Browsing by Author "James, Stephen W."

Browsing by Author "James, Stephen W."

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  • Fabrication and optimisation of a fused filament 3D-printed microfluidic platform 
    Tothill, Alexander M.; Partridge, Matthew; James, Stephen W.; Tatam, Ralph P. (IOP Publishing: Hybrid Open Access, 2017-02-15)
    A 3D-printed microfluidic device was designed and manufactured using a low cost ($2000) consumer grade fusion deposition modelling (FDM) 3D printer. FDM printers are not typically used, or are capable, of producing the ...
  • Fabrication of fiber optic long period gratings operating at the phase matching turning point using an ultraviolet laser 
    Wong, Rebecca Y. N; Chehura, Edmon; Staines, Stephen E.; James, Stephen W.; Tatam, Ralph P. (Optical Society of America, 2014-06-12)
    It is known that optical fiber long period gratings (LPGs) exhibit their highest sensitivity to environmental perturbation when the period is such that the phase matching condition is satisfied at its turning point. The ...
  • The fabrication of micro-tapered optical fibres for sensing applications 
    Mullaney, Kevin (Cranfield University, 2016-11)
    This thesis describes the processes used to manufacture optical fibre tapers and tapered long period gratings (TLPGs) using a CO2 laser. A semi-automated system for fabricating adiabatic and non-adiabatic tapers with ...
  • Fiber optic long period grating sensors with a nanoassembled mesoporous film of SiO2 nanoparticles 
    Korposh, Sergiy; James, Stephen W.; Lee, Seung-Woo; Topliss, Stephen M.; Cheung, Sammy C.; Batty, William J.; Tatam, Ralph P. (Optical Society of America (OSA), 2010-06-07)
    A novel approach to chemical application of long period grating (LPG) optical fibers was demonstrated, which were modified with a film nanoassembled by the alternate deposition of SiO2 nanoparticles (SiO2 NPs) and ...
  • Fiber-optic chemical sensing with Langmuir-Blodgett overlay waveguides 
    Flannery, D.; James, Stephen W.; Tatam, Ralph P.; Ashwell, Geoffrey J. (Osa Optical Society of America, 1999-12-20)
    Fiber-optic chemical sensing has been demonstrated with a side-polished single- mode optical fiber, evanescently coupled to chemically sensitive Langmuir- Blodgett (LB) overlay waveguides. The sensors exhibit a ...
  • Fibre Bragg grating based effective soil pressure sensor for geotechnical applications 
    Correia, Ricardo N.; Li, Jin; Staines, Stephen E.; Chehura, Edmon; James, Stephen W.; Tatam, Ralph P.; Kutner, Joel; Dewhurst, Paul; Ferreira, Pedro (International Society for Optical Engineering; 1999, 2009-12-31)
    An effective-soil-pressure sensor for geotechnical applications based on Fibre Bragg Gratings is presented. The sensor simultaneous measures total soil pressure and pore pressure, allowing the calculation of the effective ...
  • A fibre Bragg grating based inclinometer system for ground movement measurement 
    Li, Jin; Correia, Ricardo N.; Chehura, Edmon; Staines, Stephen E.; James, Stephen W.; Tatam, Ralph P. (International Society for Optical Engineering; 1999, 2010-12-31)
    The measurement of ground movement is an essential part of many geotechnical engineering operations. For decades, inclinometer systems have traditionally been used for this purpose to provide crucial information to ...
  • Fibre Bragg grating sensors for the analysis of pressure distribution at a disc brake/pad interface 
    Major, B. T.; Tiwari, Divya; Correia, Ricardo; James, Stephen W.; Tirovic, Marko; Tatam, James P. (SPIE, 2017-04-24)
    The use of optical fibre Bragg gratings (FBGs) to monitor the Interface Pressure Distribution (IPD) on an automotive disc brake pad under a variety of loading conditions is studied. The results demonstrate successful strain ...
  • Fibre grating refractometer sensors for composite process monitoring 
    Buggy, Stephen J.; Chehura, Edmon; Skordos, Alexandros A.; Dimopoulos, A.; James, Stephen W.; Partridge, Ivana K.; Tatam, Ralph P. (2007-06-17)
    Optimum performance from advanced composites requires careful control of the resin matrix during cure. This is to ensure there are no cure induced voids and to minimise the build up of internal stresses. Careful control ...
  • A fibre optic angle sensing tape for applications in robotics and automation 
    Pillai, Sivaji; Charrett, Thomas O. H.; Kissinger, Thomas; James, Stephen W.; Tatam, Ralph P. (SPIE, 2023-08-15)
    A dual-fibre single-plane angle-sensing tape that utilizes optical Fibre Segment Interferometry and Range- Resolved Interferometry (RRI) for angle sensing is presented. The sensing tape facilitates the multiplexing of an ...
  • Fibre optic sensors with biologically active coatings for the detection of cells. 
    Rendon Romero, Antonio (Cranfield UniversitySATM, 2019-05)
    The purpose of this thesis is to develop a rapid, sensitive and selective optical sensor for Campylobacter jejuni detection as it is the most common cause of foodborne illness in humans. The optical sensor platform was ...
  • Fibre Optic Sensors with Nano-Structured Coatings. 
    James, Stephen W.; Tatam, Ralph P. (Institute of Physics, 2006-07-01)
    A review of optical fibre devices employing nano-structured coatings is presented. Active and passive coatings, deposited using the Langmuirâ  Blodgett and electro-static self-assembly techniques, have been utilised ...
  • Fibre segment interferometry for dynamic strain measurements 
    Kissinger, Thomas; Correia, Ricardo N.; Charrett, Thomas O. H.; James, Stephen W.; Tatam, Ralph P. (Institute of Electrical and Electronics Engineers, 2016-02-18)
    Using a novel range-resolved interferometric signal processing technique based on the sinusoidal optical frequency modulation of a cost-effective laser diode, a fibre sensing approach termed fibre segment interferometry ...
  • Fibre-optic long period gratings for sensing applications 
    Khaliq, Sarfraz (Cranfield University, 2003-03)
    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 ...
  • Fibre-optic long period gratings with nano-structured overlays 
    Ishaq, I. M. (Cranfield University, 2006)
    The influence of nano-structured overlays on the properties of fibre optic Long Period Gratings (LPGs) has been investigated. The presence of overlays of thickness of order 100 m is shown to significantly alter the ...
  • Fibre-optic measurement of strain and shape on a helicopter rotor blade during a ground run: 1. Measurement of strain 
    James, Stephen W.; Kissinger, Thomas; Weber, Simone; Mullaney, Kevin; Chehura, Edmond (IOP Publishing, 2022-06-08)
    Optical fibre strain and shape measurement sensors were deployed on a 5-m long rotor blade during a full-speed (rotation rate 6.6 Hz) helicopter ground run, with real-time data wirelessly streamed from rotor hub-mounted ...
  • Fibre-optic measurement of strain and shape on a helicopter rotor blade during a ground run: 2. Measurement of shape 
    Kissinger, Thomas; James, Stephen W.; Weber, Simone; Mullaney, Kevin; Chehura, Edmond; Pekmezci, Huseyin H.; Barrington, James; Staines, Stephen E.; Charrett, Thomas O. H.; Lawson, Nicholas J.; Lone, Mudassir; Atack, Richard; Tatam, Ralph P. (IOP Publishing, 2022-06-08)
    Optical fibre strain and shape measurement sensors were deployed on a rotor blade during a full-speed helicopter ground run, with real-time data wirelessly streamed from rotor hub-mounted sensor interrogators. In part 2 ...
  • Fibre-optic sensors with molecular coatings 
    Partridge, Matthew (Cranfield University, 2012-12)
    The intrinsic stability of fibre optic based sensing systems offer a platform that is suited to hazardous waste detection in a wide range of environments. Over the last few years Cranfield University has been working on ...
  • Frequency division multiplexing for interferometric planar Doppler velocimetry 
    Charrett, Thomas O. H.; Bledowski, Ian A.; James, Stephen W.; Tatam, Ralph P. (Optical Society of America, 2014-05-30)
    A new method of acquiring simultaneously the signal and reference channels used for interferometric planar Doppler velocimetry is proposed and demonstrated. The technique uses frequency division multiplexing (FDM) to ...
  • Frequency-division multiplexing for multicomponent shearography 
    Bledowski, Ian A.; Charrett, Thomas O. H.; Francis, Daniel; James, Stephen W.; Tatam, Ralph P. (Osa Optical Society of America, 2013-01-20)
    A new method of multiplexing the speckle patterns needed in multicomponent digital shearography systems is presented. Frequency-division multiplexing (FDM) of the measurement channels is achieved by recording speckle ...