Cladding Modes Analysis of Photonics Crystal Fiber for Refractive Index Sensors Using Finite Element Method

Naeem, Khurram; Nguyen, Linh V.; Alameh, Kamal; Chung, Youngjoo

doi:10.1364/cleo.2010.jwa59

Cited by 2 publications

(2 citation statements)

References 5 publications

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“…Given the rapid development of the computer industry, the finite element method has become an indispensable computation tool for solving engineering problems in electromagnetism. This numerical simulation method is established on the basis of variational principles, domain meshing, and interpolation function [ 30 , 31 ]. The refractive index profile induced by CO 2 laser was calculated using an empirical formula based on numerically obtained thermal stresses [ 32 ].…”

Section: Introductionmentioning

confidence: 99%

Numerical Approach to Modeling and Characterization of Refractive Index Changes for a Long-Period Fiber Grating Fabricated by Femtosecond Laser

et al. 2016

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A 3D finite element model constructed to predict the intensity-dependent refractive index profile induced by femtosecond laser radiation is presented. A fiber core irradiated by a pulsed laser is modeled as a cylinder subject to predefined boundary conditions using COMSOL5.2 Multiphysics commercial package. The numerically obtained refractive index change is used to numerically design and experimentally fabricate long-period fiber grating (LPFG) in pure silica core single-mode fiber employing identical laser conditions. To reduce the high computational requirements, the beam envelope method approach is utilized in the aforementioned numerical models. The number of periods, grating length, and grating period considered in this work are numerically quantified. The numerically obtained spectral growth of the modeled LPFG seems to be consistent with the transmission of the experimentally fabricated LPFG single mode fiber. The sensing capabilities of the modeled LPFG are tested by varying the refractive index of the surrounding medium. The numerically obtained spectrum corresponding to the varied refractive index shows good agreement with the experimental findings.

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Section: Introductionmentioning

confidence: 99%

Numerical Approach to Modeling and Characterization of Refractive Index Changes for a Long-Period Fiber Grating Fabricated by Femtosecond Laser

et al. 2016

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“…From Table 3, it can be seen that the refractive index resolution from the various types of optical fiber and method have an estimated resolution ranging from 10 -5 to PCF on the other hand allows for the alter of light propagation characteristic achieving unconventional propagation properties, such as endlessly single-mode guidance [24,25] by adjusting the geometry of the air holes and spacing between air holes, or substantial interaction between the light guided along the optical fiber and surrounding medium for refractive index sensing by for example using a very small core PCF for propagating large evanescent field [26,27].…”

Section: Overview Of Optical Fiber Sensormentioning

confidence: 99%

Design and analysis of solid-core microstructured optical fiber sensors for sensing surrounding refractive index and surrounding temperature

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The microhole collapsing effect technique is a relatively simple fabrication process that produces Photonic Crystal Fiber (PCF) refractometer using modal interferometry in the range of 10 −5 refractive index resolution. The repeatable method preserves the same 125 µm structural integrity of the optical fiber for various applications such as multi-parameter sensing and bioaffinity. Compared to previous reports for conventional strain or temperature sensing using a single microbubble, the use of two microbubbles in the in-line microbubble structure significantly increases the light-molecule interaction for developing ultralow concentration biosensor. It has also been demonstrated as a potential reusable and label-less PCF biosensor platform. For temperature sensing, another lowcomplexity approach for fabricating a PCF directional coupler structure, without costly masking or precision marking laser, is also discussed. Numerical simulations have also been investigated on the PCF directional coupler structure to validate experimental result and on the microfluidic optical fiber device to rapidly find optimal fabrication-sensitivity design.

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Cladding Modes Analysis of Photonics Crystal Fiber for Refractive Index Sensors Using Finite Element Method

Cited by 2 publications

References 5 publications

Numerical Approach to Modeling and Characterization of Refractive Index Changes for a Long-Period Fiber Grating Fabricated by Femtosecond Laser

Numerical Approach to Modeling and Characterization of Refractive Index Changes for a Long-Period Fiber Grating Fabricated by Femtosecond Laser

Design and analysis of solid-core microstructured optical fiber sensors for sensing surrounding refractive index and surrounding temperature

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