SEDL / STP / STP1117-EB / STP26488S

IR Laser Beam Profiling Using Quenched Fluorescence

Kerr, NC
Loughborough University of Technology, Loughborough, Leicestershire

Clark, SE
Loughborough University of Technology, Loughborough, Leicestershire

Emmony, DC
Loughborough University of Technology, Loughborough, Leicestershire

Pages: 6    Published: Jan 1990

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Abstract

The construction and performance of a system for the spatial characterization of a CO² pulsed laser beam is described. Using thermally quenched fluorescence a direct imaging technique has been developed for single shot CO² laser pulse beam profiling. A CCD video camera and framestore interfaced to a PC computer are used to image the spatial intensity distribution produced by a CO² pulse incident upon a temperature dependent luminescent screen. The resolution is similar to much more expensive pyroelectric detector array techniques with all the advantages of two dimensional beam processing.