High sensitivity D-shaped hole fiber temperature sensor based on surface plasmon resonance with liquid filling

Abstract

A high sensitivity D-shaped hole double-cladding fiber temperature sensor based on surface plasmon resonance (SPR) is designed and investigated by a full-vector finite element method. Within the D-shaped hole doublecladding fiber, the hollow D-section is coated with gold film and then injected in a high thermo-optic coefficient liquid to realize the high temperature sensitivity for the fiber SPR temperature sensor. The numerical simulation results show that the peaking loss of the D-shaped hole double-cladding fiber SPR is hugely influenced by the distance between the D-shaped hole and fiber core and by the thickness of the gold film, but the temperature sensitivity is almost insensitive to the above parameters. When the thermo-optic coefficient is −2.8 × 10 −4 ∕°C, the thickness of the gold film is 47 nm, and the distance between the D-shaped hole and fiber core is 5 μm, the temperature sensitivity of the D-shaped hole fiber SPR sensor can reach to −3.635 nm∕°C.

High temperature-sensitivity sensor based on long period fiber grating inscribed with femtosecond laser transversal-scanning method

“…Optical fiber sensors exhibit many features such as immunity to electromagnetic interference, high sensitivity, small size, low back-reflection, low cost, and multiplexing capabilities, which have attracted increasing attention in the sensing fields, including monitoring temperature, strain, bending, and refractive index [1][2][3][4] . Recently, various sensors for temperature sensing based on the long period fiber gratings (LPFGs) [5,6] , fiber Bragg gratings (FBGs) [7] , Mach-Zehnder interferometers (MZIs) [8] , Fabry-Perot interferometers (FPIs) [9] , Saganac [10] , D-shaped fibers [11] , and other types of sensors [12,13] have been developed. The temperature sensitivity of the LPFG depends mainly on the thermo-optic coefficient and thermal expansion coefficient of fiber materials, as well as the order cladding modes [14] .…”

A Highly Magnetic Field Sensitive Photonic Crystal Fiber Based on Surface Plasmon Resonance

“…The confinement loss is the main factor affecting the loss spectrum, which can be calculated by the imaginary part of the effective refractive index of the mode. The formula is as follows [ 34 ]: …”

Design of on-chip hybrid plasmonic Mach-Zehnder interferometer for temperature and concentration detection of chemical solution

“…In recent years, various optical fiber-based device configurations, e.g. fibers with Bragg gratings [12,13], in-line interferometer [14,15], graphene assisted microfiber interferometer [16], surface plasmon resonance (SPR) supported fiber sensors [17,18], and modal interferometers in microstructured optical fibers (MOFs) [15,19] have been developed and investigated for temperature monitoring. However, on-chip integrated optical temperature sensors based on ring resonators [20,21], Fabry-Perrot cavities [22], Bragg reflectors [23,24], and interferometers [25,26] have also been demonstrated and are envisaged to be favorable candidates for integration with electronic circuits for lab-on-a-chip information processing and calibration compared with their fiber-optic siblings.…”