Browsing by Author "Correia, Ricardo"

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    Fiber segment interferometry for dynamic strain measurements
    (Cranfield University, 2017-07-21 15:25) Kissinger, Thomas; Charrett, Thomas O. H. ; James, Stephen W. ; Tatam, Ralph P. ; Correia, Ricardo
    Research Data for Paper: Thomas Kissinger, Ricardo Correia, Thomas O. H. Charrett, Stephen W. James and Ralph P. Tatam, "Fiber segment interferometry for dynamic strain measurements" Journal of Lightwave Technology 34.19 (2016): 4620-4626
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    Fibre Bragg grating sensors for the analysis of pressure distribution at a disc brake/pad interface
    (SPIE, 2017-04-24) Major, B. T.; Tiwari, Divya; Correia, Ricardo; James, Stephen W.; Tirovic, Marko; Tatam, James P.
    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 transfer from the brake pads to the attached FBG sensors under static loading, with a linear response to increasing pressure, and with the measured IPD showing good agreement with that recorded using pressure sensitive paper. Results are also presented demonstrating that changes in the IPD as a result of torque acting on the brake pads can be monitored by the FBG sensors.
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    Monitoring the fabrication of tapered optical fibres
    (SPIE, 2017-04-23) Mullaney, Kevin; Correia, Ricardo; Staines, Stephen; James, Stephen W.; Tatam, Ralph P.
    A variety of optical methods to enhance the process of making optical fibre tapers are explored. A thermal camera was used to both refine the alignment of the optical components and optimize the laser power profile during the tapering process. The fibre transmission was measured to verify that the tapers had the requisite optical characteristics while the strain experienced by the fibre while tapering was assessed using an optical fibre Bragg grating. Using these techniques, adiabatic tapers were fabricated with a 2% insertion loss.