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Journal articles on the topic 'Optique fibrée/fiber optics'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Zalloum, Othman H. Y. "Design of a modern optical fibre spectral transmissometer and a scattering meter." Journal of Optics 29, no. 2 (1998): 53–62. http://dx.doi.org/10.1088/0150-536x/29/2/001.

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2

Wright, P. J. "A superior cathodoluminescence spectral analysis and imaging system for semiconductor characterisation." Proceedings, annual meeting, Electron Microscopy Society of America 49 (August 1991): 838–39. http://dx.doi.org/10.1017/s0424820100088506.

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Cathodoluminescence is a useful technique in the structural and electro optical characterisation of semiconductors. When performed in a electron microscope, both high spatial resolution images and spectra may be obtained by use of the correct equipment.Many designs for instruments suitable for cathodoluminescence spectral analysis and imaging in electron microscopes have been described in the literature during the past 25 years. These have often exhibited improved performance when compared with commercially available systems. The prime reason for this has been the willingness of the dedicated

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3

Calatroni, J., C. Froehly, and H. Al Mawie. "Transmission d’image en couleurs dans une seule fibre optique." Applied Optics 26, no. 11 (1987): 2206. http://dx.doi.org/10.1364/ao.26.002206.

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4

Mosey, Sarah, Feras Korkees, Andrew Rees, and Gethin Llewelyn. "Investigation into fibre orientation and weldline reduction of injection moulded short glass-fibre/polyamide 6-6 automotive components." Journal of Thermoplastic Composite Materials 33, no. 12 (2019): 1603–28. http://dx.doi.org/10.1177/0892705719833098.

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Due to the increasing demands on automotive components, manufacturers are relying on injection moulding components from fibre-reinforced polymers in an attempt to increase strength to weight ratio. The use of reinforcing fibres in injection moulded components has led to component failures whereby the material strength is hampered through the formation of weldlines which are also a problem for unreinforced plastics. In this study, an industrial demonstrator component has the injection locations verified through a combination of fibre orientation tensor simulation and optical microscopy analysis

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5

RØYSET, ARNE, and DAG ROAR HJELME. "COMBATTING NONLINEAR DISTORTION IN OPTICAL FIBRE TRANSMISSION SYSTEMS BY OPTIMUM DISPERSION COMPENSATION AND MODULATION FORMAT." Journal of Nonlinear Optical Physics & Materials 09, no. 02 (2000): 227–34. http://dx.doi.org/10.1142/s0218863500000200.

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The use of optical amplifiers in optical fibre communication systems has led to a situation where optical nonlinearities has become a major system limitation in long repeaterless high bitrate transmission systems. In this paper we present results from numerical studies of the interaction between dispersion and self phase modulation in 10–40 Gbit/s systems and presents design guidelines for such systems. We have found that optimised dispersion compensation can reduce the distortion caused by optical nonlinearities, hence allowing higher power levels in the fibre and thereby increasing the power

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6

Bünting, Uwe, and Peter Karlitschek. "Mathematical model for optimum fibre optic probe design and characterisation." Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 54, no. 10 (1998): 1369–74. http://dx.doi.org/10.1016/s1386-1425(98)00043-2.

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7

Idris, J., G. D. Eyu, A. M. Mansor, Z. Ahmad, and C. S. Chukwuekezie. "A Preliminary Study of Biodegradable Waste as Sorbent Material for Oil-Spill Cleanup." Scientific World Journal 2014 (2014): 1–5. http://dx.doi.org/10.1155/2014/638687.

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Oil spill constitutes a major source of fresh and seawater pollution as a result of accidental discharge from tankers, marine engines, and underwater pipes. Therefore, the need for cost-effective and environmental friendly sorbent materials for oil spill cleanup cannot be overemphasized. The present work focuses on the preliminary study of empty palm fruit bunch fibre as a promising sorbent material. The morphology of the unmodified empty palm fruit bunch, EPFB fibre, was examined using an optical microcopy, scanning electron microcopy coupled with EDX and X-ray diffraction. The effects of oil

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8

Namihira, Y., Y. Horiuchi, M. Kuwazuru, M. Nunokawa та Y. Iwamoto. "Optimum fibre parameters of low-loss single-mode optical fibres for use in 1.55μm-wavelength region". Electronics Letters 23, № 18 (1987): 963. http://dx.doi.org/10.1049/el:19870677.

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9

Peng, G. D., J. D. Love, and A. Ankiewicz. "Optimum design of adiabatic weakly guiding nonlinear optical fibre tapers." Optical and Quantum Electronics 23, no. 9 (1991): 1179–88. http://dx.doi.org/10.1007/bf00619986.

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10

Xu, Cheng, and Zahra Sharif Khodaei. "A Novel Fabry-Pérot Optical Sensor for Guided Wave Signal Acquisition." Sensors 20, no. 6 (2020): 1728. http://dx.doi.org/10.3390/s20061728.

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In this paper, a novel hybrid damage detection system is proposed, which utilizes piezoelectric actuators for guided wave excitation and a new fibre optic (FO) sensor based on Fabry-Perot (FP) and Fiber Bragg Grating (FBG). By replacing the FBG sensors with FBG-based FP sensors in the hybrid damage detection system, a higher strain resolution is achieved, which results in higher damage sensitivity and higher reliability in diagnosis. To develop the novel sensor, optimum parameters such as reflectivity, a wavelength spectrum, and a sensor length were chosen carefully through an analytical model

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11

Oliaei, Erfan, Pär A. Lindén, Qiong Wu, Fredrik Berthold, Lars Berglund, and Tom Lindström. "Microfibrillated lignocellulose (MFLC) and nanopaper films from unbleached kraft softwood pulp." Cellulose 27, no. 4 (2019): 2325–41. http://dx.doi.org/10.1007/s10570-019-02934-8.

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Abstract Microfibrillated cellulose (MFC) is an important industrial nanocellulose product and material component. New MFC grades can widen the materials property range and improve product tailoring. Microfibrillated lignocellulose (MFLC) is investigated, with the hypothesis that there is an optimum in lignin content of unbleached wood pulp fibre with respect to nanofibril yield. A series of kraft fibres with falling Kappa numbers (lower lignin content) was prepared. Fibres were beaten and fibrillated into MFLC by high-pressure microfluidization. Nano-sized fractions of fibrils were separated

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12

Mure-Ravaud, A., and R. Rougny. "Effet de l'irradiation par des neutrons sur les caractéristiques temporelles d'une fibre optique à gradient d'indice." Optical and Quantum Electronics 18, no. 1 (1986): 43–48. http://dx.doi.org/10.1007/bf02069359.

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13

Gharbia, Yousef A., and Jayantha Katupitiya. "Experimental determination of optimum parameters for nano-grinding of optical fibre end faces." International Journal of Machine Tools and Manufacture 44, no. 7-8 (2004): 725–31. http://dx.doi.org/10.1016/j.ijmachtools.2004.02.003.

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14

Liu, Chong, Ricardo Correia, Hattan Ballaji, Serhiy Korposh, Barrie Hayes-Gill, and Stephen Morgan. "Optical Fibre Sensor for Simultaneous Measurement of Capillary Refill Time and Contact Pressure." Sensors 20, no. 5 (2020): 1388. http://dx.doi.org/10.3390/s20051388.

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The widely applied capillary refill time (CRT) measurement is currently performed by manually applying pressure and using a stopwatch to record the time taken for the skin to recover its normal colour after a blanching pressure is applied. This method is highly subjective and observer-dependent. This paper presents a new, integrated optical sensor probe, combining monitoring of the capillary refilling process with the blanching pressure applied. The sensor consists of an optical fibre-based reflectance photoplethysmography (PPG) sensor to measure the reflected light signal, as well as a fibre

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15

Ohkawa, N., and T. Takahashi. "Optimum bandwidth limitation method to overcome GVD-based effect in practical fibre-optic transmission systems." IEE Proceedings - Communications 150, no. 1 (2003): 64. http://dx.doi.org/10.1049/ip-com:20030285.

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16

Devaux, F. "Optimum prechirping conditions of externally modulated lasers for transmission on standard fibre." IEE Proceedings - Optoelectronics 141, no. 6 (1994): 363–66. http://dx.doi.org/10.1049/ip-opt:19941584.

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17

Vinoj, M. N., and V. C. Kuriakose. "Generation of pedestal-free ultrashort soliton pulses and optimum dispersion profile in real dispersion-decreasing fibre." Journal of Optics A: Pure and Applied Optics 6, no. 1 (2003): 63–70. http://dx.doi.org/10.1088/1464-4258/6/1/012.

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18

Hančič, Aleš, Karl Kuzman, Franc Kosel, Andrej Glojek, António M. Cunha, and Gašper Gantar. "Mechanical and Processing Characterisation of Effective Behaviour of Wood-Plastic Composites by Analytical and Numerical Simulation." Materials Science Forum 575-578 (April 2008): 959–71. http://dx.doi.org/10.4028/www.scientific.net/msf.575-578.959.

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The development of a new composite that is compounded of natural fibres and of a low price polymer, such as HDPE or PP, began in the last decade of the past century. While this is a rather new material no attempts have been made to analytically describe and simulate mechanical properties of this material. There is also a great lack of knowledge in describing fine tuned processing parameters. Therefore, in the first part of this article micromechanical approach based upon Generalised Method of Cells (GMC) is introduced to simulate properties of injection moulded wood-plastic composite compounde

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19

Karasek, M. "Optimum design of Er3+ doped fluoride fibre amplifiers pumped at 820 nm and 1480 nm." IEE Proceedings - Optoelectronics 141, no. 3 (1994): 167–72. http://dx.doi.org/10.1049/ip-opt:19949954.

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20

Nengsih, Sri, Akrajas Ali Umar, Muhamad Mat Salleh, and Muhammad Yahaya. "Detection of Formaldehyde Using Plasmonic Properties of Gold Nanoparticles ." Key Engineering Materials 495 (November 2011): 79–82. http://dx.doi.org/10.4028/www.scientific.net/kem.495.79.

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This paper reports a study on plasmonic properties of gold nanoparticles to detect the presence of formaldehyde solution in water. Gold nanoparticles were grown on substrates by the seed mediated growth method. A sensor system was setup, comprises a light source, a dual arm fibre optic probe, a spectrometer and sensor chamber. The detection of formaldehyde was done by comparing the Localized Surface Plasmon Resonance (LSPR) spectra of gold nanoparticles samples immersed in the deionised water and formaldehyde solution. It was observed that the peak position LSPR spectra of nanogold samples and

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21

Kamuri, Mohd, Zurina Zainal Abidin, Mohd Yaacob, Mohd Hamidon, Nurul Md Yunus, and Suryani Kamarudin. "Separation and Detection of Escherichia coli and Saccharomyces cerevisiae Using a Microfluidic Device Integrated with an Optical Fibre." Biosensors 9, no. 1 (2019): 40. http://dx.doi.org/10.3390/bios9010040.

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This paper describes the development of an integrated system using a dry film resistant (DFR) microfluidic channel consisting of pulsed field dielectrophoretic field-flow-fractionation (DEP-FFF) separation and optical detection. The prototype chip employs the pulse DEP-FFF concept to separate the cells (Escherichia coli and Saccharomyces cerevisiae) from a continuous flow, and the rate of release of the cells was measured. The separation experiments were conducted by changing the pulsing time over a pulsing time range of 2–24 s and a flow rate range of 1.2–9.6 μ L min − 1 . The frequency and v

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22

Jaroszewicz, Zbigniew, Eugeniusz Czech, and Tomasz Osuch. "Diffractive gratings with varying period’s shape." Photonics Letters of Poland 11, no. 2 (2019): 41. http://dx.doi.org/10.4302/plp.v11i2.904.

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The aim of this short review is to recall various designs of diffraction gratings when the condition of the period’s identity is relaxed and to mention resulting thus some of their applications. Among others the apodization function can be implemented as a variable diffraction efficiency due to the gradual change of the period’s shape. Another possible application is the passive achromatization of the diffraction efficiency of the blazed gratings by randomizing their blaze angle. Full Text: PDF ReferencesP. Jacquinot and B. Roizen-Dossier, "II Apodisation", Prog. Opt. 3, 29 (1964). CrossRef H.

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23

Santulli, C., R. Brooks, C. D. Rudd, and A. C. Long. "Influence of microstructural voids on the mechanical and impact properties in commingled E-glass/polypropylene thermoplastic composites." Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications 216, no. 2 (2002): 85–100. http://dx.doi.org/10.1177/146442070221600204.

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In recent years, the compression moulding of E-glass/polypropylene commingled composites has been thoroughly investigated. In particular, in the University of Nottingham, a number of studies have been carried out, trying to correlate moulding parameters with mechanical properties and microstructural void content. However, some aspects of commingled composites have received less coverage so far and are therefore dealt with in this paper. These concern the effect of the processing conditions of these materials on interlaminar shear strength and impact properties and the influence of the synergy

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24

Peiris, B. R. H., H. Budman, C. Moresoli, and R. L. Legge. "Acquiring reproducible fluorescence spectra of dissolved organic matter at very low concentrations." Water Science and Technology 60, no. 6 (2009): 1385–92. http://dx.doi.org/10.2166/wst.2009.367.

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A method that would allow for fast and reliable measurements of dissolved organic matter (DOM), both at low and high concentration levels would be a valuable tool for online monitoring of DOM. This could have applications in a variety of areas including membrane treatment systems for drinking water applications which is of interest to our group. In this study, the feasibility of using fluorescence spectroscopy for monitoring DOM at very low concentration levels was demonstrated with an emphasis on optimizing the instrument parameters necessary to obtain reproducible fluorescence signals. Signa

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25

Wittmann, Johannes, Matthew T. Huggett, Stephen G. Bown, and Stephen P. Pereira. "Safety Study of Photodynamic Therapy Using Talaporfin Sodium in the Pancreas and Surrounding Tissues in the Syrian Golden Hamster." International Journal of Photoenergy 2014 (2014): 1–7. http://dx.doi.org/10.1155/2014/483750.

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Aim. To assess the safety of photodynamic therapy (PDT) using talaporfin sodium on the pancreas and surrounding organs in normal hamsters.Methods. Fluorescence microscopy documented talaporfin levels in liver, duodenum, and pancreas up to 24 hours after photosensitisation. Lesion size in liver 3 days after PDT (50 J, 5 mg/kg, variable drug-light interval (DLI)) was documented to optimise the DLI. Using optimum DLI, pancreas and surrounding organs were treated with laser fibre touching the surface and animals were killed at 3 or 21 days.Results. Peak fluorescence was seen in duodenum and pancre

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26

Schroeter, B., L. Kappen, and C. Moldaenke. "Continuous in Situ Recording of the Photosynthetic Activity of Antarctic Lichens—established Methods and a New Approach." Lichenologist 23, no. 3 (1991): 253–65. http://dx.doi.org/10.1017/s0024282991000415.

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AbstractA new method is described that records the periods of photosynthetic and respiratory activity in lichen thalli in situ by measuring the actinic chlorophyll fluorescence response of the photobiont. The technique is based on a pulse amplitude modulation fluorometer that was specially developed for continuous and unattended measurements in the Antarctic. In Livingston Island, South Shetland Islands, the periods of metabolic activity of Usnea antarctica were recorded simultaneously with the microclimatic parameter in its natural environment. In one series of diurnal measurements the fluore

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27

Aldaya, Ivan, Elias Giacoumidis, Geraldo de Oliveira, et al. "Histogram Based Clustering for Nonlinear Compensation in Long Reach Coherent Passive Optical Networks." Applied Sciences 10, no. 1 (2019): 152. http://dx.doi.org/10.3390/app10010152.

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In order to meet the increasing capacity requirements, network operators are extending their optical infrastructure closer to the end-user while making more efficient use of the resources. In this context, long reach passive optical networks (LR-PONs) are attracting increasing attention.Coherent LR-PONs based on high speed digital signal processors represent a high potential alternative because, alongside with the inherent mixing gain and the possibility of amplitude and phase diversity formats, they pave the way to compensate linear impairments in a more efficient way than in traditional dire

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28

Vandamme, Patrick, Jean-Baptiste Thomine, and Philippe Gallion. "La transmission par solitons sur fibre optique soliton transmission on optical fibres." Annales Des Télécommunications 50, no. 1 (1995). http://dx.doi.org/10.1007/bf03000771.

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29

"The synaptic distribution of the retinal input in the superficial layers of the guinea-pig superior colliculus." Proceedings of the Royal Society of London. Series B. Biological Sciences 225, no. 1238 (1985): 129–46. http://dx.doi.org/10.1098/rspb.1985.0055.

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An evoked potential consisting of four postsynaptic components was recorded in the guinea-pig superior colliculus following electrical stimulation of the contralateral optic nerve. This potential was generated in response to the activation of four populations of optic nerve fibres with different conduction velocities. Current source-density analysis revealed that the two slower conducting fibre populations synapse in the upper third of the stratum griseum superficiale on dendrites whose cell bodies appear to be found in the lower part of this layer and in the stratum opticum. The two faster co

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30

Pearson, A., J. R. Lincoln, W. S. Brocklesby, and J. N. Carte. "Site-Selective Specirdsmpy of Thulium-Doped Glasses." MRS Proceedings 244 (1991). http://dx.doi.org/10.1557/proc-244-197.

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ABSTRACTLaser operation has been demonstrated in Tm3+-doped optical fibres at several useful wavelengths, including 2.3μm, 2μm, 1.47μm and 800nm, and visible upconversion fluorescence observed in silica and ZBIAN hosts. The ground-state Stark structure is ∼600cm−1 wide, resulting in broad tuning ranges for the lasers studied so far. As several of these laser are operated quasifour level using the ground state multiplet, the structure of this multiplet influences the laser transitions significantly. We Ipresent site-selective line-narrowed fluorescence studies of thulium in ZBLAN1 and silica-ba

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31

Gupta, Amit, and Nagpal Shaina. "Modelling of 10 Gbps Free Space Optics Communication Link Using Array of Receivers in Moderate and Harsh Weather Conditions." Journal of Optical Communications 38, no. 3 (2017). http://dx.doi.org/10.1515/joc-2016-0064.

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AbstractIntersymbol interference and attenuation of signal are two major parameters affecting the quality of transmission in Free Space Optical (FSO) Communication link. In this paper, the impact of these parameters on FSO communication link is analysed for delivering high-quality data transmission. The performance of the link is investigated under the influence of amplifier in the link. The performance parameters of the link like minimum bit error rate, received signal power and Quality factor are examined by employing erbium-doped fibre amplifier in the link. The effects of amplifier are vis

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32

Ramesh Gabriel, Jesuwanth Sugesh, and Sivasubramanian Arunagiri. "Performance analysis of carrier depletion silicon PIN phase shifter." Journal of Optical Communications, October 23, 2020. http://dx.doi.org/10.1515/joc-2019-0259.

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AbstractIn this paper, we report the performance of a carrier depletion Silicon PIN phase shifter with over layer of 130 nm. It is observed that an optimum intrinsic gap of 250 nm for a device length of 5 mm at 2 V, resulted in Extinction Ratio (ER) of 23.41 dB and Bit Error Rate (BER) of 1.00 × 10−7 is obtained for 50 Gbps. The phase shifter is also designed for length 2 mm with an intrinsic gap of 100 nm at an operating voltage <4 V. The study also reveals that the proposed design for Mach-Zehnder modulator operating at a data rate of 100 Gbps for the concentration of P = 7 × 1017 cm−3 an

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33

"Nanomaterials and nanotechnology for composites: synthesis, structure, properties and new application opportunities." Biointerface Research in Applied Chemistry 10, no. 3 (2020): 5634–35. http://dx.doi.org/10.33263/briac103.634635.

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The aim of this special issue is to bring cutting-edge research across the entire spectrum of Materials Science and Nanotechnology. This special issue involves combining and understanding of the physical principles demonstrated by composite materials, nanomaterials, biomaterials, technology of nanometre-scale objects and other materials technologies. Materials engineering gathers scientists and engineers from many different subjects, such as materials science, nanotechnology, microtechnology, ceramic, metal, polymer, composite technology, and structural materials. This special issue allows res

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