ENGINEERING RESEARCH PAPERS

fibre optic 2016 IEEE PAPER




Characterization on the distributed fibre optic sensors using a newly developed calibration system
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ABSTRACT: This paper presents the characterization of four tight-buffered strain cables and one loose-buffered temperature cable for the distributed fibre optic sensing using a multi- function calibration platform developed in the laboratory. The calibration platform

Distributed fibre optic long-term monitoring of concrete-lined tunnel section TT10 at CERN
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ABSTRACT. The Centre for European Nuclear Research (CERN) uses large and complex scientific instruments to study the basic constituents of matter by operating a network of underground particle accelerators and appurtenant tunnels. Several tensile cracks have

Fibre optic sensors structural health monitoring of the central beam pipe in the CMS experiment at the CERN laboratories
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Abstract In this paper, we show the new structural monitoring project of the central beam pipe of the Compact Muon Solenoid Experiment (CMS) at CERN. The measurements are carried out by means of a system of Fibre Bragg Grating (FBG) sensor arrays glued on the

Comparative Study of Optic Fibre and Wireless Technologies in Internet Connectivity
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Abstract: Most of the activities going on in the world today demand information and data sharing in one form or the other. Consequently, the Internet and its connectivity has gradually become a household concern. The connection to the Internet requires physical

Study of an acousto-optic laser modulator based on all-fibre Sagnac interferometer
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Abstract: In this article, the feasibility of polarization-maintaining photonic crystal fibre (PM- PCF) strategy for acousto-optic modulation using all-fibre Sagnac interferometer is demonstrated. The principal constraint to apply the strategy is defined by a linear acousto-

fiber optic base papers



GCHQ taps fibre-optic cables for secret access to world's communications
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This includes recordings of phone calls, the content of email messages, entries on Facebook and the history of any internet user's access to websites–all of which is deemed legal, even though the warrant system was supposed to limit interception to a specified range of

Rapid exchange ultra-thin microcatheter using fibre-optic sensing technology for measurement of intracoronary fractional flow reserve
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E-mail: e.regar@erasmusmc.nl Rapid exchange ultra-thin microcatheter using fibre-optic sensing technology for measurement of intracoronary fractional flow reserve The RXi is a fibre-optic sensor technology-based device. This technology might allow reduction in signal drift.

Detection and Localisation of Leakages in Toxic/flammable Chemicals Pipelines Using Distributed Fibre Optic Sensors
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Chemical leaks, such as ammonia, can be the origin of toxic releases. These releases can have severe consequences on the installations as well as on the environment and nearby inhabitants. Industries are prompted to take all possible measures to reduce the

Characterization on the distributed fibre optic sensors using a newly developed calibration system
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ABSTRACT: This paper presents the characterization of four tight-buffered strain cables and one loose-buffered temperature cable for the distributed fibre optic sensing using a multi- function calibration platform developed in the laboratory. The calibration platform

Fibre-optic chemical sensor approaches based on nano assembled thin films: A challenge to future sensor technology
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Optical phenomena have been employed extensively by human civilization throughout the centuries for lighting, communication, calculations, observations, etc. and have played a crucial role in industrial development. The applications of the optics increased significantly

How Laser Diode (LD) intensity modulation induced by current tuning affects the performance of an open-loop Resonator Fibre Optic Gyro (R-FOG) with
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We present how the laser diode (LD) current tuning induced intensity modulation affects the performance of an open-loop resonator fibre optic gyro (R-FOG) with sinusoidal wave modulation. The expression for the demodulation curve under intensity modulation

Static and dynamic pile testing of reinforced concrete piles with structure integratedfibre optic strain sensors
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ABSTRACT Static and dynamic pile tests are carried out to determine the load bearing capacity and the quality of reinforced concrete piles. As part of a round robin test to evaluate dynamic load tests, structure integrated fibre optic strain sensors were used to receive

Fibre Optic Rail Pad Sensor Based Wheel Flat Identification
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Abstract Railways experience a significant set of problems associated with dynamic interaction of the train-track system. These problems mainly stem from existing wheel and track defects. In this paper, a possible way of vibration-based monitoring is investigated.

From Connectivity to Digital Contestations: The Effects of Fibre-OpticInfrastructure on Firms in East Africa
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Abstract: In the previous decade we have seen a concerted set of initiatives that have sought to provide fibre-optic infrastructure to East Africa, yet there has been very little systematic research on the actual effects of improved connectivity on firms in the region. Drawing on

Laboratory and in-situ measurements of structural rotations using fibre-opticgyroscopes
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SUMMARY: This paper will describe the first civil engineering applications of fibre-optic gyroscopes (FOGs) to measure structural rotations. FOGs use the Sagnac effect in a passive optical interferometer design to measure rotations with high precision. Since the rotations

Distributed fibre optic long-term monitoring of concrete-lined tunnel section TT10 at CERN
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ABSTRACT. The Centre for European Nuclear Research (CERN) uses large and complex scientific instruments to study the basic constituents of matter by operating a network of underground particle accelerators and appurtenant tunnels. Several tensile cracks have

Load Monitoring using a Rayleigh Backscattering Fibre Optic System
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Abstract Optical Fiber System can be divided into three categories; discrete point sensing; integrated and distributed sensing. The present study will make use of a distributed sensing system for load monitoring of thermoplastic composite panels. The distributed sensing

A Comparative Study between Dexmedetomidine and Propofol for Fibre-opticIntubation.
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ABSTRACT Background: Providing adequate anxiolysis and sedation with a patent airway while performing fiberoptic bronchoscopic intubation is a challenging task to an anaesthetist. Ideal sedation would ensure calm and cooperative patient maintaining spontaneous

Application of fibre-optic interferometry to detection of human vital signs
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ABSTRACT Ageing population and limited healthcare budgets call for new paradigms and more efficient healthcare and medical services. Home and continuous care for the elderly and people with disabilities can facilitate and prolong their independent living. The core

Fibre Optic Sensing Techniques Based on Incoherent Optical Frequency Domain Reflectometry
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Abstract In this thesis, an alternative approach to the well-known optical time domain reflectometry (OTDR) technique is presented. A thorough analysis regarding distributed backscatter measurement in optical fibres is provided and its prospects for optical fibre

Diagnostic yield of biopsies via fibre-optic bronchoscopy.
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Background: Priority of all bronchoscopies has been diagnostic yield and various techniques have been introduced to improve it. Transbronchial biopsy (TBB) and transbronchial aspirates (TBA) also play an important role in improving diagnostic yield.

A low-cost portable fibre-optic spectrometer for atmospheric absorption studies
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Abstract. A compact and portable solar absorption spectrometer based on fibre-optic Fabry– Perot technology has been built and tested. The instrument weighs only 4.2 kg and operates from 5 W of power from internal batteries. It provides spectroscopy over the range from

Fibre-optic interferometry as a means for the first heart sound detection
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Abstract:-Ambient-assisted living, in particular for the elderly and people with disabilities, call for sensors being capable of detecting several vital sign at a time. We introduce a new healthcare monitoring technology based on fibre-optic interferometry which detects sub-

Fibre Optic Blade Monitoring for optimisation of offshore wind farm OM
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Abstract Since 2005 ECN is developing a system for low cost load monitoring of wind turbines. The system is based on optical fibres and provides a solution to wind farm operators determine the accumulated loads and consumed lifetime of their turbines. The

Distributed Fibre Optic Virtual Fencing System
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Abstract This paper proposes the idea and concept of a virtual fencing system using fibre optics as a distributed intrusion detection sensor system and its potential applications in wildlife and forest protection. In this paper, we have discussed different methods

Structural health monitoring of composite structures by distributed fibre opticsensors
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Fatigue loading: 10 million loading cycles (strain controlled) Dynamic loading: 100 000 cycles at 10 Hz up to 1.0% strain Static loading: 3 preloading cycles and 2 stepped loading cycles up to 0.5% strain, 3 preloading cycles and 1 stepped loading cycles 1.0% strain

Structure-integrated fibre-optic strain wave sensor for pile testing and monitoring of reinforced concrete piles
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ABSTRACT Reinforced concrete piles are used when structures are constructed on soft ground, because it is necessary to transfer the loads into deeper strata with a sufficient bearing capacity. Usually, static and dynamic pile tests are carried out in order to

Strain monitoring using embedded distributed fibre optic sensors in a sprayed concrete tunnel lining during the excavation of cross-passages
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Abstract The Crossrail project is currently the largest construction undertaking in Europe. It includes ten new rail stations, six of which are under central London, and 42 km of new rail tunnels weaving through the UK capital city's congested sub-terrain. The underground

Difficult flexible fibre-optic bronchoscopy: Assist it with video laryngoscopy!
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A 52-year-old male in stridor, known case of carcinoma of the thyroid with recurrence, presented to our Institute's Emergency Department. He was rushed to the operating room, with continuous oxygen supplementation, for tracheostomy with oxygen saturation of 86%

Analysis and Reduction of Stimulated Raman Scattering In DWDM Fibre OpticCommunication System
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ABSTRACT Stimulated Raman scattering effect is one of the Non linear effects in Dense wavelength Division Multiplexed (DWDM) Fibre Optic communication system. The effect of Stimulated Raman Scattering causes power to be transferred from lower wavelength

F." Fibre Optic Towed Array: The High Tech Compact Solution for Naval Warfare
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ABSTRACT High performance lightweight towed arrays can offer significant defence capability benefits when applied to future defence programs. A thin lightweight Fibre Optic Towed Array (FOTA) system was developed by applying the electro-optic (EO)

Recent advances in fibre optic array technologies
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ABSTRACT An acoustic array technology based on distributed feedback fibre laser sensors is described. Details of an advanced fibre laser hydrophone based on a flexural beam bender mechanism are presented, including laboratory data demonstrating sea-state-

Raman Scattering–A Major Roadblock for QKD in Fibre-Optic Networks
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Current research in deployment scenarios of QKD to use a single, common ITU-T G. 652B- compatible fibre for both, data and quantum communications, points to scenarios where system vendors need to control the wavelength plan of all optical signals very accurately [

Creep measurements of steel bolted and pretensioned GFRP composite joint using fibre optic strain sensors
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1FiReCo AS, Storgt. 15, NO-1607Fredrikstad, Norway. 2Norwegian Defence Research Establishment (FFI), PO Box 25, NO-2027 Kjeller, Norway. 3Light Structures as, Haslevn. 38, NO-0571 Oslo, Norway.* alf. e. jensen@ fireco. no Keywords: long-term; monolithic GFRP;

Embedded fibre optic techniques for primary structural components: strain and temperature monitoring
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Abstract The interest of the aerospace industry for Fiber Bragg Grating (FBG) sensors based monitoring systems is continuously increasing. Among the open issues, the need to discriminate the contribution of temperature and strain over FBG measurements has

Dispersion Compensating Fibres for Fibre Optic Telecommunication Systems
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Chromatic dispersion (CD) of optical pulses in an optical fibre influences their width. It refers to changes in propagation of particular frequency components contained in optical pulses causing extension of optical pulses. The fibre reach is then significantly limited, unless

MEASUREMENT OF STRAINS IN CONCRETE BY INTERFEROMETRIC FIBRE OPTIC SENSORS
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Abstract: In recent years, fiber-optic technology appeared in measurement technology and sensors. The great advantage of fiber-optic technology is lifespan and measurement which is not influenced by electromagnetic fields. Therefore, the large cable length can be used.

Tyre Footprint Reconstruction in the Vehicle Axle Weight-in-Motion Measurement by Fibre-optic Sensors.
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Abstract: The problem of measuring road vehicle's weight-in-motion (WIM) is important for overload enforcement, road maintenance planning and cargo fleet managing, control of the legal use of the transport infrastructure, road surface protection from the early destruction

Fibre-Optic Sagnac Interferometer as Seismograph for Direct Monitoring of Rotational Events
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The possibility of a direct monitoring of rotational events has an important role in the seismological sciences as well as in the applied physics regarding large engineering structures. According to the first aspect, a possibility of existence of the rotational phenomena in the seismic

FIBRE-OPTIC SENSORS CALIBRATION METHOD BASED ON GENETIC ALGORITHM IN WEIGHT-IN-MOTION PROBLEM
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Transport and Telecommunication Institute telematics, WIM problem, fibre-optic pressure sensors, calibration,

Scour erosion detection with a Fibre Optic Sensor-Enabled Geo textile
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The detection of the early signs of scour erosion, such as leakage, or settlement, is a key issue for the maintenance of marine, canal and river dikes. Owners are faced to hundreds of kilometres of structure to monitor during strong climatic events, such as high water flows,

Fibre-optic sensing for application in oil and gas wells
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Fibre-optic sensing has the potential to revolutionise well and reservoir surveillance in the oil and gas industry. Benefits come from the passive nature of fibre-optic sensors, the potential for costeffective installations, combined with the possibility of densely-distributed

LOW-LOSS CO ECTIO OF HYBRID FIBRE OPTIC SYSTEMS WITH LOW SE SITIVITY TO WAVELE GTH
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Abstract This paper proposes a method for adjusting light waves propagating in systems composed of photonic fibers, light sources and detection elements. The paper presents the properties of these connections in terms of the loss of signal transmission. Different fiber

Advances in developing standards for fibre-optic sensors
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ABSTRACT Fibre optic sensors provide a great potential in different industrial as well as research fields. They are always then increasingly used if special requirements avoid the application of conventional electrical sensors. The scientific background for optical fibre

Transmission fibre-optic transducer used for a silicon structure's displacement measurement
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Abstract. The study shows a construction and experimental results of a beam-through fibre- optic transducer used for a silicon beam displacement measurement. The transducer consisted of two plastic optical fibres (POF) placed opposite each other–one transmitting

Impact of the external factors on the measurement of weight-in-motion by fibre optic sensor
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The results of application of fibre-optic sensors for measuring the weight of moving vehicles (weight-in-motion–WIM) are discussed in the present study. The different factors affect the measurement accuracy of fibre-optic sensors: features installed in the roadbed, and the

SIGNAL SIMULATION FIBRE OPTIC SENSORS MEASURING WEIGHTIN MOTION IN THE BASIS OF THE DIFFERENTIAL EQUATIONS
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In the present study we are discussing the possibility of fiber optic sensor application for weighing road vehicles in motion (WIM–weight-in-motion). The various factors affecting the accuracy of fiber optic sensors measurement are considered to be: features of the

An introduction to fibre optic Intelligent Distributed Acoustic Sensing (iDAS) technology for power industry applications
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ABSTRACT This paper provides an explanation of the general principles of operation of the Intelligent Distributed Acoustic Sensing technology and focuses on the current areas of interest and applications of this technology within the industry. Currently the technology is

Concrete pile testing and monitoring using structure-integrated fibre-optic strain wave sensors
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Abstract Reinforced concrete piles are used when structures are constructed on soft ground, because it is necessary to transfer the loads into deeper strata with a sufficient bearing capacity. Usually, static and dynamic pile tests are carried out in order to determine the

MODELING AND SIMULATION TO EXTEND FIBRE OPTIC COMMUNICATION SIGNAL TRANSMISSION USING MICRO RING RESONATOR
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. IEEE 802.15. 3c WPAN standard using millimeter optical soliton pulse generated By a Panda ring resonator. IEEE Photonic 5 GHz frequency band soliton

A Robust Fibre Laser System for Electro-optic Electron Bunch Profile Measurements at FLASH
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Abstract For the electro-optic measurement of electron bunch profiles at FLASH a robust ytterbium doped fibre laser (YDFL) system has been developped consisting of a laser oscillator and a two-staged amplifier. The oscillator is designed to meet the specifications