Simulation study of a ZnO-based interferometric sensor on a microstructured GI-MMF fiber for simultaneous detection of temperature and refractive index

Chirped Fiber Bragg Grating-Based Cavity Sensor for Simultaneous Temperature and Refractive Index Sensing

In this work, a compact dual-parameter fiber optic sensor for temperature, refractive index, and label-free biomarker-related measurements is presented. The sensor is based on a chirped fiber Bragg grating cleaved inside the grating region, leaving residual grating lengths of 3 mm, 4 mm, and 5 mm. After cleaving, the r...

Simultaneous measurement of refractive index and temperature using a cascaded core-offset in-line fiber Mach–Zehnder interferometer

In-line fiber Mach–Zehnder interferometers (MZIs) have been widely investigated for refractive index (RI) sensing; however, variations in temperature affect the accuracy of RI measurement due to the thermo-optic effect. In this study, a cascaded core-offset in-line fiber MZI was simulated and experimentally demonstrate...

Design of a gold-nanowire embedded ZBLAN PCF-SPR for ultra-low refractive index sensing

Structural parameter optimization and mode-dependent sensing performance analysis of a D-shaped multimode fiber SPR sensor

The core refractive index of conventional pure SiO2 optical fiber (approximately 1.45) is lower than that of typical industrial lubricating oils (n ≈ 1.47), rendering it incapable of satisfying the phase-matching condition for surface plasmon resonance (SPR) excitation. To address this limitation, this paper proposes a...

Fiber-Optic SPR Sensor Based on MMF-SMF-MMF Structure for Detection of Compositional Variations in Diesel Fuel

The article presents a fiber-optic surface plasmon resonance sensor based on a multimode–single-mode–multimode fiber structure for detecting compositional variations and differentiating diesel fuel grades. The sensor design, modelling approach, and experimental implementation are described. To enhance the sensitivity a...

Design and analysis of an ultra-high sensitivity quasi-D-shaped SPR photonic crystal fiber sensor for chemical and industrial liquid detection