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Details of Grant 

EPSRC Reference: GR/R85211/01
Title: IMPULSE:IMPlanted integrated saturable absorbers for ULtra-high SpEed optical transmission
Principal Investigator: Seeds, Professor AJ
Other Investigators:
Killey, Professor RI
Researcher Co-Investigators:
Project Partners:
Nortel
Department: Electronic and Electrical Engineering
Organisation: UCL
Scheme: Standard Research (Pre-FEC)
Starts: 15 September 2002 Ends: 14 March 2006 Value (£): 281,773
EPSRC Research Topic Classifications:
Lasers & Optics Optical Communications
EPSRC Industrial Sector Classifications:
Communications Electronics
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Summary on Grant Application Form
Describe the proposed research in about 200 words.The aim of the research is to integrate ultra-fast ion ion implanted saturable absorbers into semiconductor laser amplifiers and then integrate these semiconductor laser amplifier/implanted saturable absorbers (SLA/ISAs) into high channel rate (>40 Gb/s) dense wavelength division multiplex (DWDM) optical transmission systems. The systems objective is to use the SLA/ISAs to reduce the need for complex optical-electronic-optical signal regenerators to obtain low bit error rate operation at high channel data rates.Ion implantation normal to the junction planein specially fabricated SLA/ISAs will be used to obtain fast (<5ps) recovery time for the saturable absorbers, while integration of the absorber with the SLA leads to low absorber induced loss penalty. Device properties will be characterised using a 2ps resolution tuneable pump-probe system and by direct observation of 40 Gb/s pulse output.Key issues to be addressed include design of dispersion managed high bit-rate (40 Gb/s, 80 Gb/s and beyond) transmission systems using SLA/ISAs, determination of optimum SLA/ISA parameters, work on $LA/ISA integration technologies, device evaluation and high bit rate (>40 Gb/s) DWDM transmission evaluation carried out using recirculating loop systems provided by our industrial collaborators.
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