Browsing by Author "Mullaney, Kevin"

Browsing by Author "Mullaney, Kevin"

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  • Ammonia sensing using lossy mode resonances in a tapered optical fibre coated with porphyrin-incorporated titanium dioxide 
    Tiwari, Divya; Mullaney, Kevin; Korposh, Sergiy; James, Stephen W.; Lee, Seung-Woo; Tatam, Ralph P. (Society of Photo-optical Instrumentation Engineers (SPIE), 2016-05-30)
    The development of an ammonia sensor, formed by the deposition of a functionalised titanium dioxide film onto a tapered optical fibre is presented. The titanium dioxide coating allows the coupling of light from the fundamental ...
  • An ammonia sensor based on Lossy Mode Resonances on a tapered optical fibre coated with porphyrin-incorporated titanium dioxide 
    Tiwari, Divya; Mullaney, Kevin; Korposh, Sergiy; James, Stephen W.; Lee, Seung-Woo; Tatam, Ralph P. (Elsevier, 2017-04)
    The development of a highly sensitive ammonia sensor is described. The sensor is formed by deposition of a nanoscale coating of titanium dioxide, containing a porphyrin as a functional material, onto a tapered optical ...
  • Application of fibre optic sensing systems to measure rotor blade structural dynamics 
    Weber, Simone; Kissinger, Thomas; Chehura, Edmond; Staines, Stephen; Barrington, James; Mullaney, Kevin; Fragonara, Luca Zanotti; Petrunin, Ivan; James, Stephen; Lone, Mudassir; Tatam, Ralph P. (Elsevier, 2021-03-09)
    This paper compares two fibre optic sensing techniques for vibration characterisation: (a) optical fibre Bragg grating (FBG) strain gauges and (b) a novel direct fibre optic shape sensing (DFOSS) approach based on differential ...
  • Bladesense – a novel approach for measuring dynamic helicopter rotor blade deformation 
    Weber, Simone; Southgate, Dominic; Mullaney, Kevin; James, Stephen; Rutherford, Robert; Sharma, Anuj; Lone, Mudassir; Kissinger, Thomas; Chehura, Edmond; Staines, Stephen; Pekmezci, Huseyin; Fragonara, Luca Zanotti; Petrunin, Ivan; Williams, Dan; Moulitsas, Irene; Cooke, Alastair; Rosales, Waldo; Tatam, Ralph P.; Morrish, Peter; Fairhurst, Mark; Atack, Richard; Bailey, Gordon; Morley, Stuart (European Rotorcraft Forum, 2018-12-31)
    Technologies that allow accurate measurement of rotorblade dynamics can impact almost all areas of the rotorcraft sector; ranging from maintenance all the way to blade design. The BladeSense project initiated in 2016 aims ...
  • 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 ...
  • 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 ...
  • Monitoring techniques for the manufacture of tapered optical fibers 
    Mullaney, Kevin; Goncalves Correia, Ricardo; Staines, Stephen E.; James, Stephen W.; Tatam, Ralph P. (OSA Publishing, 2015-10-01)
    The use of a range of optical techniques to monitor the process of fabricating optical fiber tapers is investigated. Thermal imaging was used to optimize the alignment of the optical system; the transmission spectrum of ...
  • Monitoring the fabrication of tapered optical fibres 
    Mullaney, Kevin; Correia, Ricardo; Staines, Stephen; James, Stephen W.; Tatam, Ralph P. (SPIE, 2017-04-23)
    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 ...
  • Novel highly sensitive protein sensors based on tapered optical fibres modified with Au-based nanocoatings 
    Urrutia, Aitor; Bojan, Kartheka; Marques, L.; Mullaney, Kevin; Goicoechea, Javier; James, Stephen W.; Clark, M.; Tatam, Ralph P.; Korposh, Sergiy (Hindawi Publishing Corporation, 2016-08-08)
    In this work, novel protein sensors based on tapered optical fibres modified with Au coatings deposited using two different procedures are proposed. Au based coatings are deposited onto a non-adiabatic tapered optical fibre ...
  • Optimised process for fabricating tapered long period gratings 
    Mullaney, Kevin; Staines, Stephen; James, Stephen; Tatam, Ralph P. (SPIE, 2017-04-23)
    The process of fabricating tapered long period gratings (TLPGs) using a CO2 laser is described. TLPGs with a period spacing of 378 μm, were fabricated by optimization of the taper waist diameter and careful control of the ...
  • Optimized process for fabricating ultra-short tapered long period gratings 
    Mullaney, Kevin; Staines, Stephen; James, Stephen; Ralph, Tatam (IEEE, 2017-11-03)
    The process of fabricating tapered long period gratings (TLPGs) using a CO2 laser is described. The objective of this work is to optimize the CO2 laser based fabrication of TLPGs so that their transmission spectra are ...
  • Wavelength-locking of a semiconductor laser using an electronic technique 
    Mullaney, Kevin; Hodgkinson, Jane; Staines, Stephen; Tatam, Ralph P. (SPIE, 2019-03-04)
    This work describes a novel system to control the stability of a 1583 nm telecommunications laser diode via measurement of junction voltage. This electronic technique dispenses with the optical components used in ...