Fabrication and Characterization of Polycarbonate Microstructured Polymer Optical Fibers for High-Temperature-Resistant Fiber Bragg Grating Strain Sensors
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Polymer Processing and Manufacturing Engineer Nushores
Polymer Processing and Manufacturing Engineer NuShores’ mission is to improve the quality of life for people globally while competing successfully by applying its licensed and internally developed advanced materials portfolio to the Biomaterials industry. NuShores has exclusive global license to patented bone and tissue regeneration technologies developed at University of Arkansas – Little Rock from over $12M in research. We are seeking a Polymer Processing and Manufacturing Engineer to Join our growing team to launch NuCress™ scaffold product family, our award-winning bone void filler line of medical device products. If working with a smart and creative team that designs and builds products that improve quality of life interests you, then consider a career with us. Job Type. Full-time professional employee. Reports To. The Polymer Process and Manufacturing Engineer will report to Chief Technical Officer, Chief Scientist or Product Manager. Salary. Competitive, with benefits. Job Overview. The Polymer Processing and Manufacturing Engineer will be the technical lead for new and existing processes that involve the integration of polymeric biomaterials to biological systems and products such as artificial bone and tissue medical devices. This role is responsible for concept development, equipment design and installation, vendor management, and process development and optimization for small to large-scale manufacturing readiness. A key focus for the Polymer Processing and Manufacturing Engineer is to lead process engineering to create and maintain a manufacturing line/facility. Additionally he/she will provide technical subject matter expertise in polymer structure-property relationships, catalyst, polymerization and to develop and maintain know-how and intellectual property within their relevant area of expertise to support regulatory and business objectives and sustain future growth. -
High-Efficiency Inscription of Fiber Bragg Grating Array with High-Energy Nanosecond-Pulsed Laser Talbot Interferometer
sensors Letter High-Efficiency Inscription of Fiber Bragg Grating Array with High-Energy Nanosecond-Pulsed Laser Talbot Interferometer Zhe Zhang 1,2, Baijie Xu 1,2, Jun He 1,2,3,* , Maoxiang Hou 1,4, Weijia Bao 1,2,3 and Yiping Wang 1,2,3 1 Guangdong and Hong Kong Joint Research Centre for Optical Fiber Sensors, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China; [email protected] (Z.Z.); [email protected] (B.X.); [email protected] (M.H.); [email protected] (W.B.); [email protected] (Y.W.) 2 Guangdong Laboratory of Artificial Intelligence and Digital Economy (SZ), Shenzhen University, Shenzhen 518060, China 3 Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen 518060, China 4 School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510006, China * Correspondence: [email protected]; Tel.: +86-755-2672-8702 Received: 17 June 2020; Accepted: 30 July 2020; Published: 1 August 2020 Abstract: A high-energy nanosecond-pulsed ultraviolet (UV) laser Talbot interferometer for high-efficiency, mass production of fiber Bragg grating (FBG) array was experimentally demonstrated. High-quality FBG arrays were successfully inscribed in both H2-free and H2-loaded standard single-mode fibers (SMFs) with high inscription efficiency and excellent reproducibility. Compared with the femtosecond pulse that had a coherent length of several tens of micrometers, a longer coherent length (~10 mm) of the employed laser rendered a wider FBG wavelength versatility over 700 nm band (1200–1900 nm) without the need for optical path difference (OPD) compensation. -
Fiber Bragg Grating Technology Fundamentals and Overview Kenneth O
JOURNAL OF LIGHTWAVE TECHNOLOGY, VOL. 15, NO. 8, AUGUST 1997 1263 Fiber Bragg Grating Technology Fundamentals and Overview Kenneth O. Hill and Gerald Meltz, Member, IEEE (Invited Paper) Abstract— The historical beginnings of photosensitivity and the cladding with two intersecting beams of UV light; now, the fiber Bragg grating (FBG) technology are recounted. The basic period of the interference maxima and the index change was techniques for fiber grating fabrication, their characteristics, and set by the angle between the beams and the UV wavelength the fundamental properties of fiber gratings are described. The many applications of fiber grating technology are tabulated, and rather than by the visible radiation which was launched into some selected applications are briefly described. the fiber core. Moreover, the grating formation was found to be orders-of-magnitude more efficient. Index Terms—Bragg gratings, optical fiber devices, optical fiber dispersion, optical fiber filters, optical fiber sensors, optical planar At first, the observation of photo-induced refractivity in waveguides and components, photosensitivity. fibers was only a scientific curiosity, but over time it has become the basis for a technology that now has a broad and important role in optical communications and sensor systems. I. INTRODUCTION Research into the underlying mechanisms of fiber photosen- FIBER Bragg grating (FBG) is a periodic perturbation sitivity and its uses is on-going in many universities and Aof the refractive index along the fiber length which industrial laboratories in Europe, North and South America, is formed by exposure of the core to an intense optical Asia, and Australia. Several hundred photosensitivity and fiber interference pattern. -
Fabrication and Applications of Fiber Bragg Grating- a Review
Adv. Eng. Tec. Appl. 4, No. 2, 15-25 (2015) 15 Advanced Engineering Technology and Application An International Journal http://dx.doi.org/10.12785/aeta/040202 Fabrication and Applications of Fiber Bragg Grating- A Review Sanjeev Dewra1, Vikas2 and Amit Grover2,∗ SBSSTC Ferozepur, Punjab, 152004, India Received: 24 Sep. 2014, Revised: 17 Mar. 2015, Accepted: 19 Mar. 2015 Published online: 1 May 2015 Abstract: In this paper, the brief introduction of Fiber Bragg Grating, its significant applications, sensing principles, properties, fabrication and the basic designing of FBG have been discussed. FBG’s are relatively simple to manufacture, small in dimension, low cost and exhibits good immunity from the electromegnatic radiations. The former inceptions and the essential techniques of fiber Bragg grating fabrication are described. This paper presents a comprehensive and systematic overview of FBG technology. Keywords: Fiber Bragg grating, Current applications of Fiber Bragg Grating, Fiber Bragg Grating sensors. 1 Introduction A Fiber Bragg Grating is revealing the core of SMF to a periodic model of passionate ultra violet light. The spotlight generates a stable increase in the refractive index of the core of fiber to produce a fixed index modulation in the direction of the exposure pattern and this fixed index modulation is known as grating. At each periodic refraction small amount of light is reflected. When the grating period is about half the input wavelength of light, all the reflected light signals merge comprehensibly to Fig. 1: Fiber Bragg grating in optical fiber[3] one large reflection at a specific channel. This is known as the Bragg condition. -
Research Progress on Conducting Polymer-Based Biomedical Applications
applied sciences Review Research Progress on Conducting Polymer-Based Biomedical Applications Yohan Park 1, Jaehan Jung 2,* and Mincheol Chang 3,4,5,* 1 School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA; [email protected] 2 Department of Materials Science and Engineering, Hongik University, Sejong 30016, Korea 3 Department of Polymer Engineering, Graduate School, Chonnam National University, Gwangju 61186, Korea 4 School of Polymer Science and Engineering, Chonnam National University, Gwangju 61186, Korea 5 Alan G. MacDiarmid Energy Research Institute, Chonnam National University, Gwangju 61186, Korea * Correspondence: [email protected] (J.J.); [email protected] (M.C.); Tel.: +82-62-530-1771 (M.C.) Received: 23 February 2019; Accepted: 10 March 2019; Published: 14 March 2019 Abstract: Conducting polymers (CPs) have attracted significant attention in a variety of research fields, particularly in biomedical engineering, because of the ease in controlling their morphology, their high chemical and environmental stability, and their biocompatibility, as well as their unique optical and electrical properties. In particular, the electrical properties of CPs can be simply tuned over the full range from insulator to metal via a doping process, such as chemical, electrochemical, charge injection, and photo-doping. Over the past few decades, remarkable progress has been made in biomedical research including biosensors, tissue engineering, artificial muscles, and drug delivery, as CPs have been utilized as a key component in these fields. In this article, we review CPs from the perspective of biomedical engineering. Specifically, representative biomedical applications of CPs are briefly summarized: biosensors, tissue engineering, artificial muscles, and drug delivery. -
Dual Wavelength Differential Detection of Fiber Bragg Grating Sensors with a Pulsed DFB Laser
sensors Article Dual Wavelength Differential Detection of Fiber Bragg Grating Sensors with a Pulsed DFB Laser François Ouellette * , Zhonghua Ou and Jianfeng Li State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China (UESTC), Chengdu 610054, China; [email protected] (Z.O.); [email protected] (J.L.) * Correspondence: [email protected] Received: 15 July 2020; Accepted: 21 August 2020; Published: 24 August 2020 Abstract: We show how dual wavelength differential detection can be used to measure fiber Bragg grating sensors using nanosecond pulses from a single DFB laser diode, by taking advantage of its dynamic chirp. This can be performed in two ways: by measuring the reflected power from two separate pulses driven by two different currents, or by taking two delayed digitized samples within a single pulse. A prototype instrument using fast digitizing and processing with an FPGA is used to characterize the chirp, from which the performance can be optimized for both measurement schemes. Keywords: fiber Bragg grating; fiber optic sensor; dynamic chirp; DFB laser 1. Introduction Fiber Bragg grating (FBG) sensors have been used for three decades now [1], in applications as varied as aircraft wing shape measurements [2], temperature monitoring in medical treatments [3], pressure and temperature sensing in oil wells [4], or strain sensing in biomechanics [5]. FBG sensors have traditionally been measured either with a combination of a broadband optical source and a spectrometer, or a wavelength-swept source and a photodiode [1]. Both techniques involve acquiring a set of data points covering the entire range of wavelengths potentially reached by the sensor. -
POLYMER-PLASTICS TECHNOLOGY and ENGINEERING June 1999 Aims and Scope
rJ 31 CY Ls dM F4 B cnY 0 cc z=8 OE 0 U POLYMER-PLASTICS TECHNOLOGY AND ENGINEERING June 1999 Aims and Scope. The joumal Polymer-Plastics Technology and Engineering will provide a forum for the prompt publication of peer-reviewed, English lan- guage articles such as state-of-the-art reviews, full research papers, reports, notes/communications, and letters on all aspects of polymer and plastics tech- nology that are industrial, semi-commercial, and/or research oriented. Some ex- amples of the topics covered are specialty polymers (functional polymers, liq- uid crystalline polymers, conducting polymers, thermally stable polymers, and photoactive polymers), engineering polymers (polymer composites, polymer blends, fiber forming polymers, polymer membranes, pre-ceramics, and reac- tive processing), biomaterials (bio-polymers, biodegradable polymers, biomed- ical plastics), applications of polymers (construction plastics materials, elec- tronics and communications, leather and allied areas, surface coatings, packaging, and automobile), and other areas (non-solution based polymerization processes, biodegradable plastics, environmentally friendly polymers, recycling of plastics, advanced materials, polymer plastics degradation and stabilization, natural, synthetic and graft polymerskopolymers, macromolecular metal com- plexes, catalysts for producing ultra-narrow molecular weight distribution poly- mers, structure property relations, reactor design and catalyst technology for compositional control of polymers, advanced manufacturing techniques and equipment, plastics processing, testing and characterization, analytical tools for characterizing molecular properties and other timely subjects). Identification Statement. Polymer-Plastics Technology and Engineering is pub- lished five times a year in the months of February, April, June, September, and November by Marcel Dekker, Inc., P.O. Box 5005, 185 Cimarron Road, Monti- cello, NY 12701-5185. -
Department Wise Specialization
Department wise Specialization 1 Applied Geology: Petroleum Geology, Coal Geology, Structural Geology, Mathematical Geology, Geostatistics, Sedimentology and Sequence Stratigraphy, Geomorphology, Quaternary Geology, Neotectonics, Paleontology, Organic Geochemistry, Igneous, Metamorphic Petrology, Marine Geology, Economic Geology, Mineral Exploration, Engineering Geology, Hydrogeology, Remote Sensing and GIS, Nanotechnology in Geosciences, Artificial Intelligence (AI) and Machine Learning (ML) in Geosciences. 2 Applied Geophysics: Earth and Planetary Science, Gravity and Magnetic Methods, Geophysical Signal Processing, Seismic Methods, Well Logging, Electromagnetic Methods, Electrical Methods, Remote Sensing, Seismology, Magneto-telluric Methods, Atmospheric Sciences, Marine Geophysics and Physical Oceanography. 3 Chemical Engineering: Process Systems Engineering and Control, Transport and Separation Processes Modelling and Simulation, Chemical Engineering Thermodynamics, Petroleum Refining and Petrochemicals, Polymer Engineering, Energy Systems Engineering, Coal to Chemicals, Process Integration, Process and Equipment Design, Molecular Simulation, Electrochemical Engineering Membrane Science & Engineering, Industrial, Occupational & Process Safety, Advance Materials, Colloids & Interface Science, Multiphase Reactors 4 Chemistry: Physical Chemistry, Theoretical Chemistry, Computational Chemistry, Medicinal Chemistry, Organic Chemistry, Inorganic Chemistry, Analytical Chemistry, Biochemistry, Pharmaceutical Science / Engineering. 5 Civil -
Glossary of Materials Engineering Terminology
Glossary of Materials Engineering Terminology Adapted from: Callister, W. D.; Rethwisch, D. G. Materials Science and Engineering: An Introduction, 8th ed.; John Wiley & Sons, Inc.: Hoboken, NJ, 2010. McCrum, N. G.; Buckley, C. P.; Bucknall, C. B. Principles of Polymer Engineering, 2nd ed.; Oxford University Press: New York, NY, 1997. Brittle fracture: fracture that occurs by rapid crack formation and propagation through the material, without any appreciable deformation prior to failure. Crazing: a common response of plastics to an applied load, typically involving the formation of an opaque banded region within transparent plastic; at the microscale, the craze region is a collection of nanoscale, stress-induced voids and load-bearing fibrils within the material’s structure; craze regions commonly occur at or near a propagating crack in the material. Ductile fracture: a mode of material failure that is accompanied by extensive permanent deformation of the material. Ductility: a measure of a material’s ability to undergo appreciable permanent deformation before fracture; ductile materials (including many metals and plastics) typically display a greater amount of strain or total elongation before fracture compared to non-ductile materials (such as most ceramics). Elastic modulus: a measure of a material’s stiffness; quantified as a ratio of stress to strain prior to the yield point and reported in units of Pascals (Pa); for a material deformed in tension, this is referred to as a Young’s modulus. Engineering strain: the change in gauge length of a specimen in the direction of the applied load divided by its original gauge length; strain is typically unit-less and frequently reported as a percentage. -
Fiber Bragg Grating (FBG) Sensors in a High-Scattering Optical Fiber Doped with Mgo Nanoparticles for Polarization-Dependent Temperature Sensing
applied sciences Article Fiber Bragg Grating (FBG) Sensors in a High-Scattering Optical Fiber Doped with MgO Nanoparticles for Polarization-Dependent Temperature Sensing Carlo Molardi 1 , Tiago Paixão 2, Aidana Beisenova 1, Rui Min 3,4 , Paulo Antunes 2 , Carlos Marques 2 , Wilfried Blanc 5 and Daniele Tosi 1,6,* 1 School of Engineering, Nazarbayev University, 53 Kabanbay Batyr, Astana 010000, Kazakhstan 2 Physics Department & I3N, University of Aveiro, 3810-193 Aveiro, Portugal 3 Intelligent Manufacturing Faculty, Wuyi University, Jiangmen, China 4 ITEAM Research Institute, Universitat Politècnica de València, 46022 València, Spain 5 INPHYNI–CNRS UMR 7010, Université Côte d’Azur, Parc Valrose, 06108 Nice, France 6 Laboratory of Biosensors and Bioinstruments, National Laboratory Astana, 53 Kabanbay Batyr, Astana 010000, Kazakhstan * Correspondence: [email protected] Received: 3 July 2019; Accepted: 30 July 2019; Published: 1 August 2019 Featured Application: Inscription and interrogation of fiber Bragg gratings into MgO nanoparticle-doped fiber for optical fiber distributed and multiplexed sensing. Abstract: The characterization of Fiber Bragg Grating (FBG) sensors on a high-scattering fiber, having the core doped with MgO nanoparticles for polarization-dependent temperature sensing is reported. The fiber has a scattering level 37.2 dB higher than a single-mode fiber. FBGs have been inscribed by mean of a near-infrared femtosecond laser and a phase mask, with Bragg wavelength around 1552 nm. The characterization shows a thermal sensitivity of 11.45 pm/◦C. A polarization-selective thermal behavior has been obtained, with sensitivity of 11.53 pm/◦C for the perpendicular polarization (S) and 11.08 pm/◦C for the parallel polarization (P), thus having 4.0% different sensitivity between the two polarizations. -
Alternative Tissue Engineering Scaffolds Based on Starch: Processing Methodologies, Morphology, Degradation and Mechanical Properties
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Universidade do Minho: RepositoriUM Materials Science and Engineering C 20 (2002) 19–26 www.elsevier.com/locate/msec Alternative tissue engineering scaffolds based on starch: processing methodologies, morphology, degradation and mechanical properties M.E. Gomes*, J.S. Godinho, D. Tchalamov, A.M. Cunha, R.L. Reis Department of Polymer Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal Abstract An ideal tissue engineering scaffold must be designed from a polymer with an adequate degradation rate. The processing technique must allow for the preparation of 3-D scaffolds with controlled porosity and adequate pore sizes, as well as tissue matching mechanical properties and an appropriate biological response. This communication revises recent work that has been developed in our laboratories with the aim of producing 3-D polymeric structures (from starch-based blends) with adequate properties to be used as scaffolds for bone tissue engineering applications. Several processing methodologies were originally developed and optimised. Some of these methodologies were based on conventional melt-based processing routes, such as extrusion using blowing agents (BA) and compression moulding (combined with particulate leaching). Other developed technologies included solvent casting and particle leaching and an innovative in situ polymerization method. By means of using the described methodologies, it is possible to tailor the properties of the different scaffolds, namely their degradation, morphology and mechanical properties, for several applications in tissue engineering. Furthermore, the processing methodologies (including the blowing agents used in the melt-based technologies) described above do not affect the biocompatible behaviour of starch-based polymers. -
Functionalized Etched Tilted Fiber Bragg Grating Aptasensor for Label-Free Protein Detection
Biosensors and Bioelectronics 146 (2019) 111765 Contents lists available at ScienceDirect Biosensors and Bioelectronics journal homepage: http://www.elsevier.com/locate/bios Functionalized etched tilted fiber Bragg grating aptasensor for label-free protein detection a,b,* a,1 � c Marzhan Sypabekova , Sanzhar Korganbayev , Alvaro Gonzalez-Vila� , Christophe Caucheteur c, Madina Shaimerdenova a, Takhmina Ayupova a, Aliya Bekmurzayeva a,b, Luca Vangelista d, Daniele Tosi a,b a PI National Laboratory Astana, Laboratory of Biosensors and Bioinstruments, 53 Kabanbay Batyr Avenue, 010000, Nur-Sultan, Kazakhstan b School of Engineering and Digital Sciences, Nazarbayev University, 53 Kabanbay Batyr Avenue, 010000, Nur-Sultan, Kazakhstan c Electromagnetism and Telecommunication Department, University of Mons, Boulevard Dolez 31, 7000, Mons, Belgium d School of Medicine, Nazarbayev University, 53 Kabanbay Batyr Avenue, 010000, Nur-Sultan, Kazakhstan ARTICLE INFO ABSTRACT Keywords: An aptasensor based on etched tilted fiber Bragg grating (eTFBG) is developed on a single-mode optical fiber Optical fiber targeting biomolecule detection. TFBGs were chemically etched using hydrofluoric acid (HF) to partially remove Aptasensor the fiber cladding. The sensor response was coarsely interrogated, resulting on a sensitivity increase from 1.25 Thrombin nm/RIU (refractive index unit) at the beginning of the process, up to 23.38 nm/RIU at the end of the etching, for Etching a RI range from 1.3418 to 1.4419 RIU. The proposed aptasensor showed improved RI sensitivity as compared to Detection the unetched TFBG, without requiring metal depositions on the fiber surface or polarization control during the measurements. The proposed sensor was tested for the detection of thrombin-aptamer interactions based on silane-coupling surface chemistry, with thrombin concentrations ranging from 2.5 to 40 nM.