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Details of Grant 

EPSRC Reference: GR/L10130/01
Title: PHOTOREFRACTIVE DAMAGE STUDIES IN PERIODICALLY POLED MATERIALS AND WAVEGUIDES
Principal Investigator: Eason, Professor RW
Other Investigators:
Kaczmarek, Professor M
Researcher Co-Investigators:
Project Partners:
Department: Sch of Physics and Astronomy
Organisation: University of Southampton
Scheme: Standard Research (Pre-FEC)
Starts: 08 March 1996 Ends: 07 March 1997 Value (£): 13,000
EPSRC Research Topic Classifications:
Optical Devices & Subsystems
EPSRC Industrial Sector Classifications:
Related Grants:
Panel History:  
Summary on Grant Application Form
1. Photorefraction has attracted much interest from numerous research groups during the past fifteen years. Whether it is beneficial or a nuisance depends on your goals, but in the case of periodically poled materials for quasi-phase-matching, photorefraction is undeniably a disadvantage. We intend to investigate why it is that materials that normally do not show photoreractive damage suddenly become susceptible to it once the material has periodic inversion of its c-axis direction. The work will be predominantly experimental, with associated computer modelling. Professor Feinberg is one of the worlds experts on photorefractive modelling and devices, and he will also bring to us his new optical technique (Science, Dec 22, 1995) for monitoring c-axis inversion in these materials.2. In wavelength devices, the power requirement for achieving efficient nonlinear behaviour is much reduced due to mode confinement. In materials such as LiNbO3 doped with Nd, lasing in the waveguide has recently been demonstrated. Unfortunately, photorefractive damage sets in at these high intensities. We intend to pursue studies of photorefractive compensation behaviour at high intensities in an attempt to eliminate photorefractive damage in these materials.
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Organisation Website: http://www.soton.ac.uk