Kumar Ajeet, Saini Than Singh, Naik Kishor Dinkar, Sinha Ravindra Kumar
Appl Opt. 2016 Jul 1;55(19):4995-5000. doi: 10.1364/AO.55.004995.
A rectangular core photonic crystal fiber structure has been presented and analyzed for single-polarization single-mode operation. Single-polarization is obtained with asymmetric design and by introducing different loss for x-polarization and y-polarization of fundamental modes. Single-polarization single-mode operation of the proposed photonic crystal fiber is investigated in detail by using a full vector finite element method with an anisotropic perfectly matched layer. The variations of the confinement loss and effective mode area of x-polarization and y-polarization of fundamental modes have been simulated by varying the structural parameters of the proposed photonic crystal fiber. At the optimized parameters, confinement loss and effective mode area is obtained as 0.94 dB/m and 60.67 μm for y-polarization as well as 26.67 dB/m and 67.23 μm for x-polarization of fundamental modes, respectively, at 1.55 μm. Therefore simulation results confirmed that, 0.75 m length of fiber will be sufficient to get a y-polarized fundamental mode with an effective mode area as large as 60.67 μm.
提出并分析了一种用于单偏振单模工作的矩形纤芯光子晶体光纤结构。通过非对称设计并对基模的x偏振和y偏振引入不同损耗来实现单偏振。采用带有各向异性完全匹配层的全矢量有限元方法，对所提出的光子晶体光纤的单偏振单模工作进行了详细研究。通过改变所提出的光子晶体光纤的结构参数，模拟了基模x偏振和y偏振的限制损耗和有效模面积的变化。在优化参数下，在1.55μm波长处，基模y偏振的限制损耗和有效模面积分别为0.94dB/m和60.67μm²，基模x偏振的限制损耗和有效模面积分别为26.67dB/m和67.23μm²。因此，模拟结果证实，0.75m长的光纤足以获得有效模面积高达60.67μm²的y偏振基模。
