Growth of Sapphire Fibers with a CO Laser
Final rept. 1 May 1993-30 Apr 1994
UNIVERSITY OF SOUTH FLORIDA TAMPA DEPT OF PHYSICS
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The objective of this program was to explore ways to increase the growth rate of optical quality sapphire fibers produced by the Laser Heated Pedestal Growth LHPG technique. Prior to this program, the maximum rate at which this could be accomplished was 3-4 mmmin. When the latter rate was exceeded, the transmission of the fiber rapidly deteriorated. The cause of the degradation was thought to be the increasing disturbance by convection currents in the molten zone. To reduce the severity of the latter, we proposed to examine the use of a different wavelength of the laser heat source and the modification of the spatial profile of the laser beam to heat the molten zone more uniformly. In the standard implementation of LHPG a CO2 laser with output in the 9-10 micrometers region is used.
- Geology, Geochemistry and Mineralogy
- Lasers and Masers
- Radiofrequency Wave Propagation