Interest in polymer optical fiber Bragg gratings (POFBGs) arises from the different material properties and sensing modalities brought by polymers relative to silica. Polymer fibers typically offer twice sensitivity temperature of conventional silica increased strain overall. In addition, have higher elastic limits as a result larger range operation for physical constraints. While some are effectively humidity insensitive, others present inherent sensitivity. Their organic also allow variety...

A novel and highly sensitive liquid level sensor based on a polymer optical fiber Bragg grating (POFBG) is experimentally demonstrated. Two different configurations are studied both show the potential to interrogate by measuring strain induced in POFBG embedded silicone rubber diaphragm, which deforms due hydrostatic pressure variations. The exhibits linear response over sensing range good repeatability. For comparison, similar using FBG inscribed silica fabricated, displays sensitivity that...

Present study demonstrates the fiber-optic localized surface plasmon resonance (LSPR) based sensitive biosensor for detection of Shigella bacterial species. The proposed sensor is comprised multi-core fiber (MCF) having seven cores arranged in a hexagonal shape and spliced with single-mode (SMF) efficient detection. An increase evanescent waves (EWs) coupling modes between MCF was achieved by etching process controlled manner. also increases refractive index sensitivity (RIS) sensor....

Abstract This paper presents the development and application of a multiparameter, quasi-distributed smart textile based on embedded highly stretchable polymer optical fiber (POF) sensors. The POF is fabricated using light polymerization spinning process, resulting fiber, so-called LPS-POF, with Young’s modulus elastic limits 15 MPa 17%, respectively. differential scanning calorimetry shows thermal stability LPS-POF in temperature range 13–40 °C. developed sensors are power variation, which...

The purpose of this article is to propose an optical fiber sensor probe based on the localized surface plasma resonance (LSPR) technique for detection creatinine in aquaculture. sensing functionalized through use gold nanoparticles (AuNPs), niobium carbide (Nb2CTx) MXene, and creatinase (CA) enzyme. intrinsic total internal reflection (TIR) mechanism modified increase evanescent field intensity using a heterogeneous core mismatch tapering structure (i.e., convex fiber-tapered seven...

Alanine aminotransferase (ALT), a critical component of human blood, is inextricably associated with liver injury. The current study develops novel biosensor based on the localized surface plasmon resonance (LSPR) principle for detection ALT analytes at concentrations ranging from 0 to 1000 Units per liter (U/L). According authors' knowledge, this first time an optical fiber structure taper-in-taper has been developed biosensing applications. It fabricated using three-electrode semi-vacuum...

This paper presents the development and feasibility tests of a cortisol immunosensor. The sensor is based on surface plasmon resonance (SPR) using an unclad plastic optical fiber (POF) in which SPR used as sensitivity enhancer, promoted by gold/palladium (AuPd) alloy coating. AuPd coated fibers were functionalized with anti-cortisol antibody passivated bovine serum albumin (BSA) to be tested presence target analyte. antibody-antigen binding reaction caused variation refractive index coating,...

In this work, a localized plasmon-based sensor is developed for para-cresol (p-cresol) - water pollutant detection. A nonadiabatic [Formula: see text] of tapered optical fiber (TOF) has been experimentally fabricated and computationally analyzed using beam propagation method. For optimization sensor's performance, two probes are proposed, where probe 1 immobilized with gold nanoparticles (AuNPs) 2 the AuNPs along zinc oxide (ZnO-NPs). The synthesized metal nanomaterials were characterized by...

This paper presents the development of a bioinspired multifunctional flexible optical sensor (BioMFOS) as an ultrasensitive tool for force (intensity and location) orientation sensing. The structure is in orb webs, which are devices prey capturing vibration transmission. feature achieved by using transparent resins that present both mechanical properties structural integrity strain/deflection transmission well signal with core/cladding configuration waveguide. In this case, photocurable...

Measuring cortisol levels as a stress biomarker is essential in many medical conditions associated with high risk of metabolic syndromes such anxiety and cardiovascular diseases, among others. One technology that has growing interest recent years fiber optic biosensors enable ultrasensitive detection. Such allied progress being achieved basic interrogation, accuracy improvements, novel applications. The development improved monitoring, simplified manufacturing process, reproducibility, low...

Glucose, an essential nutrient to the metabolism of organisms, is closely related human health. Here, a novel serial quadruple tapered structure-based localized surface plasmon resonance (LSPR) sensor employed achieve accurate detection glucose level in body. Gold nanoparticles (AuNPs) are immobilized on taper fiber (SQTF) induce LSPR. Furthermore, graphene oxide (GO) and multi-wall carbon nanotubes (MWCNTs) used increase binding sites enzymes improve sensing performance probe. In our work,...

In this work, authors have developed a portable, sensitive, and quick-response fiber optic sensor that is capable of detection Aflatoxins B1 (AFB1) quantitatively qualitatively. Using multi-mode (MMF) multi-core (MCF), the MMF-MCF-MCF-MMF structure based on symmetric transverse offset splicing waist-expanded taper fabricated. The evanescent waves are enhanced to form strong field by etching surface with hydrofluoric acid. To successfully excite localized plasmon resonance phenomenon, gold...

Histamine is a biologically active molecule that serves as reliable predictor of the quality fish. In this work, authors have developed novel humanoid-shaped tapered optical fiber (HTOF) biosensor based on localized surface plasmon resonance (LSPR) phenomenon to detect varying histamine concentrations. experiment, and distinctive tapering structure has been using combiner manufacturing system contemporary processing technologies. Graphene oxide (GO)/multi-walled carbon nanotubes (MWCNTs) are...

The development of a p-cresol biosensor for aquaculture, marine life, and healthcare applications is described in this study. based on localized surface plasmon resonance (LSPR) employs novel tapered-in-tapered fiber (TiTF) probe. Gold nanoparticles (AuNPs) copper oxide nanoflowers (CuO-NFs) TiTF structures are immobilized developed probe's performance was evaluated by measuring the response to variety solution concentrations. Combining AuNPs CuO-NFs improves sensitivity anti-interference...

Optical fiber sensors show potential for monitoring multiple parameters essential to the growth and health of fish, particularly pH value aquaculture medium. Two types optical sensors, using tapered silica single mode fibers with a Bragg grating inscribed D-shaped plastic (home-made reused) were produced. A pH-sensitive layer made polyaniline (PANI) was deposited on fibers' surface. The demonstrated reproducibility repeatability sensitivity −0.22 ± 0.02 dB/pH, −472 9 Counts/pH, −(26 2) × 102...

Aflatoxins are a kind of fungal toxin that causes great damage to humans and animals due its wide distribution, secretive nature, high toxicity. For the purpose achieving qualitative quantitative detection aflatoxin B1 (AFB1), novel tri-taper-in-taper fiber-optic structure based on core mismatch four-core fiber with multimode fiber-based WaveFlex biosensor is developed tested. The sensor probe's surface coated gold nanoparticles (AuNPs). Multi-walled carbon nanotubes zinc oxide sequentially...

In this work, a combination of simulation and experiment is used to analyze the distribution evanescent field in W-shaped optical fiber. A novel flexible fiber (FWOF) biosensor based on localized surface plasmon resonance (LSPR) effect (also known as WaveFlex biosensor) designed fabricated for detecting histamine food. First, gold nanoparticles (AuNPs) are immobilized FWOF probe's excite LSPR effect. Second, niobium carbide (Nb <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML"...

With the advantages of high flexibility, strong real-time monitoring capabilities, and convenience, wearable devices have shown increasingly powerful application potential in medical rehabilitation, health monitoring, Internet Things, human–computer interaction. In this paper, we propose a novel optical microfiber intelligent sensor based on wavy-shaped polymer (WPOMF) for cardiorespiratory behavioral humans. The fibers materials are prepared into microfibers, fully using material...

There is a strong and growing need to monitor stress biomarkers in human beings animals for real-time wellness assessment, which key indicator of health. Toward this, we report an optical fiber immunosensor based on laser-induced graphene (LIG) the potential quantification monitoring cortisol hormone. The developed sensors were created using Fabry-Pérot cavity principle. cavities filled with polyimide (PI) and, some cases, PI mixed gold nanoparticles. interferometers tested temperature...