Relevant bibliographies by topics / Fibre Optic Sensing

Academic literature on the topic 'Fibre Optic Sensing'

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Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Fibre Optic Sensing"

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Orrell, Peter R. "DISTRIBUTED FIBRE OPTIC TEMPERATURE SENSING." Sensor Review 12, no. 2 (February 1992): 27–31. http://dx.doi.org/10.1108/eb007876.

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Spotts, Isaac, Dima Ismail, Noor Jaffar, and Christopher M. Collier. "Fibre-optic sensing in digital microfluidic devices." Sensors and Actuators A: Physical 280 (September 2018): 164–69. http://dx.doi.org/10.1016/j.sna.2018.07.039.

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Kirkendall, Clay K., and Anthony Dandridge. "Overview of high performance fibre-optic sensing." Journal of Physics D: Applied Physics 37, no. 18 (September 3, 2004): R197—R216. http://dx.doi.org/10.1088/0022-3727/37/18/r01.

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Walsh, J. E., K. Y. Kavanagh, S. Fennell, J. Murphy, and M. Harmey. "Fibre-optic micro-spectrometers for biomedical sensing." Transactions of the Institute of Measurement and Control 22, no. 5 (December 2000): 355–69. http://dx.doi.org/10.1177/014233120002200502.

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Amanzadeh, Moe, Saiied M. Aminossadati, Mehmet S. Kizil, and Aleksandar D. Rakić. "Recent developments in fibre optic shape sensing." Measurement 128 (November 2018): 119–37. http://dx.doi.org/10.1016/j.measurement.2018.06.034.

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Walsh, J. E., K. Y. Kavanagh, S. Fennell, J. Murphy, and M. Harmey. "Fibre-optic micro-spectrometers for biomedical sensing." Transactions of the Institute of Measurement and Control 22, no. 5 (May 1, 2000): 355–69. http://dx.doi.org/10.1191/014233100701523864.

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Thomas, Sean Dormer. "High sensitivity fibre optic vibration sensing device." Journal of the Acoustical Society of America 124, no. 1 (2008): 25. http://dx.doi.org/10.1121/1.2960791.

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Davenport, John J., Michelle Hickey, Justin P. Phillips, and Panayiotis A. Kyriacou. "Dual pO2/pCO2fibre optic sensing film." Analyst 142, no. 10 (2017): 1711–19. http://dx.doi.org/10.1039/c7an00173h.

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Murphy, V., B. D. MacCraith, T. Butler, C. McDonagh, and B. Lawless. "Quasi-distributed fibre-optic chemical sensing using telecom optical fibre." Electronics Letters 33, no. 7 (1997): 618. http://dx.doi.org/10.1049/el:19970392.

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Grattan, K. T. V. "The Use of Fibre Optic Techniques for Temperature Measurement." Measurement and Control 20, no. 6 (July 1987): 32–39. http://dx.doi.org/10.1177/002029408702000608.

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The subject area of fibre optic sensing is one in which there has been shown a very rapid expansion of interest over the last few years. Many novel techniques are appearing in the literature and some products are available to the industrial user. The background to fibre optic means of temperature sensing and some recent developments will be reviewed in this paper.
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Dissertations / Theses on the topic "Fibre Optic Sensing"

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Attridge, John Worthington. "Fibre optic chemical sensing." Thesis, Imperial College London, 1986. http://hdl.handle.net/10044/1/37931.

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Khaliq, Sarfraz. "Fibre-optic long period gratings for sensing applications." Thesis, Cranfield University, 2003. http://dspace.lib.cranfield.ac.uk/handle/1826/7886.

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Long period gratings (LPGs) are formed by inducing a permanent periodic modulation of the refractive index (RI) of the core of an optical fibre. The transmission spectrum of the LPG contains a series of attenuation bands centered at discrete wavelengths. The exact form of the transmission spectrum and the central wavelengths of the attenuation bands, are sensitive to the period and the length of the LPG and to the local environment. The sensitivity of a LPG to a particular measurand is dependant upon the composition of the fibre and upon the order of the cladding mode to which the guided mode is coupled to and is thus different for each attenuation band. Cont/d.
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Bownass, David Casson. "Passive fibre-optic humidity sensing for telecommunications networks." Thesis, Heriot-Watt University, 1998. http://hdl.handle.net/10399/1191.

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Flannery, D. "Fibre optic chemical sensing using Langmuir-Blodgett overlay waveguides." Thesis, Cranfield University, 1998. http://dspace.lib.cranfield.ac.uk/handle/1826/10719.

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Fibre optic chemical sensing has been demonstrated using side-polished single mode optical bre, evanescently coupled to chemically sensitive Langmuir-Blodgett overlay waveguides. The sensors exhibit a channel dropping response centred on a wavelength dependent upon the thickness and refractive index of the overlay waveguide. It has been shown that chemically sensitive organic dyes prove to be suitable materials for forming the overlay waveguide whereas the Langmuir-Blodgett deposition technique provides the required overlay thickness control. A brief optic pH sensor has been demonstrated by depositing a merocyanine dye onto a side-polished optical fibre which exhibits a change in transmission of 9.7 ± 0.8 dB pH" at a working wavelength of 750 n and 4.2 ± 0.5 dB pH`1 at 780 nm, with a shift in the channel dropping centre wavelength of 18.8 ± 0.8 n pH`1. The response time of the sensor to a step change in pH has been measured to be ~ 20 s. The advantage of being able to chemically engineer the organic materials used to form the overlay waveguides has been demonstrated by manufacturing a second pH sensor designed to operate at longer wavelengths using a second, modified merocyanine dye. The overall wavelength response of this second sensor to pH has been shown to be non- linear but a sensitivity of 23.3 ± 0.3 n pH`l is observed over a linear region. Finally, i order to investigate the non-linear response, a computer model based on the Kramers- Kronig relations has been devised and shows good agreement with experimental values. l
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Flannery, Damian. "Fibre optic chemical sensing using Langmuir-Blodgett overlay waveguides." Thesis, Cranfield University, 1998. http://dspace.lib.cranfield.ac.uk/handle/1826/10719.

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Fibre optic chemical sensing has been demonstrated using side-polished single mode optical bre, evanescently coupled to chemically sensitive Langmuir-Blodgett overlay waveguides. The sensors exhibit a channel dropping response centred on a wavelength dependent upon the thickness and refractive index of the overlay waveguide. It has been shown that chemically sensitive organic dyes prove to be suitable materials for forming the overlay waveguide whereas the Langmuir-Blodgett deposition technique provides the required overlay thickness control. A brief optic pH sensor has been demonstrated by depositing a merocyanine dye onto a side-polished optical fibre which exhibits a change in transmission of 9.7 ± 0.8 dB pH" at a working wavelength of 750 n and 4.2 ± 0.5 dB pH`1 at 780 nm, with a shift in the channel dropping centre wavelength of 18.8 ± 0.8 n pH`1. The response time of the sensor to a step change in pH has been measured to be ~ 20 s. The advantage of being able to chemically engineer the organic materials used to form the overlay waveguides has been demonstrated by manufacturing a second pH sensor designed to operate at longer wavelengths using a second, modified merocyanine dye. The overall wavelength response of this second sensor to pH has been shown to be non- linear but a sensitivity of 23.3 ± 0.3 n pH`l is observed over a linear region. Finally, i order to investigate the non-linear response, a computer model based on the Kramers- Kronig relations has been devised and shows good agreement with experimental values.
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de, Souza Keith R. C. P. "Fibre-optic distributed sensing based on spontaneous Brillouin scattering." Thesis, University of Southampton, 1999. https://eprints.soton.ac.uk/351507/.

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This thesis reports on the use of spontaneous Brillouin scattering for the purpose of fibre-optic distributed temperature and strain sensing based on a time-domain Landau-Placzek ratio technique. Detection system specifications are dictated by the spatial resolution, range, measurand resolution and measurement time. Pulsed sources are used in these sensors. The minimum spatial resolution depends on both the pulse width and receiver bandwidth. The range and measurand resolution depend on the peak pulse power launched into the sensing fibre as well as the Brillouin signal-to-noise characteristics at the receiver. The maximum launched pulse power is limited by the onset of nonlinear effects in the sensing fibre. Novel interferometric techniques based on low-cost, low loss all fibre Mach-Zehnder interferometric optical filters needed to separate the backscattered Rayleigh and spontaneous Brillouin signals have been developed with enhanced signal-to-noise capabilities. Used in conjunction with a newly developed low noise optical preamplifier /transimpedance receiver system, a distributed temperature sensor having 1.8m spatial resolution, 6.3 °C temperature resolution and a range of 23km is demonstrated. The strain dependence of the spontaneous Brillouin intensity has been determined. This coefficient is crucial for the development of a distributed temperature only sensor and /or a combined distributed temperature and strain sensor. Pulsed narrowband and broadband sources are necessary for resolving the Rayleigh and Brillouin signals as well as reducing coherent Rayleigh noise. The latter has been investigated and its dependence on certain parameters confirmed. A source capable of switching between narrowband and broadband operation has been demonstrated and is particularly appropriate for extended periods of data collection cycles.
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McMurtry, Stefan. "Multipoint humidity sensing based upon a multiplexed fibre optic sensor." Thesis, University of Kent, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.310209.

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Wait, Peter Collinson. "The application of Brillouin scattering to distributed fibre optic sensing." Thesis, University of Southampton, 1997. https://eprints.soton.ac.uk/394568/.

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This thesis reports on an investigation into the application of Brillouin scattering for the purpose of distributed fibre optic sensing. The main focus of the work has been centred on a Brillouin optical time domain reflectometer (BOTDR) system. The behaviour of short (3m), medium (60m) and long (6km) erbium doped fibre amplifiers using narrow bandwidth pulsed signals has been investigated and the most suitable configuration for the source requirement of the BOTDR identified. The operation of a (BOTDR) system has been demonstrated at the low loss window of 1.5µm wavelength. Multiple Stokes orders of stimulated Brillouin scattering in a medium length erbium doped fibre amplifier using pulsed excitation are reported. The observed stimulated Brillouin threshold power is significantly reduced as a result of optical gain. The points of origin within the fibre of the generated Stokes pulses are located using space-time diagrams and are observed to depend on the Brillouin and Erbium pump powers. This has therefore been identified as a possible mechanism for sensing applications utilizing the novel technique of varying the pump powers to spatially interrogate the fibre. Measurements of the Brillouin scattering coherence length in silica fibre using a fibre Mach Zehnder interferometer are presented. As the Brillouin pump power is increased from below to above stimulated threshold, the line shape narrows and changes from that of a Lorentzian to a Gaussian. It is also shown that the Brillouin bandwidth approaches a limiting value. It is shown experimentally that the ratio of the intensities of Rayleigh and Brillouin backscattered light (Landau Placzek ratio) in an optical fibre has a temperature dependence which may be used for the basis of a distributed temperature sensor. This result, combined with the known frequency dependence of the Brillouin backscattering on temperature and strain, indicates spontaneous Brillouin backscatter may be used for the unique determination of either temperature or strain in a distributed fibre optic sensing system. Because of the coherent nature of Rayleigh scattering, use of the same narrow bandwidth source as required for the Brillouin signal in the Landau Placzek ratio method, results in significant coherent noise in the Rayleigh signal. A novel technique is demonstrated whereby the amplified spontaneous emission noise and amplifying properties of an erbium doped fibre amplifier may be exploited to reduce the coherent noise on the Rayleigh backscatter signal. This results in a significant improvement in both temperature and spatial resolution.
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Wong, Rebecca. "Advanced fibre optic long period grating sensors : design, fabrication and sensing." Thesis, Cranfield University, 2014. http://dspace.lib.cranfield.ac.uk/handle/1826/9153.

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This thesis describes the process and technique used to fabricate reproducible optical fibre long period gratings (LPG) of various types. It explores how they can be exploited for use as highly selective and sensitive sensors. A versatile method for fabricating LPG sensors has been demonstrated. The single system has the capability of fabricating LPGs of different configurations, such as uniform period, those operating at the phase matching turning point (PMTP), as well as phase shifted and chirped. LPGs were characterised for their sensitivities to temperature, axial strain and surrounding refractive index. The gratings at the PMTP were found to show higher sensitivities to external influences. Novel sensing configurations that exploit the properties of LPGs were also constructed. An LPG coated with a molecularly imprinted ceramic coating was demonstrated to offer a selective method for porphyrin detection. A composite nanoscale of a titanium oxide (TiO2) matrix and 5, 10, 15, 20 Tetrakis-(N-methyl-piridinium4- yl)-21H, 23H-porphine tertakis (p-toluenesulfonate) [TMPyP] porphyrin template film was deposited on the LPG via liquid phase deposition. Attempts to rebind porphyrins to the matrix were carried out. The LPGs transmission spectrum exhibited a higher sensitivity to the target TMPyP template than it did to other, structurally similar porphyrins, showing high selectivity. A continuously chirped long period grating (CCLPG) sensor for monitoring directional flow and cure of an epoxy resin is also presented. The asymmetric properties of the CCLPG were exploited to facilitate the measurement of the direction of the flow. The CCLPG was also used to monitor changes in the refractive index of the resin during its cure, showing close agreement with a fibre optic Fresnel refractometer.
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Guillemain, Henri. "Fibre optic sensing techniques for the detection of lead (II) ions." Thesis, City University London, 2009. http://openaccess.city.ac.uk/12440/.

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Lead is an element with harmful effects to man and whose uses are being increasingly subject to legislations. This thesis describes the incorporation of two lead-sensitive reagents in different fibre optic sensing configurations. The reagents were carefully selected for their response towards lead. A probe was built for each reagent and a sensor system designed, constructed and tested with each probe followed by analysis of the experimental data obtained from them. The first reagent is a chromogenic dye whose absorption spectrum changes in the presence of lead ions. In this work, a reflectance-based probe is built and tested to exploit this feature. A robust referencing technique based on the performance of the probe is developed that allows the sensor to operate amid unstable conditions. The second reagent is a fluorophore whose fluorescence mechanism and affinity to lead ions are explained in detail. Based on its binding properties with lead, the sol-gel matrix is selected to encapsulate this reagent and a probe is thus constructed but in subsequent tests, no response to lead ion is detected. A hypothesis is put forward to explain the lack of reaction between lead and the fluorophore in its entrapped environment. As a result, the fluorophore is then utilised in solution where its characteristics have already been established and a capillary probe which exploits the capillary effect for its operation is constructed and evaluated. Existing analytical techniques are reviewed in this work and compared to fibre optic sensors whose various sensing configurations are then described. The instrumentation and measurement techniques used throughout this work are also discussed.
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Books on the topic "Fibre Optic Sensing"

1

Hussain, Shanila. Fibre optic sensing of ammonia and humidity. Manchester: UMIST, 1997.

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Kang, Jin U. Fiber optic sensing and imaging. New York, NY: Springer, 2013.

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Kang, Jin U., ed. Fiber Optic Sensing and Imaging. New York, NY: Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-7482-1.

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Valis, Tomas. Distributed fiber optic sensing based on counterpropagating waves. [S.l.]: [s.n.], 1989.

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Ammoo, Mohd Shariff. A computer controlled fiber optic sensing system forcomponentinspection systems. Manchester: UMIST, 1992.

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Adamovsky, Grigory. Intensity to frequency conversion technique in intensity modulated fiber optic sensing systems. [Washington, D.C.]: NASA, 1990.

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Adamovsky, Grigory. Amplitude spectrum modulation technique for analog data processing in fiber optic sensing system with temporal separation of channels. [Washington, DC]: National Aeronautics and Space Administration, 1989.

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Lorenz, Peter G. The science of remote visual inspection (RVI): Technology, applications, equipment. Lake Success, NY: Olympus Corp., 1990.

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Turner, Roderick David. Dual wavelength fiber-optic polarimeter for path-integrated strain sensing: application to the measurement of local slope on a flexible beam. [Downsview, Ontario]: University of Toronto, Institute for Aerospace Studies, 1991.

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Turner, Roderick David. Dual wavelength fiber-optic polarimeter for path-integrated strain sensing: application to the measurement of local slope on a flexible beam. [Downsview, Ont.]: University of Toronto, Institute for Aerospace Studies, 1990.

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Book chapters on the topic "Fibre Optic Sensing"

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Kharaz, A., and B. E. Jones. "A Distributed Fibre Optic Sensing System for Humidity Measurement." In Applications of Photonic Technology, 335–38. Boston, MA: Springer US, 1995. http://dx.doi.org/10.1007/978-1-4757-9247-8_63.

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Jackson, D. A. "Monomode Fibre Optic Interferometers and Their Application in Sensing Systems." In Optical Fiber Sensors, 1–33. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3611-9_1.

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Díaz-Maroto Fernández, Patricia, Santiago Guerrero Vázquez, Jaime García Alonso, Alejandro Sánchez Sánchez, Carlos de Miguel, Manuel Iglesias Vallejo, and Daniel Iñesta González. "Dynamic Distributed Fibre Optic Sensing for Environmental and Operational Aircraft Monitoring." In Lecture Notes in Civil Engineering, 352–61. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-64908-1_33.

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Díaz-Maroto Fernández, Patricia, Santiago Guerrero Vázquez, Jaime García Alonso, Alejandro Sánchez Sánchez, Carlos de Miguel, Manuel Iglesias Vallejo, and Daniel Iñesta González. "Dynamic Distributed Fibre Optic Sensing for Environmental and Operational Aircraft Monitoring." In Lecture Notes in Civil Engineering, 352–61. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-64908-1_33.

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Buchmayer, Fabian, Christoph M. Monsberger, and Werner Lienhart. "Distributed Fibre Optic Sensing for Long-Term Monitoring of Tunnel Inner Linings in Anhydrite." In Lecture Notes in Civil Engineering, 825–37. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-74258-4_52.

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Tardy, A., M. Jurczyszyn, J. M. Caussignac, G. Morel, and G. Briant. "High Sensitivity Transducer for Fibre-Optic Pressure Sensing Applied to Dynamic Mechanical Testing and Vehicle Detection on Roads." In Springer Proceedings in Physics, 215–21. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-75088-5_33.

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Personick, Stewart D. "Sensing Systems." In Fiber Optics, 224–32. Boston, MA: Springer US, 1985. http://dx.doi.org/10.1007/978-1-4899-3478-9_12.

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Kim, Do-Hyun, and Jin U. Kang. "Fiber Optic Imagers." In Fiber Optic Sensing and Imaging, 55–90. New York, NY: Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-7482-1_3.

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Zhang, Nancy Meng Ying, Kaiwei Li, Miao Qi, and Zhifang Wu. "Hybrid Fiber-Optic Sensors." In Advanced Fiber Sensing Technologies, 13–38. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5507-7_2.

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Sharma, Utkarsh, and Xing Wei. "Fiber Optic Interferometric Devices." In Fiber Optic Sensing and Imaging, 29–53. New York, NY: Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-7482-1_2.

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Conference papers on the topic "Fibre Optic Sensing"

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Reutlinger, Arnd, Markus Glier, Karl-Heinz Zuknik, Lars Hoffmann, Mathias Müller, Stephan Rapp, Charles Kurvin, Thomas Ernst, Iain McKenzie, and Nikos Karafolas. "Fiber optic sensing for telecommunication satellites." In 19th International Conference on Optical Fibre Sensors. SPIE, 2008. http://dx.doi.org/10.1117/12.786186.

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Karamehmedovic, Emir, and Ulrich Glombitza. "Fibre optic distributed temperature sensing using IOFDR." In Second European Workshop on Optical Fibre Sensors. SPIE, 2004. http://dx.doi.org/10.1117/12.566628.

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Chen, Defei, Kun Huang, Xiangjuan Meng, Ju Liu, Bao Zhang, Tao Sun, Jianxin Shen, Junhui Wei, Hongjun Wu, and Qi Teng. "Real-Time Down-Hole Monitoring of Gas Injection Profile Using Fibre-Optic Distribute Temperature and Acoustic Sensing in Tarim." In International Petroleum Technology Conference. IPTC, 2021. http://dx.doi.org/10.2523/iptc-21177-ms.

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Abstract Gas injection has become an important means of enhancing oil recovery (EOR) in clastic reservoirs, the Donghe Oilfield, Tarim, has been undergoing gas injection to enhanced oil recovery. During the gas injection, dynamic justification of gas injection was the most severe challenges, which needed to monitor the pressure profile, temperature profile and gas injection profile. Therefore, monitoring gas injection profile has becoming an important part of gas drive reservoirs. Donghe Oilfield was characterized by ultra-deep (>6000m), high temperature (>140°C) and high content of carbon dioxide, conventional manometer and thermometer cannot meet the downhole condition of ultra-deep and high temperature. To continuously monitor gas injection well, permanent fibre-optic surveillance technique featured with outstanding conformance, nice corrosion resistance and long-life span was developed, and a program was developed to use real-time fiber-optic Distributed Temperature Sensing (DTS) and Distributed Acoustic sensing (DAS) to identify the gas injection profile (gas channeling). Monitoring principle and system assembly of the fibre-optic was demonstrated in detail, the DTS utilized Joule - Thompson cooling principle as the gas injected into formation through screen pipe, while the DAS captured the amplitude and frequency of acoustics from the gas flow. DTS and DAS data obtained at the same time by using fiber wireline outside the gas injection string during gas injection. There was a field application in gas injection well of DH1-H3 and gas injection profiles derived from DTS and DAS had the extremely high consistency to radioactive tracer profiles run at about the same time and under similar injection rates and pressure. The success of the fibre-optic surveillance in DH1-H3 exhibited great potential of fiber-optic sensing in gas injection EOR projects, which could provide a new and effective tool in identifying gas channeling.
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van der Horst, Juun, Hans den Boer, Peter in 't Panhuis, Roel Kusters, Dayeeta Roy, Andrew Ridge, and Alastair Godfrey. "Fibre Optic Sensing for Improved Wellbore Surveillance." In International Petroleum Technology Conference. International Petroleum Technology Conference, 2013. http://dx.doi.org/10.2523/iptc-16873-ms.

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Santos, J. L., L. A. Ferreira, F. M. Araújo, and O. Frazão. "Fibre optic modal interferometry for sensing applications." In Workshop on Specialty Optical Fibers and Their Applications (WSOF-10), edited by Juan Hernández-Cordero, Ismael Torres-Gómez, and Alexis Méndez. SPIE, 2010. http://dx.doi.org/10.1117/12.868138.

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Johnstone, Walter, Kevin J. McCallion, Nigel Langford, and A. Gloag. "Electro-optically tunable fibre lasers for fibre optic sensing systems." In 10th Optical Fibre Sensors Conference. SPIE, 1994. http://dx.doi.org/10.1117/12.185052.

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Feherty, Craig, Andrew Garioch, and Annabel Green. "Disposable Fibre Optic Intervention System: Case Study of Successful Leak Detection Offshore North Sea." In SPE Offshore Europe Conference & Exhibition. SPE, 2021. http://dx.doi.org/10.2118/205425-ms.

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Abstract Maintaining well integrity is critical to sustaining production from mature and aging fields. Disposable fibre optic technology has been deployed in wells in the North Sea to locate known tubing leaks in the completion. The disposable fibre optic intervention system releases a probe into the well to enable the deployment of bare fibre optic line. The fibres are released from the probe as it descends into the well. In the presented case study, the probe contained both single-mode and multi-mode fibre optic lines to enable simultaneous Distributed Temperature Sensing (DTS) and Distributed Acoustic Sensing (DAS) surveys to be performed. Once deployed in the well, pressure manipulation programs were performed to activate any tubing or casing leaks while acquiring DTS and DAS data. As a result of the exceptional sensitivity of the bare fibres and the effective coupling of the fibre with the tubing wall the technology is shown to be highly effective in detecting leaks and confirming barrier integrity. In the presented example a leak was located along with the direction and rate of the fluid movement in the ‘B’ annulus. The simplicity of the system and highly efficient operations greatly reduced survey times in comparison to conventional intervention techniques thereby greatly reducing the cost of intervention. It can be demonstrated that the disposable fibre optic deployment system provides a game changing and cost-effective solution for both leak detection and determining liquid levels in the wells. The disposable fibre solution is a unique deployment method which provides an alternative to conventional well surveys, reducing the complexity, time and cost to acquire valuable distributed well data. This is the first case history published for this technology in leak detection application.
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Bueker, Harald, and Friedrich W. Haesing. "Fiber optic radiation sensors." In Optical Fibre Sensing and Systems in Nuclear Environments, edited by Roger Van Geen, Francis Berghmans, and Marc C. Decreton. SPIE, 1994. http://dx.doi.org/10.1117/12.198629.

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Tapanes, E. "Dual-Purpose Fibre Optic System Providing Simultaneous, Real-Time Communications and Distributed Vibration Sensing for Pipeline Applications." In 1998 2nd International Pipeline Conference. American Society of Mechanical Engineers, 1998. http://dx.doi.org/10.1115/ipc1998-2013.

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A proprietary fibre optic sensing technology has been developed and is capable of simultaneously utilising an existing fibre optic communication cable as an integrity-testing sensing cable, thus providing continuous, real-time monitoring of the fibre cable and any structure near the cable (ie., ground, tunnels, ducts, pipes, buildings, equipment, vessels, etc.). With this system, simultaneous fibre optic communications and real-time vibration monitoring was demonstrated using a wavelength multiplexed fibre system for a channel bandwidth of 500 MHz over 18 km of standard singlemode fibre. Real-time vibration monitoring was also demonstrated using standard singlemode and multimode fibre over lengths of 28 km and 53 km, respectively. Trials of the system are currently underway in Australia and the first commercial field installation with this capability is to be completed in mid-1998 in Indonesia. This paper highlights the benefits and potential of this dual-capacity system and details results obtained to-date.
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Huff, David B., and Michael S. Lebby. "Fiber optic sensing technology: emerging markets and trends." In Third European Workshop on Optical Fibre Sensors. SPIE, 2007. http://dx.doi.org/10.1117/12.738328.

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Reports on the topic "Fibre Optic Sensing"

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Bellefleur, G., E. Schetselaar, and D. White. Seismic imaging of porphyry deposits with distributed acoustic sensing of fibre-optic cables: a summary of results at the New Afton Cu-Au mine, British Columbia. Natural Resources Canada/CMSS/Information Management, 2021. http://dx.doi.org/10.4095/327942.

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Milnes, M., L. C. Baylor, and S. Bave. Fiber-Optic Sensing Technology. Office of Scientific and Technical Information (OSTI), October 1996. http://dx.doi.org/10.2172/405754.

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Juntao Wu. Distributed Fiber Optic Gas Sensing for Harsh Environment. Office of Scientific and Technical Information (OSTI), March 2008. http://dx.doi.org/10.2172/938805.

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Quinn, Meghan. Geotechnical effects on fiber optic distributed acoustic sensing performance. Engineer Research and Development Center (U.S.), July 2021. http://dx.doi.org/10.21079/11681/41325.

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Abstract:
Distributed Acoustic Sensing (DAS) is a fiber optic sensing system that is used for vibration monitoring. At a minimum, DAS is composed of a fiber optic cable and an optic analyzer called an interrogator. The oil and gas industry has used DAS for over a decade to monitor infrastructure such as pipelines for leaks, and in recent years changes in DAS performance over time have been observed for DAS arrays that are buried in the ground. This dissertation investigates the effect that soil type, soil temperature, soil moisture, time in-situ, and vehicle loading have on DAS performance for fiber optic cables buried in soil. This was accomplished through a field testing program involving two newly installed DAS arrays. For the first installation, a new portion of DAS array was added to an existing DAS array installed a decade prior. The new portion of the DAS array was installed in four different soil types: native fill, sand, gravel, and an excavatable flowable fill. Soil moisture and temperature sensors were buried adjacent to the fiber optic cable to monitor seasonal environmental changes over time. Periodic impact testing was performed at set locations along the DAS array for over one year. A second, temporary DAS array was installed to test the effect of vehicle loading on DAS performance. Signal to Noise Ratio (SNR) of the DAS response was used for all the tests to evaluate the system performance. The results of the impact testing program indicated that the portions of the array in gravel performed more consistently over time. Changes in soil moisture or soil temperature did not appear to affect DAS performance. The results also indicated that time DAS performance does change somewhat over time. Performance variance increased in new portions of array in all material types through time. The SNR in portions of the DAS array in native silty sand material dropped slightly, while the SNR in portions of the array in sand fill and flowable fill material decreased significantly over time. This significant change in performance occurred while testing halted from March 2020 to August 2020 due to the Covid-19 pandemic. These significant changes in performance were observed in the new portion of test bed, while the performance of the prior installation remained consistent. It may be that, after some time in-situ, SNR in a DAS array will reach a steady state. Though it is unfortunate that testing was on pause while changes in DAS performance developed, the observed changes emphasize the potential of DAS to be used for infrastructure change-detection monitoring. In the temporary test bed, increasing vehicle loads were observed to increase DAS performance, although there was considerable variability in the measured SNR. The significant variation in DAS response is likely due to various industrial activities on-site and some disturbance to the array while on-boarding and off-boarding vehicles. The results of this experiment indicated that the presence of load on less than 10% of an array channel length may improve DAS performance. Overall, this dissertation provides guidance that can help inform the civil engineering community with respect to installation design recommendations related to DAS used for infrastructure monitoring.
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Pfeifer, K., and M. Butler. A fiber optic weight monitor for intrusion sensing applications. Office of Scientific and Technical Information (OSTI), November 1989. http://dx.doi.org/10.2172/5363704.

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Challener, William A. Multiparameter fiber optic sensing system for monitoring enhanced geothermal systems. Office of Scientific and Technical Information (OSTI), December 2014. http://dx.doi.org/10.2172/1056480.

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Kennedy, Jermaine L. Fiber-Optic Sensor with Simultaneous Temperature, Pressure, and Chemical Sensing Capabilities. Office of Scientific and Technical Information (OSTI), March 2009. http://dx.doi.org/10.2172/949037.

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Becker, Matthew. Phase I Project: Fiber Optic Distributed Acoustic Sensing for Periodic Hydraulic Tests. Office of Scientific and Technical Information (OSTI), December 2017. http://dx.doi.org/10.2172/1430694.

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Wang, Anbo. Embedded Active Fiber Optic Sensing Network for Structural Health Monitoring in Harsh Environments. Office of Scientific and Technical Information (OSTI), September 2016. http://dx.doi.org/10.2172/1406405.

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Bruno, Michael S., Kang Lao, Nicky Oliver, and Matthew Becker. Use of Fiber Optic Distributed Acoustic Sensing for Measuring Hydraulic Connectivity for Geothermal Applications. Office of Scientific and Technical Information (OSTI), April 2018. http://dx.doi.org/10.2172/1434494.

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