Hameed Mohamed Farhat O, Heikal A M, Younis B M, Abdelrazzak Maher, Obayya S S A
Opt Express. 2015 Mar 23;23(6):7007-20. doi: 10.1364/OE.23.007007.
A novel ultra-high tunable photonic crystal fiber (PCF) polarization filter is proposed and analyzed using finite element method. The suggested design has a central hole infiltrated with a nematic liquid crystal (NLC) that offers high tunability with temperature and external electric field. Moreover, the PCF is selectively filled with metal wires into cladding air holes. Results show that the resonance losses and wavelengths are different in x and y polarized directions depending on the rotation angle φ of the NLC. The reported filter of compact device length 0.5 mm can achieve 600 dB / cm resonance losses at φ = 90° for x-polarized mode at communication wavelength of 1300 mm with low losses of 0.00751 dB / cm for y-polarized mode. However, resonance losses of 157.71 dB / cm at φ = 0° can be achieved for y-polarized mode at the same wavelength with low losses of 0.092 dB / cm for x-polarized mode.
提出了一种新型的超高可调谐光子晶体光纤（PCF）偏振滤波器，并采用有限元方法进行了分析。所建议的设计有一个中心孔，里面注入了向列型液晶（NLC），它在温度和外部电场作用下具有高度可调性。此外，光子晶体光纤在包层气孔中选择性地填充了金属线。结果表明，根据向列型液晶的旋转角度φ，x和y偏振方向的共振损耗和波长是不同的。所报道的紧凑型器件长度为0.5毫米的滤波器，在1300毫米通信波长下，对于x偏振模式，在φ = 90°时可实现600 dB / cm的共振损耗，而y偏振模式的损耗低至0.00751 dB / cm。然而，在相同波长下，对于y偏振模式，在φ = 0°时可实现157.71 dB / cm的共振损耗，而x偏振模式的损耗低至0.092 dB / cm。
