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Proceedings Paper

Dye-triplet-state and singlet-oxygen quenching effects in solid state dye lasers
Author(s): Terence A. King; Mohammad Ahmad; Anthony Gorman; I. Hamblett; Mark D. Rahn
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Paper Abstract

The main photodegradation mechanisms of pyrromethene 567 are discussed, and the quantum efficiency of self-sensitized photo-oxidation, the predominant mechanism, was found to be 0.5% in aerated benzene-d6. Other degradation mechanisms do exist, but the high photostability of the dye in solid host media possibly implies that they are all diffusion controlled. Solid-state dye lasers based on pyrromethene 567 doped poly(methyl methacrylate) with an added singlet oxygen quencher 1,4-diazobicyclo [2,2,2] octane showed a lifetime of 550,000 pulses. A triplet quencher, perylene, provided no improvement. Singlet oxygen quenching is effective in the solid-state whereas triplet quenching is not, presumably due to the slower diffusion rate of dye molecules compared with oxygen.

Paper Details

Date Published: 14 April 2000
PDF: 9 pages
Proc. SPIE 3929, Solid State Lasers IX, (14 April 2000); doi: 10.1117/12.382759
Show Author Affiliations
Terence A. King, Univ. of Manchester (United Kingdom)
Mohammad Ahmad, Univ. of Manchester (United Kingdom)
Anthony Gorman, Univ. of Manchester (United Kingdom)
I. Hamblett, Univ. of Manchester (United Kingdom)
Mark D. Rahn, Univ. of Sheffield (United Kingdom)

Published in SPIE Proceedings Vol. 3929:
Solid State Lasers IX
Richard Scheps, Editor(s)

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