A simple plastic optical fiber (POF) based surface plasmon resonance (SPR) sensor is proposed and demonstrated for simultaneous measurement of refractive index (RI) temperature. The consists a series V-grooves along the POF side-polish structure at other side fiber. V-groove can alter SPR excitation angle act as mode filter, effectively enhancing effect narrowing wavelength width. After coating layer thermosensitive material-polydimethylsiloxane (PDMS) film on half part probe, dual-parameter...

A novel compact ultra-high sensitivity optical fiber temperature sensor based on surface plasmon resonance (SPR) is proposed and demonstrated. The fabricated by employing a helical-core (HCF), which polished as D-type the region coated with layer of Au-film polydimethylsiloxane (PDMS). theoretical experimental results show that resonant wavelength can be effectively adjusted changing twisting pitch HCF. Due to high refractive index thermo-optic coefficient PDMS, maximum reach -19.56 nm/°C at...

In this work, a plastic optical fiber (POF) based surface plasmon resonance (SPR) sensor is proposed and demonstrated for simultaneous measurement of refractive index (RI) liquid level. The probe fabricated by polishing the POF drilling several micro-holes with equal pitch along axial, after depositing layer gold film on polished region, SPR obtained. effects micro-hole sensing performance are investigated structural parameters micro hole optimized. Experimental results show that changes RI...

In this article, a reflective surface plasmon resonance (SPR) sensor based on multimode fiber (MMF)–hollow core (HCF) structure is proposed for simultaneous measurement of temperature and humidity. Along the HCF, two different films, i.e., polyvinyl alcohol (PVA) film polydimethylsiloxane (PDMS) are coated outer to generate SPR resonances at wavelengths achieve function. order get better sensing performance, length ratio PVA PDMS film, coating times optimized. The experimental results show...

An enhanced plastic optical fiber (POF)-based surface plasmon resonance (SPR) sensor is proposed by employing a double-sided polished structure. The fabricated polishing two sides of the POF symmetrically along with axis, and layer Au film deposited on each side region. SPR can be excited both surfaces coating, number light reflections will increased using this simulation experimental results show that has an effect. visibility full width at half maximum (FWHM) spectrum improved for high...

We demonstrate an optical fiber vector magnetic field sensor based on Mach-Zehnder interferometer by splicing a section of side-polished hollow-core between two sections single-mode fiber. As varied is applied to the fluid encapsulated sandwiched structure, transmission spectra will vary with intensity and direction field. In our experiments, at incident light wavelength around 1510 nm, orientation sensitivity are 180 pm/° 240 pm/mT, respectively. addition, high contrast about 20 dB signal...

In this article, a high-sensitivity surface plasmon resonance (SPR) sensor based on multimode fiber (MMF)-tapered hollow core (THCF)-MMF structure is fabricated and proposed for refractive index (RI) sensing. As the measurement RI increases, SPR peak right shifts, interference (MMI) spectrum will also appear in visible wavelength front of peak, MMI left shifts with increases. The changes can be detected by monitoring difference between which new method used to measure RI. sensing performance...

This article proposes and demonstrates an optical fiber vector magnetic field sensor based on magnetofluid-encapsulated polarization-maintaining (PMF) single-end offset fusion spliced hollow-core (HCF) structure. Thanks to the unique fast slow axes structure of PMF, when two are fused with HCF, respectively, exhibits different responses variation surrounding sensing Experimental results reveal that at a dislocation <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML"...

This paper presents a surface plasmon resonance (SPR) sensor based on dual-hole optical fiber, designed for the simultaneous measurement of refractive index (RI) and temperature. The is fabricated by side-polishing fiber coating gold silver films in left right holes, respectively. Additionally, hole filled with polydimethylsiloxane to enable dual-parameter detection. We analyzed sensor’s performance using finite element analysis software COMSOL, results indicate peak sensitivity reaching...

We propose a compact ultrasensitive gas pressure sensor based on two cascaded fiber Mach-Zehnder interferometers (MZIs) with Vernier effect. Each MZI is composed of hollow core (HCF) sandwiched in between short multimode fibers. The lengths the HCFs MZIs are set little different order to generate an envelope transmission spectrum structure for effect sensing. HCF one opened make air hole connect external environment and act as sensing element. other kept closed serving reference have quite...

We proposed a high sensitivity long-period fiber grating strain and temperature sensor. The sensor is composed of input single mode (SMF), helical capillary optical (HCOF), output SMF in cascade. By using fusion junction structure between HCOF, almost all the light from can be coupled to silica cladding then modulated by HCOF. Because propagates same channel as insensitive refractive index (RI) change but has stress temperature. experiment results show that reach -9.29 pm/μ ε when hollow air...

The chiroptical response of the chiral metasurface can be characterized by circular dichroism, which is defined as absorption difference between left-handed circularly polarized incidence and right-handed incidence. It applied in biology, chemistry, optoelectronics, etc. Here, we propose a dynamically tunable structure, composed two metal split-ring resonators graphene layer embedded dielectric. structure reflects waves absorbs under normal overall unit structural parameters were discussed...

Abstract Field-controlled micromanipulation represents a pivotal technique for handling microparticles, yet conventional methods often risk physical damage to targets. Here, we discovered completely new mechanism true noncontact manipulation through photothermal effects, called thermal-optical tweezers. We employ laser self-assembly waveguide (PTW) dynamic microparticle manipulation. This demonstrates superior conversion and precision control, generating nonisothermal temperature field. The...

We present a theoretical and experimental investigation on refractive index (RI) sensing characteristics of single mode fiber (SMF) based modal interferometers. Theoretical analysis reveals that interference between different modes in an SMF has quite response to the RI variation external medium. The core lower order cladding negative sensitivity whereas higher modes, or two have positive sensitivity. A single-mode-multimode-single-mode (SMS) Michelson interferometer with large-core...

We proposed a refractive index (RI) sensor employing two twisted tapered plastic optical fibers (POFs). The POFs were fabricated by heating and drawing method around each other to form coupled structure. consisted of input ports, region, output ports. POF could make the light couple from one easily. constitute self-referencing sensor, monitoring changes coupling ratio, variations external medium RIs be measured. RI sensing performances for sensors with different fiber diameters region...

A high sensitivity and easily fabricated liquid level sensor based on the V-groove structure plastic optical fiber (POF) was described. In design, POF is produced by using a die-press-print method, which effectively reduces complexity of fabrication process makes it easier for mass production sensors. This greatly enhances usefulness proposed in cost effective sensing applications. The transmission characteristic could be changed when immerged or emerged rising falling liquid. performances...

Due to their unique operational flexibility and ability facilitate functional integration, the fascinating application of optical fibers has recently attracted significant attention in field tweezers manipulation. The traditional fiber (OFTs) can easily trap microparticles front or side trapping tool, instead behind. Herein, we propose demonstrate a novel capillary tweezer (COFT) break limitation direction extend spatial range trapping. device consists cascade structure single-mode (COF),...

In this work, a simple side-polish plastic optical fiber (POF)-based surface plasmon resonance (SPR) sensor is proposed and demonstrated for simultaneous measurement of refractive index (RI) liquid level. The effects depths on the sensing performance were studied. experimental results show that SPR peak wavelength will be changed as RI changes, intensity with level variation. By monitoring changes in intensity, can detected simultaneously. Experimental an sensitivity 2008.58 nm/RIU reached...

In this paper the influences of structured parameters, namely, metal layer thickness, polished depth, macrobending radius and angle on refractive index sensing performances for side-polished plastic optical fibers (POFs) based surface plasmon resonance (SPR) sensors were investigated. A simple controllable rotary grinding technique was introduced to fabricate proposed sensor. The sensitivity, resolution full width at half maximum (FWHM) evaluated. results have demonstrated that SPR sensor...