.

Dr John Williams

Dr John Williams

Reader


Phone Number: 0121 204 3543
Email: J.A.R.Williams@aston.ac.uk 


Interests:

As a member of the Aston Institute of Photonic Technologies research interests include the design and fabrication of in-fibre Bragg Gratings and their application as sensors, for the control of short pulses and for the processing and control of sub-carrier multiplexed microwave signals. 

As an associate member of the Adaptive Communications Networks Research Group my interests include wireless sensor networks -  using theoretical, experimental and CAD design techniques used to investigate novel architectures and protocols through to implementation on hardware and field trials. I have a particular interest in developing simulation and test bed frameworks to robustly compare and measure the bounds on reliability and responsiveness for wireless sensor networks including both physical process and realistic radio channel models with an aim to extend the applicability of WSN to meet safety critical application requirements.

Selected Publications:

  • E. Turitsyna, A. Gbadebo, and J. Williams, “A technique for mitigating the effect of the writing beam profile on fibre bragg grating fabrication,” Opt. Express., vol. 23, no. 10, p. 12628, May 2015.
  • A. V. Turchin, M. Dubov, and J. A. R. Williams, “In situ measurement and reconstruction in three dimensions of femtosecond inscription-induced complex permittivity modification in glass,” Opt. Lett., vol. 35, no. 17, pp. 2952–2954, Sep 2010.
  • A. Gbadebo, E. Turitsyna, and J. Williams, “Experimental comparison of differing design approaches for multichannel fibre bragg gratings,” in The European Conference on Lasers andElectro-Optics, San Jose, California,US, May 2015.
  •  ——, “Evaluation of impact of beam size on fibre bragg grating fabrication,” in Bragg Gratings, Photosensitivity, and Poling in Glass Waveguides. Barcelona, Spain: Optical Society of America, July 2014, p. BW1D. 5.
  • A. Gbadebo, E. Turitsyna, X. Shu, and S. Williams, J.A.R.; Turitsyn, “Fibre grating filters for suppression of near infrared oh emission lines,” in Proceedings of the 39th European Conference on Optical Communications (ECOC 2013), London, UK, sep 2013, pp. 1,3