Angela Amphawan

Communications Research Group,
Department of Engineering Science,
University of Oxford, Oxford, OX1 3PJ.
E-mail: angela2304 dot gmail dot com

Research:

A majority of local area network (LAN) building backbone links are 62.5/125micrometre graded-index multimode fibre, mostly less than 300m long. With growing demands for high bandwidth, typical multimode fibre (MMF) using conventional transmission methods will soon no longer be able to support future multi-gigabit rate demands. Although alternatives to MMF such as single mode fibre exist, the high price for replacing current infrastructure has fuelled research on possible techniques to support the future demands over existing MMF backbones.

Holographic selective mode excitation by means of a spatial light modulator (SLM) is a new technique for minimizing modal dispersion in MMF and increasing the channel bandwidth. The work on holographic selective mode excitation includes comparison of power coupling efficiency for various selective mode excitation launches into a MMF, experimental work on holographic selective mode excitation using a programmable SLM, modal decomposition of the output field from the holographic selective excitation experiment and bandwidth estimation of the holographic selective mode excitation channel.

Seminars:

1. Holographic Selective Mode Excitation in Multimode Fibre, University Of Oxford Engineering Science Department, Communications Research Group, 27th February 2009, 11am - 12pm
2. Holographic Selective Mode Excitation in Multimode Fibre, St. Edmund Hall Graduates' Seminar, Hosted by Dr. David Priestland, Norham St. Edmund Hall, 2nd March 2009, 7pm - 8pm
3. Optical Multiple-Input-Multiple-Output (MIMO) in Multimode Fibre, Graduates' Lunch, Department of Engineering Science, 28th September 2007

Publications

1. Derivation Of An Analytical Expression For The Power Coupling Coefficient For Offset Launch Into Multimode Fibre, Angela Amphawan, Frank Payne, Dominic O'Brien, Nauman Shah, Journal of Lightwave Technology (accepted)
2. Holographic Selective Mode Excitation in Multimode Fibre, Angela Amphawan, Dominic O'Brien, Frank Payne, Grahame Faulkner (submitted)
3. Dynamic Cell Sizing in CMDA Networks, Angela Amphawan, Ezra Morris Abraham G., Journal of Information and Technology ,Volume 1(3), 2002, pp.264-268
4. An Integrated Model for Cell Attenuation in Dynamic Cell Sizing, Angela Amphawan, Ezra Morris, G. Radhamani, International Journal of System Modeling and Simulation, July 2004
5. Dynamic Cell Sizing in CDMA Networks", Proceedings of the Second IEEE International Symposium on Communications and Information Technology ISCIT 2002 , Angela Amphawan, Ezra Morris Abraham G., G. Radhamani, pp.21-24
6. Diverse Cell Interactions in Dynamic Cell Sizing and VC-PGA Cell Priority Selection Method, IEEE Proceedings of the Eighth IEEE International Conference on Communications Systems ICCS 2002 , Angela Amphawan, Ezra Morris Abraham G, Volume 8, pp. 459-463
7. Security Issues in Third Generation Mobile Systems, IEEE Proceedings of the Eighth IEEE International Conference on Communications Systems ICCS 2002 , 2002, G. Radhamani, K. Ramasamy, Angela Amphawan, M. Siddiqi, Volume 8, pp. 285-288

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