Details of Grant 

EPSRC Reference:	GR/A10123/01
Title:	HIGH POWER, VISIBLE SOURCES BASED ON SEEDED FIBRE AMPL IFIERS AND PERIODICALLY POLED MATERIALS
Principal Investigator:	Popov, Dr S
Other Investigators:
Researcher Co-Investigators:
Project Partners:
Department:	Physics
Organisation:	Imperial College London
Scheme:	Advanced Fellowship (Pre-FEC)
Starts:	01 May 2001	Ends:	30 April 2006	Value (£):	244,208
EPSRC Research Topic Classifications:	Optical Devices & Subsystems
EPSRC Industrial Sector Classifications:
Related Grants:
Panel History:	Panel Date Panel Name Outcome 11 Jan 2001 IT Advanced Fellowship Interview Panel Deferred 07 Dec 2000 IT Fellowship Sift Panel Deferred
Summary on Grant Application Form
Erbium and Ytterbium amplifiers with average saturation power up to 50W are presently commercially available and can be turned into ideal sources for frequency conversion in periodically poled materials. Seeding of these amplifiers at selected wavelengths with directly gain-switched laser diodes or fibre lasers will provide a diversity in wavelengths, peak powers, repetition rates, pulse duration - factors required for the efficient up-frequency conversion in periodically poled materials.Seeding and synchronous seeding of Yb: and Er: fibre amplifiers in combination with single-pass quasi-phase-matched harmonic and sum frequency generation in periodically poled materials will allow generation of wavelengths from 350 to 770nm with up to 10 Watts of average power. This will allow development of a very compact, hands-free operation, and cost-effective fibre delivered Red-Green-Blue system for large screen projection systems with up to 2W per channel average power. Ultraviolet, watts range, sources will also be developed using periodically poled lithium tantalate and will find applications in offset printing and Bragg-grating industry, and semiconductor's lithography. At the same time the research will address the problem of reliability of periodically poled materials under high optical power exposure and utilise novel periodically poled materials to scale the visible output power up to 10-15 W.
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Organisation Website:	http://www.imperial.ac.uk