Research Seminar on Optical Wireless Communications
As part of the graduate research seminar series in Electrical Engineering department of FAST-NU, Lahore campus, Dr. S M Sajid gave a talk on “Optical Wireless Communications” on Saturday, 5th March, 2016 at 11:30 am in Old Auditorium. Since fall 2011, Dr. Sajid has been working as an Associate Professor of Electrical Engineering at FAST-NU Lahore and has successfully supervised the first ever doctoral thesis in the department along with a number of MS theses. He has extensive knowledge and experience in the field of Optical Communications.
“Optical Wireless Communications” is an evolving technology with applications ranging from infra-red operated remote controls (most sold devices) to inter-satellite high data rate laser based communications links. This brief talk presented the history, fundamentals and applications including the very important “Visible Light Communications”. It highlighted the various possibilities and advantages of utilizing optical wireless links and covered the important aspect of terrestrial building-to-building high data rate medium distance free space optics (FSO) links. The limitations of these links in particular atmospheric attenuation and turbulence induced fading, was also discussed. The talk clarified that the most serious deterrent to the wide scale adaptability of terrestrial FSO is the aerosol based scattering in particular fog attenuation. The second part of the talk touched upon the research in different aspects of Optical Wireless Communication systems including propagation modeling, channel modeling, coded-modulation techniques and the application of Network Information theory to optical wireless networks. Interesting results in the domain were discussed which challenged the commonly held misconceptions regarding wavelength selection to combat attenuation and building sway induced misalignment.