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  • Zhernovaya, Olga (University of Limerick, 2015)
    Light scattering in biological tissues and blood leads to a reduction in imaging spatial resolution, imaging depth and contrast of optical imaging techniques. Refractive index mismatch between erythrocytes and blood plasma ...
  • Chiavaroli, Stefano; Newport, David; Woulfe, Bernie (American Institute of Physics, 2010)
    A barrier in scaling laboratory processes into automated microfluidic devices has been the transfer of lab based assays: where engineering meets biological protocol. One basic requirement is to reliably and accurately ...
  • Woulfe, Peter; Sullivan, F.J.; Kam, Wern; O'Keeffe, Sinéad (Optical Society of America, 2020)
    An optical fiber sensor for monitoring low dose radiation is presented. The sensor, based on radiation sensitive scintillation material, terbium doped gadolinium oxysulphide (Gd2O2S:Tb), is embedded in a cavity of 700μm ...
  • Yan, Yongji; Zhang, Xu; Li, Haopeng; Ma, Yu; Xie, Tianci; Qin, Zhuang; Liu, Shuangqiang; Sun, Weimin; Lewis, Elfed (MDPI, 2018)
    A novel ultraviolet (UV) optical fiber sensor (UVOFS) based on the scintillating material La2O2S:Eu has been designed, tested, and its performance compared with other scintillating materials and other conventional UV ...
  • Fitzpatrick, Colin; Lewis, Elfed; Al-Shamma'a, AI; Lucas, J. (International Society for Optics and Photonics, 2001)
    Low-pressure mercury lamps are commonly used for germicidal applications such as water and wastewater sterilisation. The germicidal effect is due to the emission of light at 254nm, which leads to the destruction of most ...
  • Macchi, Edoardo Gino; Tosi, Daniele; Braschi, Giovanni; Gallati, Mario; Cigada, Alfredo; Busca, Giorgio; Lewis, Elfed (SPIE: The International Society for Optics and Photonics, 2014)
    Radiofrequency thermal ablation (RFTA) induces a high-temperature field in a biological tissue having steep spatial (up to 6 degrees C/mm) and temporal (up to 1 degrees C/s) gradients. Applied in cancer care, RFTA produces ...
  • Sporea, Dan; Sporea, Adelina; O'Keeffe, Sinéad; McCarthy, Denis; Lewis, Elfed (INTECH, 2012)
    By their very nature, optical fibers and, by extension, intrinsic and extrinsic optical fiberbased sensors are promising devices to be used in very different and complex environments considering their characteristics ...
  • Duraibabu, Dinesh Babu; Poeggel, Sven; Omerdić, Edin; Capocci, Romano; Lewis, Elfed; Newe, Thomas; Leen, Gabriel; Toal, Daniel; Dooly, Gerard (MDPI, 2017)
    A miniature sensor for accurate measurement of pressure (depth) with temperature compensation in the ocean environment is described. The sensor is based on an optical fibre Extrinsic Fabry-Perot interferometer (EFPI) ...
  • Newe, Thomas; O'Connell, Eoin; Meere, Damien; Yuan, Hongwei; Leen, Gabriel; O'Keeffe, Sinéad; Lewis, Elfed (Society of Photo-optical Instrumentation Engineers (SPIE), 2016)
    Recent advancements in cloud computing technologies in the context of optical and optical fibre based systems are reported. The proliferation of real time and multi-channel based sensor systems represents significant growth ...
  • Poeggel, Sven; Tosi, Daniele; Duraibabu, Dinesh Babu; Leen, Gabriel; McGrath, Deirdre; Lewis, Elfed (MDPI, 2015)
    This article is focused on reviewing the current state-of-the-art of optical fibre pressure sensors for medical applications. Optical fibres have inherent advantages due to their small size, immunity to electromagnetic ...
  • Fabian, Matthias (University of Limerick, 2013)
    This work describes the development of a fibre-optic fluid concentration sensor that is based on evanescent field absorption. In addition, a second optical sensor principle is investigated by means of the development of ...
  • Zawawi, Mohd Anwar (University of Limerick, 2015)
    Health monitoring applications in clinical environment include various areas such as respiration assessment, heart rate monitoring, gait monitoring, spine bending as well as lower and upper limb motion detections. In human ...
  • Clifford, John (University of Limerick, 2011)
    This work describes the investigation and development of an optical fibre gas sensor based on mid infra red absorption spectroscopy. The sensor is suitable for monitoring the gases present in the exhaust emissions of a ...
  • O'Keeffe, Sinéad; Dooly, Gerard; Fitzpatrick, Colin; Lewis, Elfed (IOP Publishing, 2005)
    The use of optical fibres for the measurement of ozone based on the optical absorption of both UV light at 254nm and visible light at 600nm is investigated and tested. Calculations based on the Beer-Lambert Law are also ...
  • O'Keeffe, Sinéad; Fitzpatrick, Colin; Fernandez, Fernandez AI; Lewis, Elfed; Al-Shamma'a, AI (IOP Publishing, 2007)
    The radiation-induced attenuation in poly-methylmethacrylate (PMMA) based plastic optical fibres is monitored online during exposure to gamma radiation, in an investigation in to their use as an intrinsic real-time gamma ...
  • Woulfe, Peter; Sullivan, F.J.; O'Keeffe, Sinéad (Springer Open, 2016)
    Review is made of dosimetric studies of current optical fibre technology in radiotherapy for therapeutic applications, focusing particularly on in vivo dosimetry for prostate radiotherapy. We present the various sensor ...
  • McCarthy, Denis (University of Limerick, 2015)
    In this thesis, the development of a novel fibre optic sensor for measuring X-ray radiation in radiotherapy is investigated. The proposed sensor is based on utilising PMMA optical fibres which are coated with an X-ray ...
  • O'Keeffe, Sinéad; Zhao, W.; Sun, W.; Zhang, Daxin; Qin, Z.; Chen, Z.; Ma, Y.; Lewis, Elfed (IEEE Computer Society, 2016)
    A novel real-time optical fibre X-Ray dosimeter for monitoring the radiation pulses delivered from a clinical linear accelerator (Linac) is presented. The primary focus of the sensor is to measure low doses of ionising ...
  • Yi, Yating; Yu, Jibo; Jiang, Yuxuan; Lewis, Elfed; Brambilla, Gilberto; Wang, Pengfei (Optical Society of America, 2019)
    A novel design of nested optical fiber based multiple knot resonators is presented. The design consists of three knot resonators, two of which share a significant fraction of their optical path. The relationship between ...
  • Sai, Ashish Rajendra; Buckley, Jim; Le Gear, Andrew (2018)
    Proof Of Work Blockchains such as Bitcoin and Ethereum exhibit a low Transaction Per Second (TPS) that impacts the scalability of the blockchain. Manipulating the block creation time can yield a higher TPS. A lower block ...