A unique hexagonal lattice structure of silica-based solid core photonic crystal fiber (PCF) surrounded by array of air holes is proposed. The cladding portion of the structure consists of five rings where core is made up of 11 small rings filled with methanol. Three different-shaped structures are used to analyze the effect on PCF parameters where the first structure uses circular air holes in cladding and core, the second structure consists of circular air holes in cladding and elliptical air holes in core, and the last structure was designed by using elliptical air holes in both cladding and core. Optical properties birefringence, confinement loss, and negative dispersion have been found theoretically and compared. A novel and relatively simple approach depicts the results that attain high birefringence, low confinement loss, and negative dispersion. It is found that the presence of elliptic air holes instead of circular air holes in the core region and the cladding brings higher birefringence, low confinement loss, and highly negative dispersion.

中文翻译：

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高双折射负色散填充甲醇的混合光子晶体光纤

提出了一种独特的六方晶格结构的二氧化硅基实芯光子晶体光纤 (PCF)，其周围环绕着气孔阵列。该结构的包层部分由五个环组成，其中纤芯由 11 个充满甲醇的小环组成。采用三种不同形状的结构来分析对PCF参数的影响，第一种结构在包层和纤芯中使用圆形气孔，第二种结构由包层中的圆形气孔和纤芯中的椭圆形气孔组成，最后一种结构被设计通过在包层和纤芯中使用椭圆形气孔。已从理论上发现并比较了光学特性双折射、限制损失和负色散。一种新颖且相对简单的方法描绘了获得高双折射、低限​​制损失、和负分散。发现在芯区和包层中存在椭圆形气孔而不是圆形气孔带来更高的双折射、低限​​制损耗和高负色散。