Prof. Stephen W. James Profile

Prof. Stephen W. James

Professor of Applied Optics at Cranfield Univ

SPIE Involvement:

Author

Publications (101)

Proceedings Article | 15 August 2023 Presentation + Paper

A fibre optic angle sensing tape for applications in robotics and automation

Sivaji Pillai, Thomas O. Charrett, Thomas Kissinger, Stephen James, Ralph Tatam

Proceedings Volume 12618, 126180D (2023) https://doi.org/10.1117/12.2673185

KEYWORDS: Robots, Interferometers, Optical fibers, Robotics, Optical sensing, Fiber optics, Automation, Interferometry

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Proceedings Article | 23 May 2023 Paper

The use of range-resolved interferometry for multi-parameter sensing in a wind tunnel

James Barrington, Stephen James, Thomas Kissinger, Stephen Staines, Simon Prince, Erica Alucsa-Saeza, Nicholas Lawson, Ralph Tatam

Proceedings Volume 12643, 1264303 (2023) https://doi.org/10.1117/12.2679414

KEYWORDS: Sensors, Signal processing, Optical fibers, Interferometry, Vibration, Engineering, Vibrometry

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Proceedings Article | 28 August 2019 Paper

Ground vibration testing of a helicopter rotor blade using optical fibre sensors

Thomas Kissinger, Simone Weber, Edmond Chehura, James Barrington, Stephen Staines, Stephen James, Mudassir Lone, Ralph Tatam

Proceedings Volume 11199, 1119902 (2019) https://doi.org/10.1117/12.2538810

KEYWORDS: Sensors, Optical fibers, Fiber Bragg gratings, Adhesives, Structured optical fibers, Reflectors, Optical sensing, Optical components, Interferometry, 3D modeling

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Proceedings Article | 26 June 2017 Paper

Interferometric fibre-optic curvature sensing for structural, directional vibration measurements

Thomas Kissinger, Edmon Chehura, Stephen James, Ralph Tatam

Proceedings Volume 10329, 1032925 (2017) https://doi.org/10.1117/12.2269985

KEYWORDS: Interferometry, Vibrometry, Sensors, Structured optical fibers, Multiplexing, Fiber optics sensors, Fiber Bragg gratings, Phase measurement, Sensing systems, Optical fibers

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Proceedings Article | 23 April 2017 Paper

Metal-organic framework thin films on a surface of optical fibre long period grating for chemical sensing

J. Hromadka, B. Tokay, S. James, S. Korposh

Proceedings Volume 10323, 103234C (2017) https://doi.org/10.1117/12.2265589

KEYWORDS: Thin films, Optical fibers, Metals, Micro optical fluidics, Biological and chemical sensing, Sensors, Cladding, Chemical analysis, Copper

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Proceedings Article | 23 April 2017 Paper

Optimised process for fabricating tapered long period gratings

K. Mullaney, S. Staines, S. James, R. Tatam

Proceedings Volume 10323, 103232C (2017) https://doi.org/10.1117/12.2263275

KEYWORDS: Gas lasers, Carbon monoxide, Modulation, Laser stabilization, Carbon dioxide lasers, Control systems, Fabrication, Optical fibers, Laser processing, Optical components

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Proceedings Article | 23 April 2017 Paper

Monitoring the fabrication of tapered optical fibres

K. Mullaney, R. Correia, S. Staines, S. James, R. Tatam

Proceedings Volume 10323, 103232D (2017) https://doi.org/10.1117/12.2263285

KEYWORDS: Cameras, Gas lasers, Fiber Bragg gratings, Optical fibers, Carbon monoxide, Near infrared, Tapered optical fibers, Optical alignment, Fabrication, Sensors

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Proceedings Article | 23 April 2017 Paper

Multiplexing curvature sensors using fibre segment interferometry for lateral vibration measurements

Thomas Kissinger, Edmon Chehura, Stephen James, Ralph Tatam

Proceedings Volume 10323, 1032317 (2017) https://doi.org/10.1117/12.2264781

KEYWORDS: Phase measurement, Silicon, Interferometry, Sensors, Structured optical fibers, Multiplexing, Vibrometry, Fiber optics sensors, Fiber Bragg gratings, Reflectors

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Proceedings Article | 23 April 2017 Paper

Multi-parameter measurements using optical fibre long period gratings for indoor air quality monitoring

J. Hromadka, S. Korposh, M. Partridge, S. James, F. Davis, D. Crump, S.-W. Lee, R. Tatam

Proceedings Volume 10323, 103233J (2017) https://doi.org/10.1117/12.2265055

KEYWORDS: Fiber optics sensors, Phase matching, Coating, Sensors, Multiplexing, Optical fibers, Humidity, Optical testing, Temperature metrology, Environmental sensing

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Proceedings Article | 23 April 2017 Paper

Soil moisture content measurement using optical fiber long period gratings

J. Hallett, M. Partridge, S. James, D. Tiwari, T. Farewell, S. Hallett, R. Tatam

Proceedings Volume 10323, 103232J (2017) https://doi.org/10.1117/12.2263427

KEYWORDS: Soil science, Sensors, Optical fibers, Optical testing, Water, Refractive index, Agriculture, Packaging, Prototyping, Fiber optics sensors

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Proceedings Article | 23 April 2017 Paper

Fibre Bragg grating sensors for the analysis of pressure distribution at a disc brake/pad interface

B. Major, D. Tiwari, R. Correia, S. James, M. Tirovic, R. Tatam

Proceedings Volume 10323, 103232O (2017) https://doi.org/10.1117/12.2263455

KEYWORDS: Safety, Data acquisition, Signal processing, Photonics, Reliability, Manufacturing, Fiber Bragg gratings, Sensors, Interfaces, Optical fibers

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Proceedings Article | 28 February 2017 Paper

Highly sensitive and selective biosensor based on graphene oxide coated long period grating

M. S. Shaikh, C. Liu, M. Partridge, S. James, W. D. Zhu, X. Chen

Proceedings Volume 10058, 100580G (2017) https://doi.org/10.1117/12.2252371

KEYWORDS: Biosensors, Graphene, Optical fibers, Signal detection, Optical properties, Sensors, Biosensing, Cladding, Biological research, Chemical analysis

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Proceedings Article | 27 January 2017 Paper

Biomedical application of optical fibre sensors

S. Korposh, S.-W. Lee, S. James, R. Tatam, S. Morgan

Proceedings Volume 10111, 101112Y (2017) https://doi.org/10.1117/12.2243640

KEYWORDS: Optical fibers, Sensors, Medicine, Biomedical optics, Fiber Bragg gratings, Refractive index, 3D modeling, Medical devices, Cladding, Blood

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Proceedings Article | 30 May 2016 Paper

Ammonia sensing using lossy mode resonances in a tapered optical fibre coated with porphyrin-incorporated titanium dioxide

Divya Tiwari, Kevin Mullaney, Serhiy Korposh, Stephen James, Seung-Woo Lee, Ralph Tatam

Proceedings Volume 9916, 99161H (2016) https://doi.org/10.1117/12.2236926

KEYWORDS: Titanium dioxide, Coating, Titanium, Tapered optical fibers, Sensors, Biological and chemical sensing, Optical fibers, Signal attenuation, Thin films, Water, Light sources

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Proceedings Article | 30 May 2016 Paper

Highly sensitive contact pressure measurements using FBG patch in endotracheal tube cuff

R. Correia, O. Blackman, F. Hernandez, S. Korposh, S. Morgan, B. Hayes-Gill, S. James, D. Evans, A. Norris

Proceedings Volume 9916, 99161F (2016) https://doi.org/10.1117/12.2236859

KEYWORDS: Fiber Bragg gratings, Sensors, 3D modeling, Optical design, Optical fibers, Epoxies, Polymers, 3D metrology, Temperature metrology, Environmental sensing, Calibration

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Proceedings Article | 30 May 2016 Paper

Interrogation of fibre Bragg gratings through a fibre optic rotary joint on a geotechnical centrifuge

Ricardo Correia, Stephen James, Alec Marshall, Charles Heron, Sergiy Korposh

Proceedings Volume 9916, 99162B (2016) https://doi.org/10.1117/12.2236979

KEYWORDS: Fiber Bragg gratings, Fiber optics, Sensor performance, Sensors, Aluminum, Multiplexing, Distributed computing, Mechanical sensors, Modulation, Optical fibers, Data acquisition, Channel projecting optics, Civil engineering

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Proceedings Article | 28 September 2015 Paper

Detection of volatile organic compounds using optical fibre long period grating modified with metal organic framework thin films

Jiri Hromadka, Begum Tokay, Sergiy Korposh, Stephen James, Ralph Tatam

Proceedings Volume 9634, 96344N (2015) https://doi.org/10.1117/12.2194110

KEYWORDS: Optical fibers, Micro optical fluidics, Sensors, Cladding, Metals, Bioalcohols, Thin films, Chemical analysis, Environmental sensing, Crystals

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Proceedings Article | 28 September 2015 Paper

Photodecomposition of a target compound detected using an optical fibre long period grating coated with a molecularly imprinted titania thin film

R. Wong, S. Korposh, S.-W. Lee, S. James, R. Tatam

Proceedings Volume 9634, 96340Y (2015) https://doi.org/10.1117/12.2192325

KEYWORDS: Thin films, Optical fibers, Ultraviolet radiation, Target detection, Refractive index, Liquids, Ocean optics, Absorption, Time metrology, Titanium dioxide

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Proceedings Article | 28 September 2015 Paper

Range-resolved signal processing for fibre segment interferometry applied to dynamic long-gauge length strain sensing

Thomas Kissinger, Ricardo Correia, Thomas Charrett, Stephen James, Ralph Tatam

Proceedings Volume 9634, 96341Q (2015) https://doi.org/10.1117/12.2194347

KEYWORDS: Interferometry, Signal processing, Sensors, Reflectors, Modulation, Fiber Bragg gratings, Frequency modulation, Neodymium, Optical fibers, Acoustics

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Proceedings Article | 28 September 2015 Paper

Measurements of endotracheal tube cuff contact pressure using fibre Bragg gratings

F. Hernandez , R. Correia, S. Korposh, S. Morgan, B. Hayes-Gill, S. James, D. Evans, A. Norris

Proceedings Volume 9634, 963435 (2015) https://doi.org/10.1117/12.2195118

KEYWORDS: Fiber Bragg gratings, Sensors, Optical fibers, Data modeling, Free space, Performance modeling, Blood circulation, Biomedical optics, Interfaces, Lung

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Proceedings Article | 28 September 2015 Paper

Dissolved oxygen sensing using an optical fibre long period grating coated with hemoglobin

M. Partridge, S. James, R. Tatam

Proceedings Volume 9634, 96342S (2015) https://doi.org/10.1117/12.2194752

KEYWORDS: Sensors, Oxygen, Optical fibers, Sodium, Optical sensing, Refractive index, Optical coatings, Carbon dioxide, Fiber optics sensors, Proteins

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Proceedings Article | 28 September 2015 Paper

Detection of the volatile organic compounds emitted from paints using optical fibre long period grating modified with the mesoporous nano-scale coating

Jiri Hromadka, Stephen James, Frank Davis, Ralph Tatam, Derrick Crump, Sergiy Korposh

Proceedings Volume 9634, 96344K (2015) https://doi.org/10.1117/12.2195035

KEYWORDS: Sensors, Optical fibers, Coating, Silica, Cladding, Environmental sensing, Standards development, Refractive index, Thin films, Phase matching

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Proceedings Article | 1 July 2015 Paper

Long period grating sensors response to photosensitive bacteriorhodopsin coating

M. Partridge, S. Korposh, S. James, R. Tatam

Proceedings Volume 9655, 965535 (2015) https://doi.org/10.1117/12.2184466

KEYWORDS: Coating, Bromine, Sensors, Optical fibers, Refractive index, Fiber coatings, Chemical fiber sensors, Diode pumped solid state lasers, Optical properties, Fiber optics sensors

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Proceedings Article | 1 July 2015 Paper

Chirality measurements using optical fibre long period gratings fabricated in high birefringent fibre

S. Korposh, R. Tatam, S. James, S.-W. Lee

Proceedings Volume 9655, 965533 (2015) https://doi.org/10.1117/12.2184441

KEYWORDS: Optical fibers, Glucose, Polarization, Refractive index, Cladding, Sensors, Optical testing, Water, Environmental sensing, Ocean optics

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Proceedings Article | 1 July 2015 Paper

U-shaped evanescent wave optical fibre sensor based on a porphyrin anchored nanoassembled thin film for high sensitivity ammonia detection

S. Korposh, H. Okuda, T. Wang, S. James, S.-W. Lee

Proceedings Volume 9655, 965518 (2015) https://doi.org/10.1117/12.2184438

KEYWORDS: Optical fibers, Sensors, Wave sensors, Thin films, Absorption, Optical coatings, Environmental sensing, Optical sensors, Absorbance, Humidity

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Proceedings Article | 1 July 2015 Paper

Optical fiber sensing of human skin emanations

S.-W. Lee, T. Wang, R. Selyanchyn, S. Korposh, S. James

Proceedings Volume 9655, 96551K (2015) https://doi.org/10.1117/12.2184411

KEYWORDS: Skin, Humidity, Sensors, Optical fibers, Tissue optics, Principal component analysis, Optical sensors, Ocean optics, Absorption, Optical sensing

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Proceedings Article | 1 July 2015 Paper

A high-sensitivity chemical sensor based on titania coated optical-fiber long period grating for ammonia sensing in water

D. Tiwari, S. James, R. Tatam, S. Korposh, S. Lee

Proceedings Volume 9655, 96552H (2015) https://doi.org/10.1117/12.2184260

KEYWORDS: Sensors, Optical coatings, Cladding, Optical fibers, Silica, Nanoparticles, Biological and chemical sensing, Chemical fiber sensors, Titanium dioxide, Phase matching

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Proceedings Article | 22 June 2015 Paper

Simultaneous laser vibrometry on multiple surfaces with a single beam system using range-resolved interferometry

Thomas Kissinger, Thomas O. Charrett, Stephen James, Alvin Adams, Andrew Twin, Ralph Tatam

Proceedings Volume 9525, 952520 (2015) https://doi.org/10.1117/12.2183281

KEYWORDS: Interferometry, Vibrometry, Modulation, Sensors, Signal processing, Frequency modulation, Optical testing, Semiconductor lasers, Interferometers, Phase shift keying

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Proceedings Article | 2 June 2014 Paper

Transverse strain response of in-fibre Fabry-Perot microcavities

Mark Manders, Matthew Partridge, Ricardo Correia, Stephen James, Ralph Tatam

Proceedings Volume 9157, 91571O (2014) https://doi.org/10.1117/12.2059615

KEYWORDS: Optical microcavities, Fabry–Perot interferometers, Sensors, Fabry–Perot interferometry, Photonic crystal fibers, Polarization, Photonics, Fusion splicing, Ocean optics, Spectroscopy

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Proceedings Article | 2 June 2014 Paper

Temperature and surrounding refractive index insensitive cascaded long period grating chemical sensor

S. Korposh, S. James, Seung-Woo Lee, R. Tatam

Proceedings Volume 9157, 91574J (2014) https://doi.org/10.1117/12.2059031

KEYWORDS: Refractive index, Cladding, Chemical fiber sensors, Temperature metrology, Neodymium, Sensors, Silica, Coating, Environmental sensing, Phase matching

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Proceedings Article | 2 June 2014 Paper

Wind tunnel unsteady pressure measurements using a differential optical fiber Fabry-Perot pressure sensor

Ricardo Correia, Stephen Staines, Stephen James, Nicholas Lawson, Kevin Garry, Ralph Tatam

Proceedings Volume 9157, 915709 (2014) https://doi.org/10.1117/12.2059631

KEYWORDS: Sensors, Fabry–Perot interferometers, 3D modeling, Optical fibers, Reverse modeling, Protactinium, Solid modeling, Zirconium dioxide, Fiber optics, Calibration

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Proceedings Article | 2 June 2014 Paper

Sensitive protein detection using an optical fibre long period grating sensor anchored with silica core gold shell nanoparticles

L. Marques, F. Hernandez, S. Korposh, M. Clark, S. Morgan, S. James, R. Tatam

Proceedings Volume 9157, 91574S (2014) https://doi.org/10.1117/12.2059196

KEYWORDS: Sensors, Nanoparticles, Gold, Optical fibers, Silica, Proteins, Coating, Cladding, Biosensors, Phase matching

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Proceedings Article | 2 June 2014 Paper

Evaluation of the optical switching characteristics of erbium-doped fibres for the development of a fibre Bragg grating sensor interrogator

Evangelos Rigas, R. Correia, N. Stathopoulos, S. Savaidis, S. James, D. Bhattacharyya, P. Kirby, R. Tatam

Proceedings Volume 9157, 91571M (2014) https://doi.org/10.1117/12.2059607

KEYWORDS: Fiber Bragg gratings, Sensors, Optical switching, Switching, Microelectromechanical systems, Switches, Fiber characterization, Fiber optics sensors, Wavelength division multiplexing, Multiplexing

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Proceedings Article | 27 February 2014 Paper

Bragg-grating-stabilized external cavity lasers for gas sensing using tunable diode laser spectroscopy

S. G. Lynch, F. Chen, J. Gates, C. Holmes, S. Staines, S. James, J. Hodgkinson, P. Smith, R. Tatam

Proceedings Volume 9002, 900209 (2014) https://doi.org/10.1117/12.2039971

KEYWORDS: Fiber Bragg gratings, Semiconductor lasers, Tunable lasers, Laser stabilization, Absorption, Optical fibers, Gas lasers, Fiber lasers, Laser spectroscopy, Spectroscopy

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Proceedings Article | 20 May 2013 Paper

Temperature and thermo-optic coefficient measurements using optical fibre long period gratings operating at phase matching turning point

S. Korposh, R. Wong, S. James, R. Tatam

Proceedings Volume 8794, 87942N (2013) https://doi.org/10.1117/12.2026599

KEYWORDS: Temperature metrology, Sensors, Optical fibers, Thermal optics, Refractive index, Cladding, Bioalcohols, Optical testing, Ocean optics, Phase matching

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Proceedings Article | 20 May 2013 Paper

Detection of volatile organic compounds (VOCs) using an optical fibre long period grating with a calixarene anchored mesoporous thin film

S. Korposh, F. Davis, S. James, T. Wang, S.-W. Lee, S. Higson, R. Tatam

Proceedings Volume 8794, 87941I (2013) https://doi.org/10.1117/12.2026270

KEYWORDS: Sensors, Optical fibers, Thin films, Silica, Cladding, Refractive index, Humidity, Optical coatings, Nanoparticles, Phase matching

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Proceedings Article | 23 April 2013 Paper

Multiplexed fibre optic sensors for monitoring resin infusion, flow, and cure in composite material processing

Edmon Chehura, Renata Jarzebinska, Elisabete F. Da Costa, Alexandros Skordos, Stephen James, Ivana Partridge, Ralph Tatam

Proceedings Volume 8693, 86930F (2013) https://doi.org/10.1117/12.2012214

KEYWORDS: Sensors, Refractive index, Composites, Fiber Bragg gratings, Optical fibers, Carbon, Multiplexing, Fiber optics sensors, Cladding, Signal attenuation

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Proceedings Article | 11 April 2013 Paper

A chirped long period grating sensor for monitoring flow direction and cure of a resin

Rebecca Y. Wong, Edmond Chehura, Stephen James, Ralph Tatam

Proceedings Volume 8693, 86930E (2013) https://doi.org/10.1117/12.2009369

KEYWORDS: Refractive index, Cladding, Signal attenuation, Sensors, Composites, Optical fibers, Epoxies, Liquids, Fiber optics, Aerospace engineering

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Proceedings Article | 7 November 2012 Paper

On-line load monitoring of a tufting needle using optical fibre Bragg grating sensors

Edmon Chehura, Giuseppe Dell'Anno, Tristan Huet, Stephen Staines, Stephen James, Ivana Partridge, Ralph Tatam

Proceedings Volume 8421, 8421AC (2012) https://doi.org/10.1117/12.965552

KEYWORDS: Fiber Bragg gratings, Sensors, Optical fibers, Carbon, Head, Composites, Foam, Resistance, Fiber couplers, Data acquisition

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Proceedings Article | 17 October 2012 Paper

Toward track component condition monitoring using optical fibre Bragg grating sensors

S. Buggy, S. James, S. Staines, R. Carroll, P. Kitson, D. Farrington, L. Drewett, J. Jaiswal, R. Tatam

Proceedings Volume 8421, 84213M (2012) https://doi.org/10.1117/12.965553

KEYWORDS: Sensors, Fiber Bragg gratings, Switches, Optical fibers, Optical tracking, Velocity measurements, Photography, Photonics, Roads, Sensing systems

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Proceedings Article | 17 October 2012 Paper

A 1.65 µm region external cavity laser diode using an InP gain chip and a fibre Bragg grating

F. Chen, J. Hodgkinson, S. Staines, S. James, R. Tatam

Proceedings Volume 8421, 84215F (2012) https://doi.org/10.1117/12.975302

KEYWORDS: Fiber Bragg gratings, Semiconductor lasers, Methane, Absorption, Diodes, Semiconductors, Vertical cavity surface emitting lasers, Reflectivity, Spectroscopy, Wavelength tuning

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Proceedings Article | 17 October 2012 Paper

Multiplexing tapered optical fibres using coherent optical frequency domain reflectometry

Renata Jarzebinska, Edmon Chehura, Stephen James, Ralph Tatam

Proceedings Volume 8421, 84212K (2012) https://doi.org/10.1117/12.965549

KEYWORDS: Optical fibers, Refractive index, Reflectometry, Signal attenuation, Tapered optical fibers, Sensors, Multiplexing, Optical arrays, Liquids, Backscatter

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Proceedings Article | 18 May 2011 Paper

Refractive index sensitivity of fibre optic long period gratings with SiO2 nanoparticle based mesoporous coatings

Sergiy Korposh, Seung-Woo Lee, Stephen James, Ralph Tatam

Proceedings Volume 7753, 77539A (2011) https://doi.org/10.1117/12.884777

KEYWORDS: Refractive index, Optical coatings, Silica, Cladding, Fiber optics, Nanoparticles, Optical fibers, Fiber optics sensors, Etching, Phase matching

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Proceedings Article | 9 September 2010 Paper

A fibre Bragg grating-based inclinometer system for ground movement measurement

Jin Li, Ricardo Correia, Edmond Chehura, Stephen Staines, Stephen James, Ralph Tatam

Proceedings Volume 7653, 765314 (2010) https://doi.org/10.1117/12.866334

KEYWORDS: Fiber Bragg gratings, Sensors, Fiber optics, Fiber optics sensors, Optical fibers, Connectors, Lithium, Photonics, Landslides, Electromagnetic interference

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Proceedings Article | 9 September 2010 Paper

Ammonia sensing using a fibre optic long period grating with a porous nanostructured coating formed from silica nanospheres

S. Korposh, W. Batty, S. Kodaira, S.-W. Lee, S. James, S. Topliss, R. Tatam

Proceedings Volume 7653, 76531D (2010) https://doi.org/10.1117/12.866326

KEYWORDS: Coating, Refractive index, Silica, Cladding, Water, Sensors, Fiber optics, Nanostructuring, Multilayers, Phase matching

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Proceedings Article | 5 October 2009 Paper

Field monitoring of static, dynamic, and statnamic pile loading tests using fibre Bragg grating strain sensors

Jin Li, Ricardo Correia, Edmon Chehura, Stephen Staines, Stephen James, Ralph Tatam, Antony Butcher, Raul Fuentes

Proceedings Volume 7503, 75034O (2009) https://doi.org/10.1117/12.835360

KEYWORDS: Fiber Bragg gratings, Sensors, Multiplexing, Head, Resistance, Solids, Demodulation, Optical fibers, Photonics, Environmental monitoring

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Proceedings Article | 5 October 2009 Paper

A simple method for fabricating phase-shifted fibre Bragg gratings with flexible choice of centre wavelength

Edmon Chehura, Stephen James, Ralph Tatam

Proceedings Volume 7503, 750379 (2009) https://doi.org/10.1117/12.835466

KEYWORDS: Fiber Bragg gratings, Fabrication, Reflectivity, Phase shifts, Sensors, Refractive index, Ultraviolet radiation, Mirrors, Standards development, Beam splitters

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Proceedings Article | 5 October 2009 Paper

Fibre Bragg grating based effective soil pressure sensor for geotechnical applications

Ricardo Correia, Jin Li, Stephen Staines, Edmon Chehura, Stephen James, Joel Kutner, Paul Dewhurst, Pedro Ferreira, Ralph Tatam

Proceedings Volume 7503, 75030F (2009) https://doi.org/10.1117/12.835751

KEYWORDS: Sensors, Fiber Bragg gratings, Soil science, Calibration, Sensor calibration, Particles, Fiber optics, Mechanics, Multiplexing, Interferometry

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Proceedings Article | 5 October 2009 Paper

Response of a fibre optic long period grating operating at the phase matching turning point to the deposition of a nanostructured coating

S. James, S. Topliss, S. Cheung, R. Tatam

Proceedings Volume 7503, 750362 (2009) https://doi.org/10.1117/12.834725

KEYWORDS: Coating, Cladding, Refractive index, Nanostructuring, Fiber optics, Optical fibers, Signal attenuation, Sensors, Optical properties, Phase matching

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Proceedings Article | 5 October 2009 Paper

Multicomponent strain development in superconducting magnet coils using optical fibre grating sensors fabricated in highly linearly birefringent fibre

Edmon Chehura, Stephen James, Andrew Twin, Fred Domptail, R. Tatam

Proceedings Volume 7503, 75035J (2009) https://doi.org/10.1117/12.835727

KEYWORDS: Sensors, Fiber Bragg gratings, Superconductors, Magnetic sensors, Optical fibers, Helium, Refractive index, Glasses, Magnetism, Magnetic resonance imaging

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Proceedings Article | 5 October 2009 Paper

Species selective vapour sensing of organic compounds using dual resonant long period fibre gratings with a calixarene coating

S. Topliss, S. James, F. Davis, S. P. Higson, R. Tatam

Proceedings Volume 7503, 75031I (2009) https://doi.org/10.1117/12.834707

KEYWORDS: Coating, Molecules, Sensors, Refractive index, Cladding, Molecular interactions, Nanostructuring, Water, Signal attenuation, Phase matching

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Proceedings Article | 5 October 2009 Paper

Pressure measurements on aircraft wing using phase-shifted fibre Bragg grating sensors

Edmon Chehura, Stephen James, Nicholas Lawson, Kevin Garry, Ralph Tatam

Proceedings Volume 7503, 750334 (2009) https://doi.org/10.1117/12.835469

KEYWORDS: Sensors, Fiber Bragg gratings, Optical fibers, Calibration, Skin, Epoxies, Fiber optics sensors, Phase shifts, Aerodynamics, Reflection

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Proceedings Article | 11 August 2008 Paper

Development of a multi-component shearography instrument for surface strain measurement on dynamic objects

D. Francis, S. James, R. Tatam

Proceedings Volume 7063, 706308 (2008) https://doi.org/10.1117/12.796273

KEYWORDS: Cameras, Phase measurement, Shearography, Interferometers, Composites, CCD cameras, Fringe analysis, Image processing, Mirrors, Shearing interferometers

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Proceedings Article | 16 May 2008 Paper

A long period grating based directional flow sensor

Stephen Buggy, Stephen James, Ralph Tatam

Proceedings Volume 7004, 70045P (2008) https://doi.org/10.1117/12.786558

KEYWORDS: Sensors, Refractive index, Cladding, Signal attenuation, Liquids, Composites, Structured optical fibers, Manufacturing, Hydrogen, Nd:YAG lasers

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Proceedings Article | 16 May 2008 Paper

Response of the transmission spectrum of tapered optical fibres to the deposition of a nanostructured coating

R. Jarzebinska, C. Cheung, S. James, G. Ashwell, R. Tatam

Proceedings Volume 7004, 70045L (2008) https://doi.org/10.1117/12.786547

KEYWORDS: Coating, Nanostructuring, Tapered optical fibers, Optical fibers, Waveguides, Sensors, Nano coatings, Optical properties, Control systems, Visibility

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Proceedings Article | 16 May 2008 Paper

A transverse loading technique to enhance the pressure measurement capability of fibre Bragg gratings

R. Correia, E. Chehura, S. James, R. Tatam

Proceedings Volume 7004, 70045Q (2008) https://doi.org/10.1117/12.786559

KEYWORDS: Fiber Bragg gratings, Epoxies, Optical fibers, Birefringence, Sensors, Phase modulation, Phase shifts, Fiber optics, Polarization, Directional couplers

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Proceedings Article | 16 May 2008 Paper

Surface strain measurement of rotating objects using shearography instrumentation based on fibre-optic imaging bundles

D. Francis, S. James, R. Tatam

Proceedings Volume 7004, 70043U (2008) https://doi.org/10.1117/12.786785

KEYWORDS: Shearography, Speckle pattern, CCD cameras, Pulsed laser operation, Shearing interferometers, Speckle, Cameras, Fourier transforms, Aluminum, Interferometry

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Proceedings Article | 2 July 2007 Paper

Cure monitoring of a UV cured epoxy resin using a long period grating Mach-Zehnder interferometer

Stephen Buggy, Richard Murphy, Stephen James, Ralph Tatam

Proceedings Volume 6619, 66190V (2007) https://doi.org/10.1117/12.738364

KEYWORDS: Refractive index, Cladding, Epoxies, Ultraviolet radiation, Phase shifts, Optical fibers, Signal attenuation, Mach-Zehnder interferometers, Fringe analysis, Photodiodes

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Proceedings Article | 2 July 2007 Paper

Simultaneous independent measurement of temperature and strain using a tilted fibre Bragg grating

Edmon Chehura, Stephen James, Ralph Tatam

Proceedings Volume 6619, 66190I (2007) https://doi.org/10.1117/12.738371

KEYWORDS: Fiber Bragg gratings, Temperature metrology, Cladding, Sensors, Optical fibers, Packaging, Hydrogen, Refractive index, Modulation, Wave propagation

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Proceedings Article | 2 July 2007 Paper

Nested long period grating interferometers

Richard Murphy, Stephen James, Ralph Tatam

Proceedings Volume 6619, 66193G (2007) https://doi.org/10.1117/12.738589

KEYWORDS: Interferometers, Cladding, Refractive index, Mach-Zehnder interferometers, Optical fibers, Modulation, Signal attenuation, Fiber optics, Multiplexing, Sensors

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Proceedings Article | 2 July 2007 Paper

Transversely loaded fibre Bragg grating for pressure measurements

Ricardo Correia, Edmon Chehura, Stephen James, Ralph Tatam

Proceedings Volume 6619, 66191A (2007) https://doi.org/10.1117/12.738391

KEYWORDS: Fiber Bragg gratings, Sensors, Reflectivity, Structured optical fibers, Temperature metrology, Optical fibers, Birefringence, Directional couplers, Data acquisition, Data analysis

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Proceedings Article | 18 June 2007 Paper

Measurement of surface strain using multi-component pulsed laser shearography with coherent fibre-optic bundles

D. Francis, S. James, R. Tatam

Proceedings Volume 6616, 66162S (2007) https://doi.org/10.1117/12.725444

KEYWORDS: Shearography, Mirrors, Cameras, Fringe analysis, Pulsed laser operation, CCD cameras, Phase measurement, Speckle pattern, Image processing, Shearing interferometers

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Proceedings Article | 18 June 2007 Paper

Fibre grating refractometer sensors for composite process monitoring.

Stephen Buggy, Edmond Chehura, Alexandros Skordos, Athanasios Dimopoulos, Stephen James, Ivana Partridge, Ralph Tatam

Proceedings Volume 6616, 661635 (2007) https://doi.org/10.1117/12.725989

KEYWORDS: Refractive index, Cladding, Sensors, Signal attenuation, Optical fibers, Epoxies, Fiber Bragg gratings, Ultraviolet radiation, Refraction, Composites

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Proceedings Article | 7 March 2006 Paper

Shadow moire method for the measurement of the source position in three-dimensional shearography

Roger Groves, Stephen James, Ralph Tatam

Proceedings Volume 4101, (2006) https://doi.org/10.1117/12.498429

KEYWORDS: Moire patterns, Fringe analysis, Shearography, Cameras, Mirrors, Imaging systems, CCD cameras, Image segmentation, Reflection, Optical testing

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Proceedings Article | 7 March 2006 Paper

Surface strain characterization using time-division-multiplexed 3D shearography

Stephen James, Roger Groves, Ralph Tatam

Proceedings Volume 4101, (2006) https://doi.org/10.1117/12.498404

KEYWORDS: Shearography, CCD cameras, 3D metrology, Cameras, Semiconductor lasers, Optical fibers, Time division multiplexing, Speckle, Mirrors, Shearing interferometers

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Proceedings Article | 7 March 2006 Paper

Shape measurement by source displacement in three-dimensional shearography

Roger Groves, Stephen James, Ralph Tatam

Proceedings Volume 4101, (2006) https://doi.org/10.1117/12.498430

KEYWORDS: Mathematical modeling, Shearography, Interferometry, Speckle pattern, Cameras, Imaging systems, Distortion, Speckle, Mirrors, Optical spheres

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Proceedings Article | 29 August 2005 Paper

Optical coherence tomography with a Fizeau interferometer configuration

P. Casaubieilh, H. Ford, S. James, R. Tatam

Proceedings Volume 5858, 58580I (2005) https://doi.org/10.1117/12.612737

KEYWORDS: Signal to noise ratio, Interferometers, Refractive index, Optical coherence tomography, Sensors, Glasses, Light, Fizeau interferometers, Interfaces, Reflectivity

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Proceedings Article | 13 June 2005 Paper

Comparison of shearography and optical fibre Bragg grating strain sensors with resistance foil strain gauge measurements

Roger Groves, Edmon Chehura, Weilai Li, Stephen Staines, Stephen James, Ralph Tatam

Proceedings Volume 5856, (2005) https://doi.org/10.1117/12.611887

KEYWORDS: Fiber Bragg gratings, Shearography, Sensors, Optical fibers, Resistance, Refractive index, Optical testing, Demodulation, Speckle, Cameras

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Proceedings Article | 23 May 2005 Paper

Comparison of optical fibre Bragg grating strain sensors with shearography and resistance foil strain gauge measurements

Edmon Chehura, Roger Groves, Weilai Li, Stephen Staines, Stephen James, Ralph Tatam

Proceedings Volume 5855, (2005) https://doi.org/10.1117/12.624218

KEYWORDS: Fiber Bragg gratings, Sensors, Shearography, Optical fibers, Resistance, Demodulation, Interferometers, Mirrors, Cameras, Fiber optics sensors

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Proceedings Article | 23 May 2005 Paper

Rouard's method as a modelling tool for the sensing characteristics of complex fibre Fabry-Perot interferometers formed between chirped fibre Bragg gratings

Edmon Chehura, Stephen James, Ralph Tatam

Proceedings Volume 5855, (2005) https://doi.org/10.1117/12.623441

KEYWORDS: Fiber Bragg gratings, Reflectivity, Interfaces, Sensors, Fabry–Perot interferometry, Refractive index, Modeling, Fiber characterization, Phase shifts, Modulation

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Proceedings Article | 23 May 2005 Paper

Cascaded long period gratings with nano-structured coatings

Imran Ishaq, Stephen James, Geoffrey Ashwell, Ralph Tatam

Proceedings Volume 5855, (2005) https://doi.org/10.1117/12.624270

KEYWORDS: Signal attenuation, Cladding, Refractive index, Optical fibers, Sensors, Thin films, Optical coatings, Overlay metrology, Mach-Zehnder interferometers, Thin film deposition

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SPIE Journal Paper | 1 February 2005

Single-axis combined shearography and digital speckle photography instrument for full surface strain characterization

Roger Groves, Shan Fu, Stephen James, Ralph Tatam

OE, Vol. 44, Issue 02, 025602, (February 2005) https://doi.org/10.1117/12.10.1117/1.1842779

KEYWORDS: Shearography, Digital photography, Speckle, Digital signal processing, Photography, Speckle pattern, Image processing, Mirrors, Optical engineering, Error analysis

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Proceedings Article | 10 September 2004 Paper

Multidimensional strain and temperature measurements using a novel high-birefringent fiber Bragg grating interrogation system

Edmon Chehura, Alexandros Skordos, Chen-Chun Ye, Stephen James, Ivana Partridge, Ralph Tatam

Proceedings Volume 5457, (2004) https://doi.org/10.1117/12.545746

KEYWORDS: Fiber Bragg gratings, Sensors, Temperature metrology, Composites, Polarization, Birefringence, Glasses, Data acquisition, Epoxies, Refractive index

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Proceedings Article | 10 September 2004 Paper

Multicomponent laser shearography for the investigation of defects in rotating machinery

Roger Groves, Stephen James, Stuart Barnes, Shan Fu, Domenico Furfari, Philip Irving, Ralph Tatam

Proceedings Volume 5457, (2004) https://doi.org/10.1117/12.545125

KEYWORDS: Shearography, Optical fibers, Cameras, Head, Pulsed laser operation, Semiconductor lasers, Fourier transforms, Lenses, Optical imaging, Mirrors

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Proceedings Article | 9 June 2004 Paper

Fibre optic sensing using Langmuir-Blodgett thin film overlays

Stephen James, Imran Ishaq, Geoffrey Ashwell, Ralph Tatam

Proceedings Volume 5502, (2004) https://doi.org/10.1117/12.566788

KEYWORDS: Optical fibers, Refractive index, Sensors, Thin films, Waveguides, Polishing, Fiber optics, Overlay metrology, Thin film devices, Optical properties

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Proceedings Article | 10 November 2003 Paper

Multi-component pulsed-laser shearography using optical fiber imaging-bundles

Roger Groves, Stephen James, Ralph Tatam

Proceedings Volume 5191, (2003) https://doi.org/10.1117/12.503738

KEYWORDS: Shearography, Optical fibers, Cameras, Head, Interferometers, Pulsed laser operation, Optical imaging, Nd:YAG lasers, Speckle, Mirrors

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Proceedings Article | 30 May 2003 Paper

Multicomponent shearography using optical fiber imaging-bundles

Roger Groves, Stephen James, Ralph Tatam

Proceedings Volume 5144, (2003) https://doi.org/10.1117/12.499784

KEYWORDS: Shearography, Optical fibers, Cameras, Head, Interferometers, Lenses, Speckle pattern, Speckle, Laser sources, Optical imaging

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Proceedings Article | 27 May 2003 Paper

Multi component shearography employing four measurements channels

Roger Groves, Stephen James, Ralph Tatam

Proceedings Volume 4933, (2003) https://doi.org/10.1117/12.516623

KEYWORDS: Shearography, Speckle, Channel projecting optics, Speckle pattern, 3D metrology, Optical sensors, Photonics, Optical engineering, Interferometry, Interferometers

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Proceedings Article | 29 April 2003 Paper

Combined shearography and speckle pattern photography for single-access multi-component surface strain measurement

Roger Groves, Shan Fu, Stephen James, Ralph Tatam

Proceedings Volume 5058, (2003) https://doi.org/10.1117/12.509780

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Proceedings Article | 27 June 2002 Paper

Polarization-maintaining fiber Bragg grating interrogation system for multi-axis strain sensing

Chen-Chun Ye, Steven Staines, Stephen James, Ralph Tatam

Proceedings Volume 4694, (2002) https://doi.org/10.1117/12.472618

KEYWORDS: Fiber Bragg gratings, Phase modulation, Polarization, Sensors, Data acquisition, Signal detection, Sensing systems, Optical filters, Structured optical fibers, Fiber couplers

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Proceedings Article | 26 November 2001 Paper

Full surface strain measurement using shearography

Roger Groves, Stephen James, Ralph Tatam

Proceedings Volume 4448, (2001) https://doi.org/10.1117/12.449371

KEYWORDS: Shearography, Cameras, Speckle pattern, Mirrors, Head, Speckle, Semiconductor lasers, Interferometry, Interferometers, Image processing

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Proceedings Article | 23 October 2001 Paper

Strain measurement in curved industrial components using multicomponent shearography

Roger Groves, Stephen James, Ralph Tatam

Proceedings Volume 4398, (2001) https://doi.org/10.1117/12.445554

KEYWORDS: Shearography, Speckle pattern, Cameras, Interferometry, Mirrors, Head, Semiconductor lasers, CCD cameras, Imaging systems, Beam delivery

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Proceedings Article | 9 November 2000 Paper

Bend sensing using optical fibre long period gratings

Stephen James

Proceedings Volume 4185, 41850X (2000) https://doi.org/10.1117/12.2302176

KEYWORDS: Signal attenuation, Temperature metrology, Optical sensing, Optical fibers, Sensors, Charge-coupled devices, Structured optical fibers, Spectrometers, Ultraviolet radiation, Boron

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Proceedings Article | 31 August 2000 Paper

Long-period fiber gratings for simultaneous temperature and bend sensing

Chen-Chun Ye, Stephen James, Ralph Tatam

Proceedings Volume 4074, (2000) https://doi.org/10.1117/12.397896

KEYWORDS: Signal attenuation, Temperature metrology, Sensors, Boron, Ultraviolet radiation, Charge-coupled devices, Fiber optics sensors, Cladding, Smart structures, Spectrometers

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Proceedings Article | 24 August 2000 Paper

Bend sensing in structures using long-period optical fiber gratings

Chen-Chun Ye, Cathy Wei, S. Khaliq, Stephen James, P. Irving, Ralph Tatam

Proceedings Volume 4073, (2000) https://doi.org/10.1117/12.396412

KEYWORDS: Signal attenuation, Cladding, Adhesives, Sensors, Fiber Bragg gratings, Optical fibers, Structural sensing, Refractive index, Ultraviolet radiation, Structured optical fibers

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Proceedings Article | 15 December 1999 Paper

Optical low-coherence tomography of bronchial tissue

Karl Bamford, Stephen James, Hugh Barr, Ralph Tatam

Proceedings Volume 3858, (1999) https://doi.org/10.1117/12.372915

KEYWORDS: Tissue optics, Interferometers, Tissues, Coherence (optics), Michelson interferometers, Cancer, Mirrors, Sensors, Optical fibers, Fizeau interferometers

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Proceedings Article | 13 October 1999 Paper

3D shearography for surface strain analysis

Stephen James, Ralph Tatam

Proceedings Volume 3783, (1999) https://doi.org/10.1117/12.365743

KEYWORDS: Shearography, Semiconductor lasers, CCD cameras, Shearing interferometers, Cameras, Time division multiplexing, 3D metrology, Interferometers, Strain analysis, Wavelength tuning

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Proceedings Article | 1 September 1999 Paper

An investigation of the tensile strength of fibre Bragg gratings

Stephen James

Proceedings Volume 3746, 374631 (1999) https://doi.org/10.1117/12.2302099

KEYWORDS: Fiber Bragg gratings, Ultraviolet radiation, Optical fibers, Coating, Failure analysis, Sensors, Silica, Continuous wave operation, Polymers, Photonics

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Proceedings Article | 17 August 1999 Paper

Polarization-multiplexed and phase-stepped fiber optic shearography using laser wavelength modulation

Roger Groves, Stephen James, Ralph Tatam

Proceedings Volume 3745, (1999) https://doi.org/10.1117/12.357773

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Proceedings Article | 13 August 1999 Paper

Time-division-multiplexed 3D shearography

Stephen James, Ralph Tatam

Proceedings Volume 3744, (1999) https://doi.org/10.1117/12.357738

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Proceedings Article | 31 May 1999 Paper

Influence of process route on mechanical and sensing performance of fiber Bragg grating optical sensors

Cathy Wei, Stephen James, Chen-Chun Ye, Ralph Tatam, P. Irving

Proceedings Volume 3670, (1999) https://doi.org/10.1117/12.349727

KEYWORDS: Fiber Bragg gratings, Coating, Optical fibers, Ultraviolet radiation, Sensors, Failure analysis, Glasses, Silica, Optical sensors, Fiber coatings

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Proceedings Article | 6 July 1998 Paper

Impact detection in carbon fiber reinforced polymer composites using in-fiber Bragg gratings

Martin O'Dwyer, N. Dykes, Stephen James, Ralph Tatam, P. Irving

Proceedings Volume 3479, (1998) https://doi.org/10.1117/12.316449

KEYWORDS: Sensors, Composites, Carbon, Fiber Bragg gratings, Transducers, Optical fibers, Demodulation, Interferometers, Interference filters, Modulation

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Proceedings Article | 6 July 1998 Paper

Transient strain monitoring on a gun barrel using optical fiber Bragg grating sensors

Stephen James, Steven Fuller, Colin Crompton, Ralph Tatam

Proceedings Volume 3479, (1998) https://doi.org/10.1117/12.316451

KEYWORDS: Fiber Bragg gratings, Sensors, Demodulation, Optical fibers, Optical filters, Avalanche photodiodes, Adaptive optics, Temperature metrology, Avalanche photodetectors, Interference filters

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Proceedings Article | 6 July 1998 Paper

In-situ internal strain development and cure monitoring in a curing composite using in-fiber Bragg gratings and dielectric sensors

Martin O'Dwyer, G. Maistros, Stephen James, Ralph Tatam, I. Partridge

Proceedings Volume 3479, (1998) https://doi.org/10.1117/12.316469

KEYWORDS: Composites, Sensors, Dielectrics, Carbon, Fiber Bragg gratings, Ions, Optical sensors, Optical fibers, Temperature metrology, Epoxies

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Proceedings Article | 30 June 1998 Paper

Pseudoheterodyne signal processing scheme for interrogation of fiber Bragg grating sensor arrays

Clare Chatterjea, Stephen James, Ralph Tatam

Proceedings Volume 3478, (1998) https://doi.org/10.1117/12.312945

KEYWORDS: Fiber Bragg gratings, Sensors, Interferometers, Reflectivity, Mirrors, Modulation, Oscilloscopes, Signal processing, Multiplexing, Phase shift keying

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Proceedings Article | 21 November 1997 Paper

On-axis laser doppler velocimetry for turbomachinery applications using optical fiber techniques

David Egan, Stephen James, Ralph Tatam

Proceedings Volume 3172, (1997) https://doi.org/10.1117/12.293392

KEYWORDS: Velocity measurements, Doppler effect, Absorption, Laser Doppler velocimetry, Light scattering, Optical fibers, 3D metrology, Iodine, Solids, Spatial resolution

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Proceedings Article | 1 October 1997 Paper

Fiber optic pH sensors using thin-film Langmuir-Blodgett overlay waveguides on single-mode optical fibers

Damian Flannery, Stephen James, Ralph Tatam, Geoffrey Ashwell

Proceedings Volume 3133, (1997) https://doi.org/10.1117/12.279109

KEYWORDS: Sensors, Absorption, Refractive index, Waveguides, Optical fibers, Dispersion, Thin films, Polishing, Overlay metrology, Fiber optics sensors

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Proceedings Article | 30 May 1997 Paper

Chemical sensing using Langmuir-Blodgett waveguide overlays on single-mode optical fibers

Damian Flannery, Stephen James, Ralph Tatam, Geoffrey Ashwell, David Allen, Xing Li

Proceedings Volume 3105, (1997) https://doi.org/10.1117/12.276146

KEYWORDS: Sensors, Absorption, Refractive index, Waveguides, Polishing, Biological and chemical sensing, Fiber optics, Dispersion, Single mode fibers, Optical fibers

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Proceedings Article | 27 November 1996 Paper

Demodulation of in-fiber Bragg grating sensors using volume holograms

Stephen James, Michael Dockney, Ralph Tatam

Proceedings Volume 2838, (1996) https://doi.org/10.1117/12.259815

KEYWORDS: Holograms, Fiber Bragg gratings, Sensors, Volume holography, Optical filters, Demodulation, Holography, Diffraction, Multiplexing, Filtering (signal processing)

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Proceedings Article | 25 October 1996 Paper

3D fiber optic Laser Doppler Velocimetry

Stephen James, Robert Lockey, David Egan, Ralph Tatam, Robin Elder

Proceedings Volume 2839, (1996) https://doi.org/10.1117/12.255367

KEYWORDS: Laser Doppler velocimetry, Doppler effect, Velocity measurements, 3D metrology, Semiconductor lasers, Light scattering, Optical fibers, Fiber optics, Head, Polarization

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Proceedings Article | 29 September 1995 Paper

Reference beam laser Doppler velocimeter incorporating fiber optic components

Stephen James, Robert Lockey, David Egan, Ralph Tatam

Proceedings Volume 2546, (1995) https://doi.org/10.1117/12.221547

KEYWORDS: Doppler effect, Velocity measurements, Semiconductor lasers, Light scattering, Beam splitters, Bragg cells, Laser Doppler velocimetry, Optical fibers, Sensors, Continuous wave operation

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