Chemical Stabilization of Laser Dyes.
Final rept. 1 Dec 84-28 Feb 87,
COLORADO UNIV AT BOULDER DEPT OF CHEMISTRY
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Coumarin laser dyes upon excitation degrade to produce products which absorb at the lasing wavelength. This results in attenuation of dye laser output through interference of stimulated emission. The roles of singlet oxygen and excitation intensity on dye degradation were explored. Singlet oxygen is formed but its reactions with the dye do not appear to be a major cause of dye laser output deterioration. High light intensity results in dye sensitized, solvent oligomerization to yield materials which interfere with dye stimulated emission. 1, 4-Diazabicyclo2,2,2octane DABCOinhibits this oligomerization. Keywords Photochemistry Lasers dyes stabilizers oxygen multiphoton photon.
- Lasers and Masers