Bandyopadhyay, Sankhyabrata and Biswas, Palas and Chiavaioli, Francesco and Dey, Tanoy Kumar and Basumallick, Nandini and Trono, Cosimo and Giannetti, Ambra and Tombelli, Sara and Baldini, Francesco and Bandyopadhyay, Somnath (2017) Long-period fiber grating: a specific design for biosensing applications. Applied Optics, 56 (35). pp. 9846-9853. ISSN 0003-6935

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In this paper, a detailed investigation on the modeling of long-period fiber grating (LPFG) sensors is discussed with the aim of providing a more realistic solution for their use in biosensing. Add-layer sensitivity, i.e., sensitivity of the sensor to an additional layer adhered onto the fiber surface, is quantified and a clear and complete analysis about the influence of the average thickness of the deposited biological sensing layers, as well as the change in refractive index of these layers, on the resonant wavelength of the cladding modes of an LPFG is provided. Add-layer sensitivity of LPFG sensors close to mode transition (MT) and also at turn-around point (TAP) are taken into account. Adsorbed layer thicknesses, as estimated from measured wavelength shifts of the LPFG, are found to have a good match with the values obtained through other measurement techniques. (C) 2017 Optical Society of America

Item Type: Article
Subjects: Processing Science
Divisions: Fiber Optics and Photonics
Depositing User: Bidhan Chaudhuri
Date Deposited: 19 Jan 2018 07:03
Last Modified: 19 Jan 2018 07:03

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