Graduate Seminars

back Back to all Graduate Seminars

EE Graduate Seminar| Beyond LED Lighting

Start Date: August 27, 2017
End Date: August 27, 2017

By Professor Boon S. Ooi (KAUST)
 
LED solid-state lighting (SSL) has made tremendous progress over the past decades. Although LED lighting is known for its high energy efficiency, there are several limitations and challenges for the exiting LED lighting technology. Specifically, due to the intrinsic characteristic called ‘efficiency droop’, LEDs become less efficient and convert less of their electrical energy into light under high power operation. Integration of visible light communication capability in LED SSL, or Li-Fi, has been a topic of intense research after the idea was proposed in 2011. To date, a data rate of up to 100Mbps has been demonstrated. At KAUST, we are developing the next generation of SSL lighting using visible laser diodes. Laser diodes do not suffer efficiency droop at high current densities. This allows for the design of lamps using a single, small footprint, light-emitting chip operating at high current densities. Using a single chip reduces system costs compared with LEDs because the system uses less material per chip, requires fewer chips, and employs simplified optics and a simplified heat-sink. The chip area required for LED technologies will be significantly reduced using laser-based solid state lighting. This technology will also enable highly controllable beams in term of tunable throw distance, tunable color temperature and rendering index. In this talk, I will give a general overview of the field and focus my talk on the recent progress of laser-based SSL technology and GaN-based photonics integrated circuits. Applications of visible lasers to Gpbs visible light communications, underwater communication, indoor horticulture, etc, will also be discussed.
 
Biography: Boon S. Ooi holds a Professor of Electrical Engineering position at KAUST. His research is concerned with the study of semiconductor lasers, LEDs and photonic integrated circuits for applications in energy efficient solid-state lighting and visible light communications.

More Information:

For more info contact: Prof. Boon S. Ooi : email: boon.ooi@kaust.edu.sa
 
Date: Sunday 27th Aug 2017
Time:12:00 PM - 01:00 PM
Location: Building 9, Hall I Room 2322
Refreshments: Light Lunch will be available at 11:45 am