红移,限制损耗的最小值位置处的平均热调谐灵敏度约为10.3nm/℃;在光子带隙的中心波长附近,该光子带隙型液晶光子晶体光纤和相同结构未填充液晶的光纤之间具有高耦合效率。
The photonic bandgap liquid crystal photonic crystal fiber with high thermal tuning sensitivity near room temperature was designed by filling 5CB liquid crystal in the cladding air hole of solid photonic crystal fiber. The change law of the photonic band gap with the fiber structure parameters, the thermal tuning characteristics of the photonic band gap position, the change of the optical fiber limit loss with the number of cladding holes and the thermal tuning characteristics of the limiting loss were studied by the finite element method. The results show that the photonic bandgap position of the photonic crystal fiber is mainly determined by the diameter of the cladding hole. The limiting loss of the photonic crystal fiber decreases with the increase of the number of cladding holes. With the increase of temperature from 25.1 ℃ to 34.8 ℃, And the limiting loss curve all undergo redshift. The average thermal tuning sensitivity at the minimum value of the limiting loss is about 10.3 nm / ° C. In the vicinity of the central wavelength of the photonic bandgap, the photonic band gap liquid crystal photonic crystal fiber and the same structure Liquid crystal-filled fibers have high coupling efficiency.