Dey, Tanoy Kumar and Roy, Arpan and Biswas, Palas and Basumallick, Nandini and Bandyopadhyay, Somnath (2022) Investigations on the add-layer sensitivity near mode transition of a stretched mode long period fiber grating. Optical Fiber Technology, 72. Art No-102969. ISSN 1068-5200

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Abstract

The influence of the spectral separation between two consecutive resonant cladding modes of long period fiber grating (LPFG) on the add-layer sensitivity around mode transition (MT) has been investigated with a view to enumerating the dependency of the sensitivity on the separation between the resonant wavelengths of cladding modes. The separation between two consecutive resonant modes was increased or stretched by etching, and the specific mode of interest was brought to the MT region by the deposition of electrostatic self-assembled (ESA) layers of polymeric material on the sensor surface. The add-layer sensitivity of the mode-stretched LPFG (MSLPFG) operating around the linear part of the MT region was found to be similar to 2.59 nm(WL)/nm(TH). The result was found to be superior almost by 1.7 times as compared to a similar LPFG sensor at MT, but without mode stretching. Theoretical modelling has also been shown to corroborate the experimental results.

Item Type:	Article
Subjects:	Processing Science
Divisions:	Fiber Optics and Photonics
Depositing User:	Bidhan Chaudhuri
Date Deposited:	29 Aug 2023 10:25
Last Modified:	29 Aug 2023 10:25
URI:	http://cgcri.csircentral.net/id/eprint/5443

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