CEIS School Seminar 22/02/12 Improving the Data Rates of Organic Light Emitting Diodes Andrew Burton, Yr 2 Supervisors Dr. Hoa Le Minh Prof. Z. Ghassemlooy.

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CEIS School Seminar 22/02/12 Improving the Data Rates of Organic Light Emitting Diodes Andrew Burton, Yr 2 Supervisors Dr. Hoa Le Minh Prof. Z. Ghassemlooy

CEIS School Seminar Light Emitting Diodes (LED)

CEIS School Seminar Organic Light Emitting Diodes (OLED)

CEIS School Seminar Large Panel OLEDs used for Home and Office Lighting

CEIS School Seminar Visible Light Communications

CEIS School Seminar What are Organic LEDs? Substrate (Glass, plastic) Anode (+’ve) Conductive Layer (Organic Molecules or Polymers) Emissive Layer (Organic Molecules or Polymers) Cathode (-’ve)

CEIS School Seminar OLED Electrical Model Rp = Contact resistance of electrodes Rd = Diode resistance C = Diode capacitance

CEIS School Seminar OLED testing and Characterisation Test 2: Device Linearity Test 1: Illumination Test 3: Bandwidth Test 4: Bit Error Rate

CEIS School Seminar Post Analogue RC Equalization

CEIS School Seminar RC Equalisation Results

CEIS School Seminar ?

Decision Feedback Equalisation (DFE)

CEIS School Seminar DFE Results

CEIS School Seminar Orthogonal Frequency Division Multiplexing (OFDM)

CEIS School Seminar Experimental Setup

CEIS School Seminar OFDM Results

CEIS School Seminar Conclusions  RC analogue equalisation is not suitable for systems running at low data rates  With DFE equalization we can achieve error free communications up to 500 kbps  With OFDM we can achieve error free communications in excess of 3 Mbps

The financial support received from the school of Computing, Engineering and Information Sciences at the University of Northumbria CEIS School Seminar Acknowledgements Fellow author and researcher Paul Anthony Haigh MATLAB Guru Dr. Sujan Rajbhandari

CEIS School Seminar Publications Journal 1.H. Le Minh, Z. Ghassemlooy, A. Burton, P.A. Haigh, S.K. Liaw, “Experimental Study of the equalisation for Organic Light Emitting Diodes in Visible Light Communications”, Conferences 2.A. Burton, C. Amiot, H. Le Minh and Z. Ghassemlooy, “Design of an integrated optical receiver for mobile visible light communications” 12th Annual Symposium on the Convergence of Telecommunications, Networking and Broadcasting, Liverpool, 2011, pp H. Le Minh, Z. Ghassemlooy, A. Burton, and P. A. Haigh, "Equalization for organic Light Emitting Diodes in Visible Light Communications," IEEE Global Communications Conference 2011 (IEEE GLOBECOM 2011), Workshop on Optical Wireless Communications in Houston, USA, 5-9 December, Posters 4.A. Burton, “Smart White LED based Lighting and Communications”, Northumbria Research forum, Newcastle upon Tyne, A. Burton, “Visible Light Communications using Organic Light Emitting Diodes”, EPRSC Photonics Communications Workshop, Oxford, 2011

CEIS School Seminar Publications (under review & writing) Conferences 6. A. Burton, H. Le Minh, Z. Ghassemlooy, S. Rajbhandari,P. A. Haig “Smart Receiver for Visible Light Communications: Design and Analysis” CSNDSP 2012, Poland 7. A. Burton, H. Le Minh, Z. Ghassemlooy “Smart Visible Light Communications Receiver ” IEEC 2012, Vietnam Journal 8.A. Burton, P.A. Haigh, H. Le Minh, Z. Ghassemlooy, S. Rajbhandari and S.K. Liaw, “Increasing Data Rates in Organic Light Emitting Diodes for Visible Light Communications”, IEEE Journal of Light wave Technology 9.A. Burton, H. Le Minh, Z. Ghassemlooy, S. Rajbhandari and S.K. Liaw, “The Full Design and analysis of a Smart Receiver for Visible Light Communications”, IET- Communications

CEIS School Seminar Awards 1.Full Studentship from the School of Computing, Engineering and information Sciences Northumbria University to carry out my Ph.D. 2.Awarded best performing first year PhD student for the School of Computing, Engineering and information Sciences, May IEEE UK & RI Communications Chapter Tutorial grant for “Protection Switching in Communication Networks”, 16th European Conference on Networks and Optical Communications, IEEE Travel grant for Wavelet transform workshop, Northumbria University, 2011

CEIS School Seminar Questions???