Photonics Research Centre

 

 

           Photonics Research centre

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Journal Publications

1.     Farrell, G., Phelan, P. and Hegarty, J.: "Self-Pulsation operating regime for the Absorber of a twin section laser diode", Electronic Letters., 1991, Vol 27, No. 16, pp. 1403-1404 

2.     Farrell, G., Phelan, P. and Hegarty, J.: "All-optical synchronisation with Frequency division using a self-pulsating laser diode", Electronic Letters., 1992, Vol 28, No. 8, pp. 738-739

3.     Phelan, P., Farrell, G. and Hegarty, J.: "All-optical synchronisation and Frequency Division of Mode-Locked Pulses", Photonics Technology Letters,  August 1992, Vol 4, No. 8, pp. 930-932

4.     Farrell, G., Phelan, P. and Hegarty, J.: "All optical clock distribution with synchronous frequency division and multiplication", Electronic Letters., 1992, Vol 28, No. 15, pp. 1387-1388 

5.     Phelan, P., Farrell, G., and Hegarty, J.: "All-optical Synchronisation and Multiplication of the Frequency of Mode-locked Signals", Photonics Technology Letters, Vol 4,  No. 12, pp 1332-1335, December 1992

6.     Phelan, P., Farrell, G., and Hegarty, J.: "New Optical Signal Processing Functions in Laser Diodes; Frequency Division and Multiplication", Optics and Photonics News, Special issue on "Optics in 1992",  December 1992

7.     Farrell, G., Phelan, P., and Hegarty, J.: "The Influence of the Unlocked Characteristics of a Self-Pulsating Laser Diode on Synchronisation", Photonics Technology Letters, Vol 5 May 1993

8.     Farrell, G., Phelan, P., Hegarty, J., and Shields, J.A.: "All-optical Timing Extraction with Frequency Division using a Twin Section Laser Diode",  Photonics Technology Letters, Vol 5 June 1993

9.     Phelan, P., McDonald, D., Egan, A., Hegarty, J.,  O'Dowd, R., Farrell, G., Lindgren, S., "Comparison of self-pulsation in multisection lasers with distributed feedback and intracavity satuarable absorbers", IEE Proceedings in Optoelectronics, Vol. 141, No. 2, Apr. 1994, pp 114-118.

10.   Hyland, J. and Farrell, G. "Instability in Self-pulsation and its effects on All-optical synchronisation", Dec. 1994, Optical Engineering Journal, SPIE.

11.   Egan, A. O'Gorman, G., Rees, P., Farrell, G., Hegarty, J., Phelan, P.: "Frequency Dependence of phase difference between synchronised self-pulsating laser emission and injected periodic signals", Electronics. Letters., May 1995, Vol 31, No. 10, pp 802-803

12.   Egan A, Rees P, OĦŻGorman J, Harley-Stead M, Farrell G, Hegarty J, Phelan P.: "Theoretical investigations of electro-optical synchronisation of self-pulsating laser diodes. IEE Proceedings in Optoelectronics, Vol. 143, No. 1, Feb. 1996, pp 31-36.

13.   Semenova Y., Panarin Y. and Farrell G, "Optical Switches using electro-optical effects in Liquid Crystals", Proc. SPIE Vol 4876, pp 249-259, 2003

14.   Semenova Y., Dovgalets S., Panarin Y. and Farrell G.: "Liquid Crystal based optical switches", Journal of Molecular Crystals and Liquid Crystals, Vol. 413, pp. 385-398, 2004.

15.   Gao, C. and Farrell, G.: "Power Coupling between two Step-index Multimode Fibers of Different Numerical Apertures with an Angular Misalignment", Microwave and Optical Technology Letters, Vol. 43, No. 3, pp. 231-234, November 2004.  

16.   Wang, Q., Freir, T. and Farrell, G.: "Optimal Design of Broadband Linear Polarization Converters/Switches", Journal of Optics A: Pure and Applied Optics, 7, 2005, pp 47-50.

17.   Wang, Q., Farrell, G., Freir, T.: "Theoretical and Experimental Investigations of Macro-bend Losses for Standard Single Mode Fibers", Optics Express, Vol 13, No. 12. pp. 4476-4484,  June 2005

18.   Wang, Q., Farrell, G., Freir, T.: "Study of Transmission Response of Edge filters Employed in Wavelength Measurements", Applied Optics, Vol. 44, No.36, pp. 7789-7792, 2005

19.   Wang, Q., Farrell, G., Freir, T.: "Effective Index Method for Planar Lightwave Circuits Containing Directional Couplers", Optics Communications, 259, pp.133-136, 2006, pp 133-136

20.   Wang, Q., Farrell, G., Semenova, Y.: "Modeling Liquid-crystal Devices with Three-dimensional Full-vector Beam Propagation Method", Journal of the Optical Society of America A, Vol 23, No. 8, August 2006, pp 2014-2019

21.   Wang, Q., Farrell, G., "All-fiber Multimode-interference Based Refractometer Sensor: Proposal and Design", Optics Letters, Vol. 31, No. 3, 2006, pp. 317-319

22.   Wang, Q., Farrell, G., "Multimode Fiber based Edge Filter for Optical Wavelength Measurement Application", Microwave and Optical Technology Letters, Vol. 48, No. 5, May 2006, pp. 900-902

23.   Wang, Q., Farrell, G., Freir, T., Rajan. G. and Wang, P.: "Low-cost Wavelength Measurement based on a Macrobending Singlemode Fiber", Optics Letters, June 2006, Vol. 31, Issue 12, pp. 1785-1787

24.   Wang, Q., Farrell, G. and Semenova, Y.: "Optimal Design of Birefringent Filter with a Flattop Passband", Journal of Optics. A: Pure Appl. Opt, 8 (2006) 652-656.

25.   Wang, Q., Farrell, G. and Semenova, Y.: "Design of Integrated Polarization Beam Splitter with Liquid Crystal", IEEE Journal of Selected Topics in Quantum Electronics, Special issue devoted to Silicon Photonics, Vol 12, No. 6, November/December 2006, pp. 1349-1353

26.   Wang, Q., Farrell, G., Wang, P., Rajan. G. and Freir, T.: "Design of Integrated Wavelength Monitor based on a Y-branch with an S-bend Waveguide" Sensors and Actuators A: Physical, Vol.134, No.2, 2007, pp.405-409

27.   Rajan, G., Wang, Q., Farrell, G., Semenova, Y. and Wang, P.: "Effect of SNR of an input signal on the accuracy of a ratiometric wavelength measurement system", Microwave and Optical Technology Letters, Vol. 49, Issue 5, May 2007, pp. 1022-1024

28.   Wang, Q., Rajan. G., Farrell, G., Wang, P., Semenova, Y. and Freir, T.: "Macrobending fiber loss filter, ratiometric  wavelength measurement and application", Measurement Science and Technology, Vol. 18 No. 10, October 2007, pp 3082¨C3088

29.   Wang, Q., Rajan. G., Wang, P. and Farrell, G.: "Polarization dependence of bend loss for a standard singlemode fiber", Optics Express, Vol. 15, Issue. 8, April 2007, pp. 4909-4920

30.   Wang, P., Wang, Q., Farrell, G., Rajan, G, Freir, T. and Cassidy, J.: "Investigation of macrobending losses of standard single mode fiber with small bend radii", Microwave and Optical Technology Letters, Vol. 49,  Issue 9, September 2007, pp. 2133-2138

31.   Wang, P., Farrell, G., Wang, Q. and Rajan. G.: "An optimized macrobending fiber based edge filter", Photonics Technology Letters, August 2007, Vol. 19,  Issue 15, pp. 1136-1138

32.   Rajan, G.,  Semenova, Y., Wang, Q., Farrell, G., and Wang, P.: "A method to measure reference strain in FBG strain sensor interrogation system involving actuators", Microwave and Optical Technology Letters, Volume 49, Issue 11, November 2007, pp 2658-2661

33.   Wang, Q. and Farrell, G.: "Integrated Liquid Crystal Switch for both TE and TM modes: Proposal and Design", Journal of the Optical Society of America A, Vol. 24, No. 10, October 2007 pp 3303-3307

34.   Wang, Q., Rajan, G., Wang, P. and Farrell, G.: "Resolution investigation of ratiometric wavelength measurement system", Applied Optics, Vol. 46, Issue 25, 2007, pp. 6362-6367    

Conference Publications

1.     Farrell, G., Phelan, P. and Hegarty, J.: "All optical clock distribution with synchronous frequency division and multiplication", European Conference on Optical Communication, TuP-1.24, Berlin, September, 1992

2.     Phelan, P., Farrell, G. and Hegarty, J.: "Injection Locking Properties of Multisection self-pulsating laser diodes", Semiconductor and Integrated Optoelectronics Conference, Cardiff, April, 1992.

3.     Farrell, G., Phelan, P., and Hegarty, J.: "Optoelectronic Variable Frequency Pulse Synthesis", Semiconductor and Integrated Optoelectronics Conference, Cardiff, March, 1993.

4.     Phelan, P., Egan, A., Farrell, G. and Hegarty, J.: "Self-pulsation and relaxation Oscillation Frequencies in Laser diodes", Semiconductor and Integrated Optoelectronics Conference, Cardiff, March, 1993.

5.     Farrell, G., Phelan, P., and Hegarty, J.: "Optoelectronic Variable Frequency Pulse Generation", European Conference on Optical Communication, Switzerland, Sept., 1993.

6.     Hyland, J. and Farrell, G.: "The Effect of Temperature on the Self-Pulsation Frequency of Twin Section Laser Diodes", Irish Optoelectronics Group conference, Limerick, May 1993.

7.     Houston, S. and Farrell, G.:  "RF Spectral Analysis of Self-pulsating Frequency Shift Keying", Irish Optoelectronics Group conference, Limerick, May 1994.

8.     Fingleton, M. and Farrell, G.:  "Computer Based Training in Optical Communications Systems", Irish Optoelectronics Group conference, Limerick, May 1994.

9.     Hyland, J. and Farrell, G.:  "Active Temperature Control of a Self-pulsating Laser Diode", Irish Optoelectronics Group conference, Limerick, May 1994.

10.   Fingleton, M. and  Farrell, G.:  "Performance Analysis of the Fibre Distributed Data Interface", Optoelectronics and Photonics Europe Conference, Dublin, May 1996.

11.   Molony, C. and  Farrell, G.:  "Synchronisation Detection for Self-Pulsating  Laser Diodes", Lasers and Optical Engineering Conference, Galway, June 1997

12.   Gobbett, B., Downing, C.P., Farrell, G. and Foley, B.: "Factors Limiting the Range of the Basic Rate ISDN U-Interface", Irish Signals and Systems Conference, University of Ulster, June 1997

13.   OĦŻLeary, P and  Farrell, G. : "Low bit rate communications over the ISDN and the low voltage network", Irish Signals and Systems Conference, D.I.T. Kevin St., June 1998

14.   Molony, C. and Farrell, G.: "Synchronisation detection for Self-Pulsating Laser diodes", International Postgraduate Research Student Conference, D.I.T. Aungier St., November 1998

15.   Semenova, Y., Panarin Y., Dovgalets, S., and Farrell, G.: "Liquid crystal based optical matrix switches", Abstracts of the 19th International Liquid Crystal Conference, Edinburgh, UK, 2002, P667.

16.   Semenova, Y., Panarin, Y. and Farrell, G.: "Optical switches using electro-optical effects in Liquid Crystals". SPIE Opto-Ireland Conference, Galway, September 2002

17.   Gao, C. and Farrell, G.: "Numerical aperture characteristics of angle-ended plastic optical fibre". SPIE Opto-Ireland Conference, Galway, September 2002

18.   Chang, M., Panarin, Y. and Farrell, G.: "Real grey-scale in electrooptic response in a novel liquid crystal phase", SPIE Opto-Ireland Conference, Galway, September 2002

19.   Farrell, G. and Quinn, D.: "Enhancing student learning in physical layer design for optical communications networks". SPIE Opto-Ireland Conference, Galway, September 2002

20.   Quinn, D. and Farrell, G.: "Responsivity of RCLEDs for use in bi-directional fibre communications systems", IEE/IEEE Telecommunications Systems Research Symposium, Dublin, May 2003.

21.   Freir, T. and Farrell, G.: "Suitability of SMF28 fibre as a wavelength filter using the bend loss technique", IEE/IEEE Telecommunications Systems Research Symposium, Dublin, May 2003.

22.   Gao, C. and Farrell, G.: "Modelling of Rayleigh backscattering in plastic optical fibre", IEEE High Frequency Postgraduate student colloquium, Belfast, Sept. 2003.

23.   McMillan,  N.D.,  Denieffe, D.,  Riedel, S.,  Tiernan, K., McMillan, D.G.E ., Farrell, G., Kennedy, D.,   Egan, J.,  Doyle,  G.,  Augousti, A., and Mason, J.:  "Theoretical enquiry into the use of data entropy methods for optoelectronic-fibre system-digital design", IT&T Conference, Letterkenny, Oct. 2003.

24.   Semenova, Y., Lee, S., Panarin, Y. and Farrell, G.: "Total reflection optical switch using a nematic Liquid Crystal", 15th International Conference on Liquid Crystals, Zakopane, Poland, 13-17 Oct. 2003.

25.   Gao, C. and Farrell, G.: "Downlink coupling of a novel POF directional coupler", SPIE Opto-Ireland Conference, Dublin, April 2005, Paper Ref. 5825-84

26.   Semenova, Y., Panarin, Y. and Farrell, G.: "High-speed switch for all-optical networks based on a ferroelectric liquid crystal", SPIE Opto-Ireland Conference, Dublin, April 2005, Paper Ref. 5825-92

27.   Wang, Q. and Farrell, G.: "Modelling and analysis of fibre bending loss", SPIE Opto-Ireland Conference, Dublin, April 2005, Paper Ref. 5825-80

28.   Freir, T.M. and Farrell, G.: "Temperature dependence of a multiple turn bend loss component based on SMF28", SPIE Opto-Ireland Conference, Dublin, April 2005, Paper Ref. 5825-82

29.   McMillan, N.D., Egan, J.J., Denieffe, D., Farrell, G., McGowan, G., Riedel, S., Tiernan, K., McMillan, D.G.E ., Kennedy, D.,   Doyle,  G.,  Augousti, A..:  "A new data diffraction method for digital signal analysis and optoelectronic-fibre system-digital design", SPIE Opto-Ireland Conference, Dublin, April 2005, Paper Ref. 5825-90

30.   McMillan, N.D., Egan, J.J., Denieffe, D., Farrell, G.: "Optical Telecommunications System and Signal Analysis using Data-Entropy and Multiple-Centroid Data-Scatter", SPIE Photonics North conference proceedings, Toronto, 12-14 September 2005, Paper Ref. 5970-65

31.   Semenova, Y., Panarin, Y. and Farrell, G.: "Fast Free-Space Photonic Switch Based on a Ferroelectric Liquid Crystal", SPIE Photonics Europe, Strasbourg, 3-7 April 2006

32.   Wang, Q. and Farrell, G.: "Numerical Investigation of Multimode Interference in a Multimode Fiber and its Applications in Optical Sensing". SPIE Photonics Europe, Strasbourg, 3-7 April 2006

33.   Farrell, G. and Gao, C.: "Sources and levels of crosstalk in a bi-directional Plastic Optical Fibre data transmission link", SPIE Photonics Europe, Strasbourg, 3-7 April 2006

34.   Bent, S., Moloney, A. and Farrell, G.: "LEDs as both Optical Sources and Detectors in Bi-directional Plastic Optical Fibre Links", IET Irish Signals and Systems Conference, Dublin, June 2006.

35.   Wang, Q., Farrell, G., Wang, P., Rajan, G., Semenova, Y. and Freir, T.: "Macrobending Standard Singlemode Fiber and its Novel Application in Optical Sensing", OSA Optical Fiber Sensing Conference, Mexico, 23-27 October  2006

36.   Semenova, Y., Farrell, G., Wang, Q. and  Rajan, G.: "Demodulation of Multiple Fibre Bragg Grating Sensors using a Ferroelectric Liquid Crystal Tunable Filter", OSA Optical Fiber Sensing Conference, Mexico, 23-27 October  2006

37.   Rajan, G., Semenova, Y., Wang, Q., Farrell, G and Wang, P.:  "Fibre bend loss ratiometric wavelength demodulation system for an FBG strain sensor", Photonics 2006, Hyderabad, India, 9-11 December 2006

38.   Wang, Q., Farrell, G. and Wang, P.: "Resolution of a ratiometric system for wavelength measurement", SPIE International Congress on Optics and Optoelectronics, Prague, 16-19 April 2007, Ref: 6585-08

39.   Semenova, Y., Farrell, G. and Rajan, G.: "Fabry-Perot liquid crystal tunable filter for interrogation of multiple Fibre Bragg Grating sensors", SPIE International Congress on Optics and Optoelectronics, Prague, 16-19 April 2007, Ref: 6587-39

40.   Wang, Q., Farrell, G. and Hatta, A.: "Optimization of multimode interference structure for ratiometric wavelength measurement", Third European Workshop on Optical fibre Sensors, Naples, Italy, 4-6 July, 2007

41.   Chuckravanen, D., Moloney, A. and Farrell, G.: "Depth Measurement using a Time-Of-Flight Method based on Time-Correlated Single Photon Counting", IET Irish Signals and Systems Conference, Londonderry, N. Ireland, 13-14 September, 2007