Dr. Kieran O'Mahoney

Dr. Kieran O’Mahoney is a post-doctoral researcher with the Optics Research Group in Waterford Institute of Technology. He completed his PhD degree in W.I.T. in 2007 and after a brief period as an optical engineer with StockerYale (IRL) he returned to the Optics Research Group to take up his current position. He has experience in the areas of interferometric spectroscopy, fibre optic sensor interrogation, doped optical-fibre amplification, fibre component reliability, automation and control. He has published and submitted 3 journal, 6 conference papers and 1 patent application related to the characterization of high-concentration erbium doped fibres and lasers, Michelson / Mach-Zehnder interferometric fibre Bragg grating-based temperature sensor demodulation systems and fibre component reliability. He has also worked as a visiting researcher in Aston University, Birmingham, U.K. on a project to determine the implications of high power losses in optical fibres.


Email: komahoney@wit.ie

Journal and Conference Publications:


Short-scan interferometer for high-resolution Bragg grating array interrogation
K.T. O'Mahoney, R.P. O'Byrne, S.V. Sergeyev, L. Zhang and I. Bennion
Wateford Institute of Technology, Waterford, Ireland.
Aston University,
Birmingham, U.K.
IEEE Sensors Journal, Vol. 9, No. 10, Oct. 2009.


Upconversion Assisted Auto-Oscillations in Erbium Doped Fiber Laser,
Sergey V. Sergeyev, Kieran O’Mahoney, Sergei Popov, Ari T. Friberg
Waterford Inst. of Technology, Ireland, 2 Royal Inst. of Technology, Sweden,
Helsinki Univ. of Technology, Finland,
Univ. of Joensuu, Finland.
CLEO, Baltimore, U.S.A., 2009.

Pump-to-Signal Intensity Noise Transfer as the Mechanism of Self-Pulsing in Erbium Doped Fiber Laser
Sergey V. Sergeyev, Kieran O'Mahoney, Sergei Popov2, Ari T. Friberg2,3,4
Waterford Inst. of Technology, Ireland,
2Royal Inst. of Technology, Sweden,
 3Helsinki Univ. of Technology, Finland,
 4Univ. of Joensuu, Finland.


Upconversion assisted self-pulsing in a high-concentration erbium doped fiber laser
Sergey V. Sergeyev1, Kieran O'Mahoney1, Sergei Popov2, Ari T. Friberg2,3,4
 1Waterford Inst. of Technology, Ireland,
2Royal Inst. of Technology, Sweden,
 3Helsinki Univ. of Technology, Finland,
4Univ. of Joensuu, Finland.
Central European J. Physics (2008) Accepted.

Implications of high-power losses in IR femtosecond laser inscribed fiber Bragg gratings.
K. T. O’Mahoney1, A. S. Main2, D. J. Webb2, A. Martinez2, and D. A. Flavin1.
Waterford Inst. of Technology, Ireland
2Aston University, Birmingham, U.K.


Short-Scan Fiber Interferometer for High-Resolution Bragg Grating Array Interrogation
K. T. O'Mahoney1, R. P. O'Byrne1, S. V. Sergeyev1, L. Zhang2 and I. Bennion2
1Waterford Institute of Technology, Waterford, Ireland.
 2Aston University, Birmingham, U.K.
Proceedings of S.P.I.E. Reliability of Optical Fiber Components, Devices, Systems and Networks III, vol. 6193 (H. G. Limberger and M. J. Matthewson, eds.), Strasbourg, (France),May 2006.

Demodulation of serial fibre Bragg grating arrays by Fourier transform spectroscopy using an over-moded laser reference
K. T. O’Mahoney1, D. A. Flavin1, L. Zhang2, and I. Bennion2
1Waterford Inst. of Technology, Ireland
2Aston University, Birmingham, U.K.
Proceedings of S.P.I.E. 17th International Conference on Optical Fibre Sensors, vol. 5855 (M. Voet, R.Willsch,W. Ecke, J. Jones, and B. Culshaw, eds.), (Brugges, Belgium), pp. 651-654,May 2005.

High-resolution interferometric spectroscopy for analysis of fibre Bragg grating sensor arrays
K. T. O’Mahoney1, D. A. Flavin1, L. Zhang2, and I. Bennion2,
1Waterford Inst. of Technology, Ireland,
Aston University, Birmingham, U.K.
Opto-Ireland, Optical Sensing and Spectroscopy, Oral Presentation, April 2005.

Fourier transform-based spectral measurements on multiplexed fibre Bragg grating arrays
K. T. O’Mahoney1, D. A. Flavin1, L. Zhang2, and I. Bennion2
1Waterford Inst. of Technology, Ireland
2Aston University, Birmingham, U.K.
Proceedings of S.P.I.E. Second European Workshop on Optical Fibre Sensors, vol. 5502 (B. Culshaw, ed.), (Santander, Spain), pp. 423–426, 2004.