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Graphene-based long period grating fiber sensor as detector of metallic impurities in composite materials

I. S. DONTU1, D. SAVASTRU1,* , V. SAVU1, D. TENCIU1, A. STANCIU1

Affiliation

  1. National Institute R&D of Optoelectronics INOE 2000, 409 Atomistilor Str., Magurele, 077125, Ilfov, Romania

Abstract

In this paper we report results on simulation of a fibre optic sensors class of potential interest for various chemical sensing applications, namely Long Period Grating Fibre Sensors (LPGFS) having a graphene layer deposited on the cladding in the grating zone. Studied LPGFS consists of single mode (SM) fused silica optical fibre onto/into which a grating with 10 µm to 1000 µm is inscribed over a 5 mm to 75 mm length zone. In this zone the PMMA protection layer is removed creating a direct contact of the optic fibre with the ambient medium. The sensing capabilities of LPGFS are greatly improved by deposition of a graphene (G) layer, a two-dimensional carbon material on this optic fibre cladding zone..

Keywords

Composite material, Graphene layer, Long period grating fibre sensors (LPGFS).

Submitted at: April 2, 2025
Accepted at: April 15, 2025

Citation

I. S. DONTU, D. SAVASTRU, V. SAVU, D. TENCIU, A. STANCIU, Graphene-based long period grating fiber sensor as detector of metallic impurities in composite materials, Journal of Optoelectronics and Advanced Materials Vol. 27, Iss. 3-4, pp. 113-120 (2025)