Browsing by Author "Revathi, R."

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    Circular-Pattern Photonic Crystal Fiber for Different Liquids with High Effective Area and Sensitivity
    (Springer New York LLC, 2019) Revathi, R.; Soni, A.; Bir, K.; Senthil, R.; Krishnan, P.
    A solid core photonic crystal fiber (PCF) is preferred to signify the work of circular-pattern PCF for chemical identifying motive. Finite element method is used to obtain several properties of PCF. Various computations are applied to numerically explore the use of PCF for sensing justifications at different wavelengths ranging between 1.4 and 1.65 ?m. The solid core is filled with liquid glycerol (n = 1.4722), ethanol (n = 1.354), and toluene (n = 1.4968), and on applying various geometric parameters of the fiber, 65.16%, 61.65%, and 64.05% of sensitivity are observed respectively. Transmission of heavy data with high speed depends on effective mode area. For glycerol and toluene, the effective area is observed as 2.81 ?m2 and 3.07 ?m2 respectively. Perfectly matched layer is applied in outer most cladding to overcome reflection. Higher sensitivity is observed by this design operating at different wavelengths. Similarly, properties like confinement loss and effective area are also computed. Design containing core material such as glycerol, ethanol, and toluene has been compared by different properties. The core materials employed in this paper are used to analyze the potential of sensors. This PCF can be used in diverse application of bio sensing or sensing related areas. © 2019, Springer Science+Business Media, LLC, part of Springer Nature.
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    Hollow-core high-sensitive photonic crystal fiber for liquid-/gas-sensing applications
    (Springer Science and Business Media Deutschland GmbH, 2021) Revathi, R.; Anand, U.; Krishnan, P.
    A low confinement loss of hollow-core photonic crystal Fiber (HC-PCF) for liquid-/gas-sensing applications has been proposed. Various HC-PCF backgrounds such as silica, BK7 and Teflon glass with different core materials such as glycerol, benzene and toluene have been studied using a finite element method with perfectly matched layer-based COMSOL software. The performance of the proposed PCF is analyzed using different metrics such as confinement loss, effective area, numerical aperture, relative sensitivity and effective refractive index for different combinations to compare the effects of different backgrounds in HC-PCF. The proposed HC-PCF structure offers relative sensitivity of 91.96% and 1.74 × 10?14 dB/m of confinement loss using Teflon glass as the substrate for benzene. The proposed PCF can be used for liquid- and gas-sensing applications with its low confinement loss and high sensitivity. The proposed simple cladding structure is easy to fabricate and offers 26% improved relative sensitivity compared to existing PCFs in the literature. © 2021, The Author(s), under exclusive licence to Springer-Verlag GmbH, DE part of Springer Nature.