Home > People > Ginu Rajan

   Dr. Ginu Rajan, Vice-Chancellor's Research Fellow
 

  

Photonics & Optical Communications Group

School of Electrical Engineering  & Telecommunications

The University of New South Wales (UNSW)

Kensington, Sydney

NSW-2052, Australia

Contact:

Email: ginu.rajan@unsw.edu.au, ginurajan@gmail.com

Ph: +61-2938-54892 (Off)

      +61-421146963 (mob)

 

Room No: 339, Building G17

   Academic Qualifications

PhD Optical Engg, 2009, Dublin Institute of Technology, Ireland

MSc Applied Physics, 2002, Mahatma Gandhi University, Kerala, India

BSc Physics, 2000, University of Kerala, India

 

   Employment

Vice-Chancellors  Research Fellow, Feb 2012- onwards

Research Associate/Project Manager, March 2009- Feb 2012, Dublin Institute of Technology, Ireland

Asst. Lecturer, January 2009- July 2011, School of Electronic & Communications Engg, Dublin Institute of Technology, Ireland

Research Trainee, 2003-2005, Indian Institute of Astrophysics, Bangalore, India

 

   Awards/Recognitions

UNSW Vice-Chancellor's Post doctoral Research Fellowship, 2012

Invited tutorial speaker for the IEEE Sensors 2011 Conference

Biography published  in "Who's who is the World" 2010 Edition

PhD Research Scholarship from Dublin Institute of Technology (2005-2008)

Research Trainee Fellowship from Indian Institute of Astrophysics, Bangalore, India (2003-2005), GATE 2004.

 

  Professional Activities

IEEE, SPIE- Member

Member, Journal Editorial Board:- The World Scientific Journal (Hindawi publications) 2012-

Member, Technical Program Committee, 2nd Global Conference on Materials Science and Engineering (CMSE 2013), Hubei, China

Reviewer of the Journals: Measurement Science and Technology, Journal of Optics, Smart Materials and Structures, Journal of Optomechatronics, PIER, IEEE Journal of Lightwave Technology, Sensors and Actuators A, IEEE Sensors Journal,, IEEE Photonics Technology Letters,  Sensors, MDPI Materails

Member, Research Consultation Committee, Faculty of Engg, DIT- Member (2006-2008)

Member, Postdoctoral Academy Advisory Committee, UNSW, 2013

 

  Research Interests

Fiber optic sensors and applications, FBG sensors, Photonic crystal fiber sensors, Fiber edge filters, Fast optical wavelength measurements, Smart structures and sensors, Fiber sensors for Biomedical instruments.

 

  Research Projects

Ongoing

Sandwich Composites with Embedded FBG sensors

Singlemode Polymer Micro-Fibre Bragg Gratings for Biomedical Applications (FRP/ECR Grant 2013)

Biomedical Applications of Optical Fiber Sensors (VC Research Fellowship 2012-2014)

Composite Materials with Embedded Fiber Optic Sensors (Matera, DIT, Ireland)

 

Completed

Integration of research and learning in fiber optic sensing technology (NAIRTL fund, 2009-2010)

Macrobend fiber temperature sensor and its applications (Enterprise Ireland, Proof of Concept Fund, 2008-2010)

 

  Teaching

Optical Sensing, MSc  Electronics & Communication Engg (2009-2011, DIT)

Photonics Networks/Optical Communication Systems (50%), ME/BE, UNSW

Optical Circuits and Fibres (50%), ME/BE, UNSW

Student group mentor, ENG 1000, UNSW (2012)

Research and Project Students

Mr. Kishore Bhowmik, PhD Student, UNSW (2013-), Joint Primary Supervisor

Ms. Manjusha Ramakrishnan, PhD Student at DIT (2010- ), Co- Supervisor

 

Mr. Gilse George, ME Student, (2013-2014), Primary Supervisor

Ms. Lydia Dudko (Masters Student (Exchange Student from MIREA, Moscow), 2011)

Mr. Patrick Bertz (Masters Student, DIT, 2010)

Ms. Tatiana Bakhvalova (Masters Student (Exchange Student from MIREA, Moscow), 2009)

 

   Publications

Books

Book Chapters

  • Rajan. G, Semenova. Y, Hatta. A, and Farrell. G, "Passive All-Fiber Wavelength Measurement Systems: Performance Determination Factors", in Advances in Measurement Systems, Intech Publishers, ISBN 978-953-307-061-2, 2010.

  • Callaghan. D., McGrath, M., Rajan, G., Coyle, E., Semenova, Y and Farrell, G,  "Analysis of Strain Transfer to FBG’s for Sensorized Telerobotic End-Effector Applications", in Advances in Robotics Research: Theory, Implementation, Application,  Springer Publishers, ISBN: 978-3-642-01212-9, 2009.

  • Rajan, G, Callaghan, D., Semenova, Y and Farrell, G, “Optical Fiber Sensors and Interrogation Systems for Interaction Force Measurements in Minimally Invasive Surgical Devices", in Smart Sensor for Industrial Applications, CRC Press (Taylor and Francis), ISBN 978-1-466-56810-5, 2013.

  • Rajan, G., “Introduction to Optical Fibre Sensors” in Optical Fiber Sensors:- Advanced Techniques and Applications, CRC Press (Taylor and Francis), Eds., Rajan G and Ineiwski, ISBN  9781482228250, in production.

  • Ramakrishnan M., and Rajan G., "Smart Composite Structures and its Applications", in Optical Fiber Sensors:- Advanced Techniques and Applications, CRC Press (Taylor and Francis), Eds., Rajan G and Ineiwski, ISBN  9781482228250,  in production.

  • Noor Y. M, Peng G-D., Rajan, G., “Optical Fiber Humidity Sensors” in Optical Fiber Sensors:- Advanced Techniques and Applications, CRC Press (Taylor and Francis), Eds., Rajan G and Ineiwski, ISBN  9781482228250, in production.

  • Rajan G, Peng G-D, Polymer Micro and Micro-Structured Fiber Bragg Grating Sensors:- Recent Advancements and Applications”, in Optofluidics, sensors and actuators in microstructured optical fibers, Eds., Pissadakis S., Woodhead Publishers, Eds., Pissadakis S.,  accepted.

Invited Talks

  • Rajan, G., “Smart composite structures with embedded fiber optic sensors”, Invited tutorial for the IEEE Sensors 2011 Conference, October 2011.

  • Rajan, G., “Polymer Fiber Bragg Gratings and their Applications:- Recent Research Updates”, CMOS Emerging Technologies Symposium, Grenoble, France, July 2014.

Patents

  • Rajan. G, Semenova. Y, Farrell. G, "Optical fibre temperature sensing device", UK Patent, GB 2 457 903, Granted June 2012.

Refereed Journal Articles

  • Ramakrishnan M, Rajan. G,  Semenova Y, Gerrams, S., and Farrell G, “The investigation of the effect of vibration amplitude on vibration measurements of polarimetric fiber sensors embedded in composite beams”, Electronics Letters, Vol. 50, Issue 15, pp. 1083-1084, 2014

  • Rajan G, Y. Nor, Ambikiarajah E, Peng G D, “Inscription of Multiple Bragg gratings in a Singlemode Polymer Optical Fiber using Phase Mask and its Analysis”, IEEE Sensors Journal, Vol. 14, pp. 2384-2388, 2014

  • Rajan. G, Ramakrishnan M, Semenova Y, Ambikiarajah E, Farrell G, and Peng G-D., “Experimental Study and Analysis of a Polymer Fiber Bragg Grating Embedded in a Composite Material”, Journal of Lightwave Technology, Vol. 32, pp. 1726-1733, 2014.

  • Ramakrishnan M, Rajan. G, Callaghan D, Semenova Y, and Farrell G, “The investigation of the effect of vibration amplitude on vibration measurements of polarimetric fiber sensors embedded in composite beams”, Smart Materials and Structures, Vol. 23, pp.045037,  2014

  • Ramakrishnan M, Rajan. G, Semenova Y, and Farrell G, “Hybrid Fiber Optic Sensor System for Measuring the Strain, Temperature and Thermal strain of Composite Materials”, IEEE Sensors Journal, Vol. 14. Pp. 2571-2578, 2014.

  • Y. M. Noor, Rajan. G, Peng G D, “Micro-structured Fiber Sealed-void Interferometric Humidity Sensor”, IEEE Sensors Journal, Vol. 14, pp. 1154-1159, 2014.

  • Ramakrishnan. M, Rajan. G, Semenova. Y, and Farrell. G, “A Miniaturized Flexible Surface Attachable Interrogator for Hybrid Optical Fiber Sensing”, Microwave and Optical Technology Letters,  Vol. 56, pp. 1167-1174, 2014.

  • Rajan G, Y. Nor, Ambikiarajah E, Peng G D, “Inscription of Multiple Bragg gratings in a Singlemode Polymer Optical Fiber using Phase Mask and its Analysis”, IEEE Sensors Journal, accepted, Feb 2014

  • Rajan. G, Ramakrishnan M, Semenova Y, Ambikiarajah E, Farrell G, and Peng G-D., “Experimental Study and Analysis of a Polymer Fiber Bragg Grating Embedded in a Composite Material”, Journal of Lightwave Technology, accepted Feb 2014

  • Ramakrishnan M, Rajan. G, Callaghan D, Semenova Y, and Farrell G, “The investigation of the effect of vibration amplitude on vibration measurements of polarimetric fiber sensors embedded in composite beams”, Smart Materials and Structures, accepted Feb 2014

  • Ramakrishnan M, Rajan. G, Semenova Y, and Farrell G, “Hybrid Fiber Optic Sensor System for Measuring the Strain, Temperature and Thermal strain of Composite Materials”, IEEE Sensors Journal, accepted Jan 2014

  • Y. M. Noor, Rajan. G, Peng G D, “Micro-structured Fiber Sealed-void Interferometric Humidity Sensor”, IEEE Sensors Journal, accepted for publication, Dec 2013.

  • Ramakrishnan. M, Rajan. G, Semenova. Y, and Farrell. G, “A Miniaturized Flexible Surface Attachable Interrogator for Hybrid Optical Fiber Sensing”, Microwave and Optical Technology Letters,  accepted for publication, Dec 2013

  • Rajan. G, Y. Noor, Liu. B, Ambikiarajah. E, Webb. D, and Peng. G-D,  "A Fast Response Intrinsic Humidity Sensor Based on an Etched Singlemode Polymer Fiber Bragg Grating", Sensors and Actuators A: Physical, Vol 203, pp 107-111, 2013

  • Rajan. G, M. Y. M. Noor, Ambikiarajah. E, G. Farrell and Peng. G-D,  "A Polymer Micro-fiber Bragg grating", Optics Letters, Vol. 38, No. 17, pp. 3359-3362, 2013

  • Rajan. G, Liu. B, Luo. Y, Ambikiarajah. E, and Peng. G-D, "High sensitivity force and pressure measurements using etched singlemode polymer fiber Bragg gratings", IEEE Sensors Journal, Vol 13, Issue 5, pp. 1794-1800, 2013.

  • Ramakrishnan. M, Rajan. G, Semenova. Y, Boczkowska. A, Domanski. A., Woliński1. T., and Farrell. G, “Measurement of Thermal Elongation Induced Strain of a Composite Material Using a Polarization Maintaining Photonic Crystal Fiber Sensor", Sensors and Actuators A, Vol 190, pp. 44-51, Feb 2013.

  • Rajan. G, Ramakrishnan. M, Lesiak. P, Semenova. Y, Boczkowska. A, and Woliński1. T., and Farrell. G, "Composite materials with embedded photonic crystal fiber interferometric sensors", Sensors and Actuators A: Physical, Vol. 182, pp 57-67, Aug 2012.  (Featured in Advances in Engineering, Canada)

  • Lesiak. P, Szelag. M, Budaszewsk. D, Plaga R, Milenko K, Rajan G, Semenova Y, Farrell G, Boczkowska A, Domanski A, Tomasz Wolinski T, "Influence of lamination process on optical fiber sensors embedded in composite material", Measurement, Vol. 45, Issue 9, pp. 2275-2280, Nov 2012.

  • Rajan. G, Ramakrishnan. M, Semenova. Y, Boczkowska. A, Domanski. A. and Woliński1. T., and Farrell. G, "Analysis of vibration measurement in composite materials using embedded PM-PCF polarimetric sensor and an FBG sensor", IEEE Sensors Journal, Vol. 12, Issue 5, pp. 1365-1371, 2012.

  • Rajan. G, Callaghan. D, Semenova. Y, Farrell. G, "Photonic crystal fiber sensors for minimally invasive surgical devices”, IEEE Transactions on Biomedical Engg, Vol.  59, No.12, pp. 332-338, 2012.

  • Rajan. G, Ramakrishnan. M, Semenova. Y, et al. "A photonic crystal fiber and fiber Bragg grating based hybrid fiber optic sensor system", IEEE Sensors Journal, Vol. 12, Issue 1, 2012.  (Top download paper Dec2011-March 2012)

  • Ramakrishnan. M, Rajan. G, Semenova. Y, Boczkowska. A, Domanski. A. and Woliński1. T., and Farrell. G, "Influence of thermal expansion of a composite material on embedded polarimetric fiber sensors", Smart Materials and Structures, Vol. 20, No. 12, 2011.

  • Callaghan. D, Rajan. G, McGrath. M, Coyle. E, Semenova. Y, Farrell. G, "Investigation and experimental measurement of scissor blade cutting forces using fiber Bragg gratings", Smart Materials and Structures, Vol 20, No. 10, 2011.

  • Budaszewski D, Lesiak P, Plaga R, Rajan G, Semenova Y, Farrell G, Boczkowska A, Domanski A, Wolinski T, “Influence of Angular Orientation of the Embedded Highly Birefringent Fiber on PMD Changes under Axial Stress”, ACTA PHYSICA POLONICA A,  Vol. 120, Issue.  4, pp. 575-578, 2011

  • Mathew. J, Semenova. Y, Rajan. G, Wang. P, Farrell. G, “Improving the sensitivity of a humidity sensor based on fiber bend coated with a hygroscopic coating”, Optics & Laser Technology, Volume 43, Issue 7, 2011

  • Rajan. G, Mathews. S, Farrell. G, Semenova. Y, "A liquid crystal coated tapered photonic crystal fiber interferometer", Journal of optics, Vol. 13, issue 1, 2011.

  • Wu. Q., Semenova. Y, Rajan. G., Wang. P, Farrell. G., “A study of the effect of source signal bandwidth on ratiometric wavelength measurement”, Applied Optics, Vol. 49, Issue 29, 2010.

  • Lesiak. P, Rajan. G., Semenova. Y, Farrell. G, Boczkowska. A, Domański. A.,  and Woliński1. T., "A hybrid highly birefringent fiber optic sensing system for simultaneous strain and temperature measurement", Photonics Letters of Poland, Vol. 2, 140-142, 2010.

  • Mathew. J., Semenova. Y., Rajan. G., and Farrell, G., “Humidity sensor based on a photonic crystal fiber interferometer”, Electronics Letters, Vol. 46, Issue 19, 2010.

  • Rajan. G, Callaghan. D, Semenova. Y, McGrath. M, Coyle. E, Farrell. G, "A fiber Bragg grating based fiber sensing system for telerobotic cutting applications", IEEE Sensors Journal, Vol. 10, No. 12, 2010.

  • Rajan. G, Semenova. Y, Mathew. J, Farrell. G, "Experimental analysis and demonstration of a low cost temperature sensor for engineering applications", Sensors and Actuators A: Physical , Vol.163, pp. 88-95, 2010

  • Rajan. G, Milenko. K, Lesiak. P, et al., "A hybrid fiber optic sensing system for simultaneous strain and temperature measurement and its applications", Photonics Letters of Poland, Vol 2, 46-48, 2010.

  • Wu. Q,  Rajan. G, Wang. P, Semenova. Y, Farrell. G, "Optimum design for maximum wavelength resolution for an edge filter based ratiometric system", Optics and Laser Technology, Vol. 42, pp 1032-1037, 2010

  • Hatta. A, Semenova. Y, Rajan. G, Farrell. G, "Polarization dependence of an edge filter based on singlemode-multimode-singlemode fibre", Optics and Laser Technology, Vol. 42, pp 1044-1048, 2010

  • Hatta A. M., Semenova, Y., Rajan, G., & Farrell, G., "A voltage sensor based on a singlemode-multimode-singlemode fiber structure", Microwave and Optical Technology Letters, 52(8), 1887-1890, 2010.

  • Hatta. A, Semenova. Y,  Rajan. G, Wang. P, Zheng. J, Farrell. G, Analysis of temperature dependence for a ratiometric wavelength measurement system using SMS fiber structure based edge filters, Optics Communications, Vol. 283, pp 1291-1295, 2010.

  • Hatta. A, Rajan. G, Semenova. Y,  Farrell. G, "A singlemode-multimode-singlemode fiber structure for intensity based temperature measurements", Electronics Letters, Vol. 45, pp. 1069- 1071, 2009.

  • Rajan. G, Semenova. Y, Wang. P, Farrell. G, "Temperature induced instabilities in macro-bend fiber based wavelength measurement  systems", IEEE J. Lightwave Technol., Vol. 27, pp. 1355-1361, 2009

  • Rajan. G, Semenova. Y, Farrell. G, “Analysis and performance evaluation of an all-fiber interrogation system for a Bragg grating array,” Journal of Optics A, Vol. 11, 2009

  • Hatta, A. M., Farrell, G., Wang, P., Rajan, G. and Semenova, Y.: "Misalignment Limits for a Singlemode-Multimode-Singlemode Fiber Based Edge Filter", IEEE J. Lightwave Technol., pp. 2482-2488, Vol. 27, Issue 13, 2009

  • Wang, P., Semenova, Y., Rajan, G., Freir, T., & Farrell, G., "The temperature dependence of polarization-dependent loss for a macrobending single-mode-fiber-based edge filter", IEEE Photonics Technology Letters, 21(8), 516-518, 2009

  • Wang, P., Farrell, G., Semenova, Y., & Rajan, G., "Investigation of polarization-dependent loss for a macrobending loss sensitive single-mode fiber", Microwave and Optical Technology Letters, 51(6), 2008

  • Rajan. G, Semenova. Y, Farrell. G, "An all-fiber temperature sensor based on a macro-bend singlemode fiber loop", Electronics Letters, Vol. 44, pp. 1123- 1124, 2008.

  • Rajan. G, Semenova. Y, Freir. T, Wang. P, Farrell. G, "Modelling and analysis of the effect of noise on an edge filter based  ratiometric wavelength system", IEEE J. Lightwave Technol., Vol 26, pp. 3434-3442, 2008.

  • Wang, P., Rajan, G., Semenova, Y. and Farrell, G.: "Temperature dependence of a macrobending edge filter based on a high-bend loss fiber", Opt. Lett., Vol. 33, No. 21,  pp 2470-2472, 2008.

  • Hatta, A. M.,  Farrell, G., Wang, Q., Rajan, G., Wang, P. and Semenova, Y.: "Ratiometric wavelength monitor based on singlemode-multimode-singlemode fiber structure", Microwave and Optical Technology Letters, Vol. 50, No. 20, pp 3036-3039, 2008

  • Rajan. G, Semenova. Y, Farrell. G, Wang. Q, Wang. P, "A low polarization sensitivity all-fiber wavelength measurement system", IEEE Photon. Technol. Lett., Vol 20, pp. 1464, 2008.

  • Rajan. G, Wang. Q, Semenova. Y, Farrell. G, Wang. P, "Effect of polarization dependent loss on the performance accuracy of a ratiometric wavelength measurement system", IET Optoelectronics, Vol. 2,  2008.

  • Wang, P., Farrell, G., Semenova, Y., & Rajan, G., "Influence of fiber manufacturing tolerances on the spectral response of a bend loss based all-fiber edge filter", Applied Optics, 47(16), 2921-2925, 2008

  • Rajan. G, Semenova. Y, Wang. Q, Farrell. G, Wang. P, "A method to measure the reference strain of FBG interrogation system involving actuators", Microwave and Optical Technology Letters, Vol. 40, No.11, 2007.

  • Rajan. G, Wang. Q, Farrell. G, Semenova. Y, Wang. P, "Effect of  SNR of input signal on the accuracy of a ratiometric wavelength  measurement system",   Microwave and Optical Technology Letters, Vol. 49, 2007.

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

  • 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,  pp. 2133-2138, 2007

  • Wang. Q, Rajan. G, Wang. P, Farrell. G, "Macrobending fiber loss filter, ratiometric wavelength measurement and application",  Measurement Science and Technology, Vol 18, pp 3082-3088, Sept. 2007

  • Wang. Q, Rajan. G, Wang. P, Farrell. G ,"Resolution investigation of ratiometric wavelength measurement system", Applied Optics, Vol. 46, No. 25,  September 2007.

  • Wang, Q., Farrell, G., Wang, P., Rajan, G., & Freir, T., "Design of integrated wavelength monitor based on a Y-branch with an S-bend waveguide" Sensors and Actuators, A: Physical, 134(2), 405-409, 2007

  • Wang. Q, Rajan .G, Wang .P,   Farrell. G, "Polarization dependence of bend loss for a standard singlemode fiber", Optics Express, Vol. 5, Issue 8, April 2007.

  • Wang. Q, Farrell. G, Freir. T, Rajan. G, Wang. P, "Low cost wavelength measurement based on macrobending singlemode fiber", Optics Letters, Vol. 31, No.12, 2006.  

Conference Papers

  • Oromiehie E, Rajan G, Prusty G, and Compston P,  “Performance characterization of sandwich composites embedded with fiber Bragg gratings”, 8th Australasian Conference on Applied Mechanics , Melbourne, accepted, 2014.

  • Rajan G, Bhowmik, K, and Peng G-D., “Polymer fiber Bragg grating sensors: Recent advancements and applications”, ACOFT, Melbourne, 2014.

  • Rajan. G, Darmanin E, Peng G-D, Prusty G., “High Performance Carbon Fibre-Foam Sandwich Composite Embedded with Fiber Bragg Grating Sensors”, OFS-23 Conference, Spain, accepted

  • Bhowmik, K, Rajan G, Ambikiarajah E, and Peng G-D., “Hydrostatic Pressure Sensitivity of Standard Singlemode Polymer Fiber Bragg Gratings and Etched Polymer Fiber Bragg Gratings”, OFS-23 Conference, Spain, accepted. 

  • Rajan. G, Peng G-D,  "Fabrication and Characterization of Polymer Microfiber Grating", APOS 2013, Wuhan, October 2013. 

  • Semenova Y, Kavungal V, Mathews S, Rajan G and Farrell G,  Investigator of Light Propagation in Microstructured Polymer Optical Fibers Infiltrated with Liquid Crystals and its Temperature Dependence”  POF 2013, The 22nd International Conference on Plastic Optical Fibers, Rio De Janeiro, Brazil, Sept 2013.

  • Rajkumar R, Mathews S, Rajan. G, Semenova Y, Farrell G, and Srinivasan, B,  "Fabrication and Characterization of Bragg Gratings in Polymer Optical Fibers using 248 nm Irradiation", Proc. ACP 2013, Beijing, China, Nov 2013.  

  • Semenova. Y, Mathews. S, Rajan. G, Farrell. G, "Control of light propagation in optical fibers using liquid crystals for applications in optical communications and sensing", Proc. 3rd International Conference on Photonics, Penang, Malaysia, 1-3 Oct 2012.

  • Rajan. G, Liu. B, Luo. Y, and Peng. G-D, “Etched Singlemode Polymer Fiber Bragg Gratings for High Sensitivity Tensile Force Measurements", Photonics Global Conference, Singapore, Dec 2012.

  • Rajan. G, Luo. Y, and Peng. G-D, “Etching and Its Effects On Gratings Inscribed In Singlemode Polymer Optical Fiber", ACOFT 2012, Sydney, Dec 2012.

  • Mathews. S, Callaghan. D, Semenova. Y, Rajan. G, Farrell. G,  "Photonic crystal fiber strain sensors for laparoscopic surgical devices", Proc. Photonics Global Conference 2012, Singapore, 13-16 Dec 2012.

  • Mathews. S, Callaghan. D, Semenova. Y, Rajan. G, Farrell. G,  "Temperature insensitive miniature photonic crystal fiber interferometric strain sensors", Proc. Photonics - 2012, Chennai, India, 9-12 Dec 2012.

  • Semenova. Y, Mathews. S, Rajan. G, Farrell. G, "Control of light propagation in optical fibers using liquid crystals for applications in optical communications and sensing", Proc. 3rd International Conference on Photonics, Penang, Malaysia, 1-3 Oct 2012.

  • Ramakrishnan. M, Rajan. G, Semenova. Y, Woliński1. T., and Farrell. G, "Comparison of vibration measurements in composite materials using different types of polarimetric sensors ", Proc. SPIE, Vol. 8421, No. 842178, 2012.

  • Ramakrishnan. M, Rajan. G, Semenova. Y, Woliński1. T., and Farrell. G, "A demodulation scheme for a hybrid sensor system for composite materials Proc. SPIE, Vol. 8439, No. 843929, 2012.

  • Ramakrishnan. M., Rajan. G, Semenova. Y, Farrell. G, "Detection of thermal expansion of carbon and glass reinforced fiber composite materials using polarimetric and fiber Bragg grating sensors", IconTOP, Calcutta, India, Dec 2011.

  • Rajan. G, Ramakrishnan. M., Semenova. Y, Farrell. G, "Performance analysis of composite materials embedded with optical fiber sensors", Proc. IEEE Sensors, pp. 351-354, 2011.

  • M. Ramakrishnan, G. Rajan, Y. Semenova, P. Lesiak, A. Domanski, T. Wolinski and. G. Farrell. “Design of a flexible electro–optic polymer phase modulator for demodulation of polarimetric sensors”, IOS-2011, Szczyrk, Poland.

  • Budaszewski, D, Lesiak. P, Plaga, R, Rajan. G, Semenova Y, Farrell. G, Boczkowska A, Domanski A, Wolinski T,  “Influence of angular orientation of the embedded HB fiber on PMD changes under axial stress”, IOS-2011, Szczyrk, Poland.

  • Rajan. G, Callaghan. D., Semenova. Y,  Farrell. G, "Miniature temperature insensitive fiber optic sensors for minimally invasive surgical devices", Proc. SPIE, Vol. 7753, No. 77536Z, 2011.

  • Mathew. J., Semenova. Y., Rajan. G., and Farrell, G., “Photonic crystal fiber interferometer for dew detection”, Proc. SPIE, Vol. 7753, No. 77531P , 2011.

  • Mathew. J., Semenova. Y., Rajan. G., and Farrell, G, "Agarose coated single mode fiber bend for monitoring humidity", Proc. SPIE, Vol. 8073, No.807317, 2011.

  • Piotr Lesiak , G. Rajan, Yuliya Semenova , etal, "Influence of the lamination process on the strain sensitivity of the fiber sensors embedded in composite materials Proc. SPIE, Vol. 7753, No. 77534Z, 2011.

  • Ramakrishnan. M, Rajan. G, Semenova. Y, Farrell. G, "Composite materials with embedded optical fiber sensors for in-situ structural health monitoring ", WICSM, Dublin, Sept. 2010.

  • Ramakrishnan. M, Rajan. G, Semenova. Y, Farrell. G, "Design of a surface attachable hybrid sensor packaged in polyimide film for engineering applications ", Proc. SPIE, Vol. 7653, No. 76533T, 2010.

  •  Rajan. G, Mathews. S, Farrell. G, Semenova. Y, "Characterization of liquid crystal coated photonic crystal fiber interferometers", Proc. SPIE, Vol. 7726, No. 77261U, 2010.

  • Bakhvalova. T., Rajan. G., Semenova. Y. and Farrell, G, “A tunable high resolution FBG demodulation system using photonic crystal fiber loop mirrors”, OFS 20,  Edinburgh, 2009

  • Mathew. J., Rajan. G., Semenova. Y. and Farrell, G., “All Fiber tunable loss filter”,  OFS20,  Edinburgh, 5 -9 October 2009

  • Rajan. G, Semenova. Y, Farrell. G, “Evaluation of the performance of a novel low-cost macro-bend fiber based temperature sensor,” Proc. SPIE, Vol. 7316, No. 731610, 2009.

  • Mathews. S. J, Semenova. Y, Rajan. G, Farrell. G, "Experimental demonstration of a ferroelectric liquid crystal tunable filter for fast demodulation of FBG sensors", Proc. SPIE, Vol. 7356, No. 73561O, 2009.

  • Hatta, A. M.,  Rajan. G, Farrell. G, Semenova . Y, "Ratiometric wavelength monitor based on “X-type spectral response” using two edge filters ", Proc. SPIE, Vol. 7356, No. 73561N, 2009.

  • Rajan. G, Semenova. Y, Farrell. G, “Applications of macrobend loss in singlemode fibers: FBG interrogator and temperature sensor,” Photonics 2008, New Delhi, December 2008.

  • Rajan. G, Semenova. Y, Farrell. G, "An all-fiber interrogation system for a Bragg grating array", IOP Photon 08,  Edinburgh, UK, August 2008.

  • Rajan. G, Semenova. Y, Farrell. G, Wang. Q, Pengfei. W, "Investigation of the influence of 3dB coupler on ratiometric wavelength  measurements", SPIE Photonics Europe, Strasbourg, April 2008.

  • Mathews. S. J, Semenova. Y, Rajan. G, Farrell. G, "Discretely tunable ferroelectric liquid crystal filter for demodulation of multiple FBG  sensors", Proc. SPIE, Vol. 7003, pp-X31-Y31, 2008.

  • Wang. Q, Rajan. G, Wang. P and Farrell. G, “Resolution of Ratiometric System for Wavelength Measurement”, SPIE Europe: Optics and Optoelectronics, Prague, March 2007.

  • Semenova. Y Farrell. G, Rajan. G,  “Fabry-Perot liquid crystal tunable filter for interrogation of multiple fiber Bragg grating sensors”, SPIE Europe:  Optics and Optoelectronics, Prague, March 2007.

  • Rajan. G, Semenova. Y, Wang. Q, Farrell. G, Pengfei. W, "Fiber bend loss ratiometric wavelength demodulation system for an FBG strain sensor", Photonics 2006, Hyderabad, India.

  • Rajan. G, Murthy. J, Prasad. B.R, "Method to study dark count rate and spatial resolution of an ICCD", BASI, Vol. 33, 2005 

  • Banyal. R, Rajan. G, Prasad. B.R, "Pixel size and pitch measurements of liquid crystal based spatial light modulator by optical diffraction", Photonics  2004, Cochin, India.

  • Shanti. P, Lee. T, Rajan. G, Veena G, Nampoori. V, "Fiber optic based chemical sensor to detect the end point in volumetric analysis", National Laser Symposium, Trivandrum,  India, 2002.