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Proceedings Paper

Effect of pump laser mode quality on the mode quality of the cw dye laser
Author(s): Timothy J. Johnston; Michael W. Sasnett
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Paper Abstract

Measurements with a beam propagation analyzer of the mode characteristics of the cw dye laser as a function of pump laser input power and mode quality, indicate that the thermal lens (of cylindrical form, induced by pump absorption in the flowing dye) controls the dye beam mode quality. At high pump power, if the dye laser resonator is adjusted for maximum output power, a degraded quality dye mode results, which is lower for lower quality pump modes. When the dye resonator is adjusted for maximum output power density (a direct output of the analyzer), typically a 12% power drop is sufficient to produce a nearly perfect beam quality (M2 < 1.1) and a +27% increase in beam power density for a multimode pumped dye laser.

Paper Details

Date Published: 22 April 1993
PDF: 9 pages
Proc. SPIE 1834, Laser Energy Distribution Profiles: Measurement and Applications, (22 April 1993); doi: 10.1117/12.143859
Show Author Affiliations
Timothy J. Johnston, Coherent Laser Group (United States)
Michael W. Sasnett, Coherent Instruments Div. (United States)

Published in SPIE Proceedings Vol. 1834:
Laser Energy Distribution Profiles: Measurement and Applications
James M. Darchuk, Editor(s)

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