Title: Ambient refractive index sensitivity of long-period fiber grating (LPFG) with reduced cladding thickness using three-layer fiber geometry approach.
Authors: Prashar, Shivendu; Singh, Sartajvir; Sood, Vishakha; Sharma, Sandhya
Abstract: This article presents the refractive index (RI) sensitivity study of cladding reduced uniform long-period fiber grating. The displacement of resonant wavelength with the change in ambient RI is observed to inspect the sensitivity. Here, the grating period is fixed at a value (550 μm) to analyze RI sensitivity of cladding modes (HE13-HE14). However, it varies in earlier mathematical studies to adjust the resonant wavelength of all modes at a specific wavelength. The three-layer fiber geometry-based mathematical approach is employed to estimate the core and cladding modes. The obtained results support decline in quantity of cladding modes sustained by a single-mode fiber. The decrease in cladding radius has shown enhancement in RI sensitivity. For a reduction of 22 μm in cladding radius, the highest ordered HE14 cladding mode has shown 5.8 times improvement in its sensitivity.
Subjects: GEOMETRIC modeling; FIBERS; WAVELENGTHS; REFRACTIVE index; GEOMETRY
Publication: Journal of Optical Communications, 2024, Vol 45, Issue 4, p761
ISSN: 0173-4911
Publication type: Academic Journal
DOI: 10.1515/joc-2021-0287

Ambient refractive index sensitivity of long-period fiber grating (LPFG) with reduced cladding thickness using three-layer fiber geometry approach.

Prashar, Shivendu; Singh, Sartajvir; Sood, Vishakha; Sharma, Sandhya