Prof. Gerald Farrell Profile

Prof. Gerald Farrell

Director of the Photonics Research Ctr. at Technological Univ Dublin

SPIE Involvement:

Author

Publications (82)

Proceedings Article | 28 August 2019 Paper

Fused silica capillary interferometer with a layer-by-layer functional coating for the analysis of chemicals content in aqueous solutions

Arun Kumar Mallik, Gerald Farrell, Qiang Wu, Yuliya Semenova

Proceedings Volume 11199, 111991I (2019) https://doi.org/10.1117/12.2541147

KEYWORDS: Silica, Chemical analysis, Capillaries, Sensors, Bioalcohols, Coating, Principal component analysis, Chemical compounds, Interferometers, Single mode fibers

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SPIE Journal Paper | 8 June 2019

Multiwavelength Q-switched pulse operation with gold nanoparticles as saturable absorber

Shi Li, Yu Yin, Elfed Lewis, Gerald Farrell, Masaki Tokurukawa, Ahmad Haziq Aiman Rosol, Sulaiman Harun, Pengfei Wang

OE, Vol. 58, Issue 06, 066104, (June 2019) https://doi.org/10.1117/12.10.1117/1.OE.58.6.066104

KEYWORDS: Pulsed laser operation, Q switching, Nanoparticles, Fiber lasers, Gold, Q switched lasers, Oscilloscopes, Surgery, Saturable absorption, Laser damage threshold

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Proceedings Article | 4 March 2019 Paper

Sensing of multiple parameters with whispering gallery mode optical fiber micro-resonators

Arun Kumar Mallik, Vishnu Kavungal, Gerald Farrell, Yuliya Semenova

Proceedings Volume 10904, 109041W (2019) https://doi.org/10.1117/12.2513412

KEYWORDS: Sensors, Microresonators, Humidity, Temperature metrology, Optical fibers, Silica, Resonators, Sensing systems

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Proceedings Article | 23 April 2017 Paper

Compact relative humidity sensor based on an Agarose hydrogel coated silica microsphere resonator

Arun Kumar Mallik, Dejun Liu, Vishnu Kavungal, Xiaokang Lian, Gerald Farrell, Qiang Wu, Yuliya Semenova

Proceedings Volume 10323, 103230C (2017) https://doi.org/10.1117/12.2263529

KEYWORDS: Sensors, Humidity, Fiber optics sensors, Silica, Resonators, Microresonators, Coating, Numerical simulations, Spherical lenses, Optical spheres

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Proceedings Article | 23 April 2017 Paper

Detection of volatile organic compounds using an optical fiber sensor coated with a sol-gel silica layer containing immobilized Nile red

Dejun Liu, Xiaokang Lian, Arun Kumar Mallik, Wei Han, Fangfang Wei, Jinhui Yuan, Chongxiu Yu, Gerald Farrell, Yuliya Semenova, Qiang Wu

Proceedings Volume 10323, 103232W (2017) https://doi.org/10.1117/12.2263671

KEYWORDS: Gas sensors, Metals, Oxides, Sensors, Coating, Sol-gels, Silica, Structured optical fibers, Fiber optics sensors, Bioalcohols

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Proceedings Article | 23 April 2017 Paper

Simultaneous measurement of both magnetic field strength and temperature with a microfiber coupler based fiber laser sensor

Fangfang Wei, Arun Kumar Mallik, Dejun Liu, Wei Han, Xiaokang Lian, Gerald Farrell, Qiang Wu, Gang-Ding Peng, Yuliya Semenova

Proceedings Volume 10323, 103230H (2017) https://doi.org/10.1117/12.2263678

KEYWORDS: Sensors, Magnetism, Magnetic sensors, Fiber lasers, Fiber Bragg gratings, Temperature metrology, Microsoft Foundation Class Library, Microfluidics, Fiber optics sensors, Wavelength division multiplexing

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Proceedings Article | 23 April 2017 Paper

High sensitivity temperature sensor based on a polymer filled hollow core optical fibre interferometer

Rahul Kumar, Wai Pang Ng, Yong-Qing Fu, Jinhui Yuan, Chongxiu Yu, Gerald Farrell, Yuliya Semenova, Qiang Wu

Proceedings Volume 10323, 103233H (2017) https://doi.org/10.1117/12.2265041

KEYWORDS: Refractive index, Structured optical fibers, Sensors, Temperature sensors, Polymeric sensors, Polymers, Fiber optics sensors, Optical fibers, Interferometers, Thermal optics

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Proceedings Article | 14 November 2016 Paper

A spherical-structure based fiber sensor for simultaneous measurement of ammonia gas concentration and temperature

Wei Han, Dejun Liu, Xiaokang Lian, Arun Kumar Mallik, Fangfang Wei, Lei Sun, Gerald Farrell, Yuliya Semenova, Qiang Wu

Proceedings Volume 10025, 100251J (2016) https://doi.org/10.1117/12.2247652

KEYWORDS: Fiber optics sensors, Fusion splicing, Temperature metrology, Single mode fibers, Multimode fibers, Cladding, Sensors, Coating, Silica, Refractive index

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Proceedings Article | 11 November 2016 Paper

An SMS structure based temperature sensor using a chalcogenide multimode fibre

Pengfei Wang, Libo Yuan, Gilberto Brambilla, Gerald Farrell

Proceedings Volume 10150, 1015015 (2016) https://doi.org/10.1117/12.2246833

KEYWORDS: Structured optical fibers, Chalcogenides, Temperature sensors, Multimode fibers, Silica, Single mode fibers, Fusion splicing, Temperature metrology, Refractive index, Chalcogenide glass

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Proceedings Article | 30 May 2016 Paper

Porous silica coated spherical microresonator for vapor phase sensing of ammonia at a sub-ppm level

Arun Mallik, Gerald Farrell, Dejun Liu, Vishnu Kavungal, Qiang Wu, Yuliya Semenova

Proceedings Volume 9916, 99161Y (2016) https://doi.org/10.1117/12.2236486

KEYWORDS: Silica, Sensors, Microresonators, Fiber optics sensors, Spherical lenses, Optical resonators, Environmental sensing, Refractive index, Polymers, Resonators, Gas sensors

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Proceedings Article | 30 May 2016 Paper

Utilising a loop structure to allow a microfiber coupler with larger taper diameters to be used for sensing

Fangfang Wei, Gerald Farrell, Qiang Wu, Yuliya Semenova

Proceedings Volume 9916, 991608 (2016) https://doi.org/10.1117/12.2236636

KEYWORDS: Microsoft Foundation Class Library, Sensors, Fiber couplers, Interferometers, Temperature sensors, Refractive index, Structured optical fibers, Temperature metrology, Environmental sensing, Mirrors, Polarization, Sagnac interferometers, Head

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Proceedings Article | 22 April 2016 Paper

Development of packaged silica microspheres coupled with tapered optical microfibres

Pengfei Wang, Ramgopal Madugani, Haoyu Zhao, Jonathan Ward, Yong Yang, Gerald Farrell, Gilberto Brambilla, Síle Nic Chormaic

Proceedings Volume 9727, 972704 (2016) https://doi.org/10.1117/12.2211757

KEYWORDS: Silica, Resonators, Packaging, Optical fibers, Microresonators, Epoxies, Optical filters, Ultraviolet radiation, Polymers, Integrated optics, Fabrication

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Proceedings Article | 28 September 2015 Paper

Long period grating inscribed in multimode fibre interferometer and its application in refractive index sensing

Pengfei Wang, Haoyu Zhao, Gilberto Brambilla, Gerald Farrell, Libo Yuan

Proceedings Volume 9634, 96346A (2015) https://doi.org/10.1117/12.2191126

KEYWORDS: Refractive index, Sensors, Multimode fibers, Femtosecond phenomena, Structured optical fibers, Fiber optics sensors, Cladding, Single mode fibers, Interferometers, Optical fibers

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Proceedings Article | 28 September 2015 Paper

Submicron accuracy fiber taper profiling using whispering gallery modes in a cylindrical fiber micro-resonator

Yuliya Semenova, Vishnu Kavungal, Qiang Wu, Gerald Farrell

Proceedings Volume 9634, 96343F (2015) https://doi.org/10.1117/12.2194986

KEYWORDS: Resonators, Profiling, Microresonators, Optical fibers, Spectroscopy, Geometrical optics, Scanning electron microscopy, Optical fabrication, Radio propagation, Control systems

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Proceedings Article | 1 July 2015 Paper

Polymer fiber Bragg grating force sensors for minimally invasive surgical devices

Ginu Rajan, Sunish Mathews, Dean Callaghan, Gerald Farrell, Gang-Ding Peng

Proceedings Volume 9655, 96551E (2015) https://doi.org/10.1117/12.2184117

KEYWORDS: Sensors, Polymers, Fiber Bragg gratings, Polymeric sensors, Tissues, Calibration, Laparoscopy, Fiber optics sensors, Surgery, Temperature metrology

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Proceedings Article | 5 May 2015 Paper

Polarimetric and Fiber Bragg Grating reflective hybrid sensor for simultaneous measurement of strain and temperature in composite material

Marcin Bieda, Piotr Lesiak, Mateusz Szeląg, Michał Kuczkowski, Andrzej Domański, Tomasz Woliński, Gerald Farrell

Proceedings Volume 9506, 95060D (2015) https://doi.org/10.1117/12.2178628

KEYWORDS: Sensors, Polarimetry, Fiber Bragg gratings, Temperature metrology, Composites, Fiber optics sensors, Reflectivity, Polarization, Optical fibers, Polarizers

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Proceedings Article | 2 June 2014 Paper

A photonic crystal fibre tip refractometer based on multimode interference

Pengfei Wang, Ming Ding, Lin Bo, Yuliya Semenova, Gilberto Brambilla, Gerald Farrell

Proceedings Volume 9157, 91578F (2014) https://doi.org/10.1117/12.2059596

KEYWORDS: Refractive index, Sensors, Carbon dioxide lasers, Gold, Structured optical fibers, Photonic crystal fibers, Surface plasmons, Fiber optics sensors, Optical components, Optical fibers

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Proceedings Article | 2 June 2014 Paper

A high sensitivity refractometer based on a tapered SCSMF structure and its application to biosensing

Qiang Wu, Youqiao Ma, Yuliya Semenova, Jinhui Yuan, Lin Bo, Pengfei Wang, Xinzhu Sang, Mianzhen Teng, Chongxiu Yu, Christy Charlton O'Mahony, Gerald Farrell

Proceedings Volume 9157, 91574U (2014) https://doi.org/10.1117/12.2059270

KEYWORDS: Sensors, Structured optical fibers, Biosensing, Refractive index, Water, Fiber optics sensors, Fiber Bragg gratings, Cladding, Single mode fibers, Liquids

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Proceedings Article | 2 June 2014 Paper

Microfiber coupler based biosensor incorporating a layer of gold nanoparticles with improved sensitivity

Yuliya Semenova, Lin Bo, Pengfei Wang, Furong Tian, Hugh Byrne, Gerald Farrell

Proceedings Volume 9157, 91578T (2014) https://doi.org/10.1117/12.2059662

KEYWORDS: Microsoft Foundation Class Library, Nanoparticles, Gold, Sensors, Biosensors, Fiber optics sensors, Fabrication, Optical fibers, Polymers, Metals

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Proceedings Article | 2 June 2014 Paper

Study of whispering gallery modes in a cylindrical microresonator excited by a tilted fiber taper

Vishnu Kavungal, Lin Bo, Qiang Wu, Mianzhen Teng, Chongxiu Yu, Gerald Farrell, Yuliya Semenova

Proceedings Volume 9157, 91578N (2014) https://doi.org/10.1117/12.2059654

KEYWORDS: Microresonators, Resonators, Multimode fibers, Optical fibers, Fiber couplers, Sensors, Microscopes, Photonics, Optical communications, Telecommunications

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SPIE Journal Paper | 19 May 2014

Suppression of Raman soliton self-frequency shift in photonic crystal fibers with tellurite subwavelength core

Shuai Wei, Jinhui Yuan, Chongxiu Yu, Sha Li, Boyuan Jin, Xiaoming Hu, Gerald Farrell, Qiang Wu

OE, Vol. 53, Issue 05, 056109, (May 2014) https://doi.org/10.1117/12.10.1117/1.OE.53.5.056109

KEYWORDS: Solitons, Glasses, Dispersion, Raman spectroscopy, Photonic crystal fibers, Silica, Refractive index, Radio propagation, Cladding, Waveguides

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SPIE Journal Paper | 5 May 2014

Scheme for multicast parametric synchronous optical sampling

Xianting Zhang, Zhe Kang, Jinhui Yuan, Qiang Wu, Gerald Farrell, Xinzhu Sang, Chongxiu Yu

OE, Vol. 53, Issue 05, 056102, (May 2014) https://doi.org/10.1117/12.10.1117/1.OE.53.5.056102

KEYWORDS: Signal processing, Distortion, Single mode fibers, Optical engineering, Dispersion, Picosecond phenomena, Digital signal processing, Photonics, Computer simulations

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Proceedings Article | 2 May 2014 Paper

Periodically tapered photonic crystal fibre based strain sensor fabricated by a CO2 laser technique

Gerald Farrell, Lin Bo, Chunying Guan, Yuliya Semenova, Pengfei Wang

Proceedings Volume 9128, 91280G (2014) https://doi.org/10.1117/12.2053926

KEYWORDS: Sensors, Carbon dioxide lasers, Fiber optics sensors, Single mode fibers, Photonic crystal fibers, Structured optical fibers, Fabrication, Heterojunctions, Ions, Refractive index

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Proceedings Article | 11 September 2013 Paper

Hybrid waveguide based long-range surface plasmon biosensor

Youqiao Ma, G. Farrell, Y. Semenova, Q. Wu

Proceedings Volume 8812, 88120T (2013) https://doi.org/10.1117/12.2024172

KEYWORDS: Refractive index, Waveguides, Biosensors, Dielectrics, Metals, Finite element methods, Sensors, Biological research, Surface plasmons, Surface plasmon polaritons

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Proceedings Article | 20 May 2013 Paper

Experimental study of temperature response of a microfiber coupler sensor with a liquid crystal overlay

Yuliya Semenova, Lin Bo, Pengfei Wang, Sunish Mathews, Qiang Wu, Mianzhen Teng, Chongxiu Yu, Gerald Farrell

Proceedings Volume 8794, 87942L (2013) https://doi.org/10.1117/12.2026008

KEYWORDS: Liquid crystals, Microsoft Foundation Class Library, Polymers, Temperature metrology, Sensors, Optical fibers, Telecommunications, Overlay metrology, Tunable filters, Ultraviolet radiation

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