GA based management of strain response in RII-type single mode optical fiber

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• 作者：F. Makouei ^{f.makouei92@ms.tabrizu.ac.ir" class="auth_mail" title="E-mail the corresponding author} ; S. Makouei ; ^{makouei@tabrizu.ac.ir" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Axial strain ; Multilayer optical fiber ; MFD ; Single mode ; GA
• 刊名：Optik - International Journal for Light and Electron Optics
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：127
• 期：20
• 页码：8333-8340
• 全文大小：850 K

文摘

In this article, the strain behaviour of the depressed inner core triple clad single mode optical fiber is investigated. Both tensile and compressive types of axial strain are considered in simulations. The modal analysis of the fiber structure is based on linear polarization (LP) approximation method. Mode field diameter (MFD) of the fiber is selected as the indirect parameter for strain sensing task and investigating the MFD behaviour of the fiber, the strain sensitivity is augmented through independent adjustment of the structural parameters. Subsequently, a design procedure based on evolutionary genetic algorithm (GA) is introduced for consideration of simultaneous effect of all hyper-parameters of the fiber which yields the strain sensitivity of 15.96 pmμε⁻¹. The substantial sensitivity attained is as the inherence of complicated configuration in multilayer fiber as well as the GA based method. Furthermore, negligible temperature sensitivity of −6.97 × 10⁻⁷ pmC⁻¹ removes the temperature compensation technique which is inevitable stage of fiber optic measurement systems. Additionally, the simulation results admit the stable strain response of the proposed structure.