Analysis of a new circular photonic crystal fiber with large mode area

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• 作者：Abdelkader Medjouri^a ; ^b ; ^{madjourikader@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; Lotfy Mokhtar Simohamed^c ; Omar Ziane^b ; Azzedine Boudrioua^d
• 关键词：Circular lattice photonic crystal fiber ; Large mode area ; FDTD method ; Confinement loss ; Bending loss
• 刊名：Optik - International Journal for Light and Electron Optics
• 出版年：2015
• 出版时间：December 2015
• 年：2015
• 卷：126
• 期：24
• 页码：5718-5724
• 全文大小：2471 K

文摘

A new design of large mode area (LMA) circular lattice photonic crystal fiber (CL-PCF) is proposed and numerically investigated. The cladding is formed by six rings of air holes arranged in circular configuration and the core is obtained by only omitting one air hole in the center. The transmission characteristics such as confinement loss, effective mode area, chromatic dispersion and bending loss are analyzed by using a finite difference in time domain (FDTD) method combined with perfectly matched layer (PML) boundary condition. Results show that around 1.55 μm, the proposed CL-PCF exhibits an effective mode area larger than 1000 μm² with a confinement loss as low as 7.64 × 10⁻³ dB/km for an air-filling fraction of $\raisebox{1ex}{$d$}\!\left/ \!\raisebox{-1ex}{$\Lambda $}\right.=0.16$. Furthermore, the effect of bending is reported and two new variants of CL-PCF are presented in the aim to mitigate its induced loss: CL-PCF with double air holes diameter in single side and CL-PCF with double cladding constant.