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Details of Grant 

EPSRC Reference: EP/C513622/1
Title: Modulation Dynamics if Quantum Dot Laser Diodes
Principal Investigator: Hogg, Professor RA
Other Investigators:
Researcher Co-Investigators:
Project Partners:
Bookham Technology Plc
Department: Electronic and Electrical Engineering
Organisation: University of Sheffield
Scheme: First Grant Scheme Pre-FEC
Starts: 01 December 2004 Ends: 31 May 2008 Value (£): 103,600
EPSRC Research Topic Classifications:
Materials Characterisation Materials Synthesis & Growth
Optical Communications Optoelect. Devices & Circuits
EPSRC Industrial Sector Classifications:
Electronics
Related Grants:
Panel History:  
Summary on Grant Application Form
Optical communications networks are required to work at ever increasing data rates. There is therefore a requirement for the engineering of inexpensive transmitter elements for such networks. Quantum dot (QD),laser diodes exhibit many properties which indicate that temperature insensitive, high performance, directly modulated laser diodes may be realised, leading to fibre optic transmitter modules of reduced cos and enhanced functionality. It has been predicted that QDs will replace quantum wells as the active element for telecomms lasers within 5 years. The proposed research aims to study the modulation dynamics of these QD laser diode structures with a view to their possible application of these devices in fibreoptic communication systems. The modulation dynamics are expected to be significantly different from conventional devices. providing insight into many aspects of low dimensional semiconductor physics. Furthermore, the research aims to study the prospect of engineering chirp in QDLDs (increasing the distance an optical signal can be transmitted over fibre-optic cable), and investigating novel modulation schemes involving switching the wavelength of the lasing state.
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Organisation Website: http://www.shef.ac.uk