Accession Number : ADA180617

Title :   Chemical Stabilization of Laser Dyes.

Descriptive Note : Final rept. 1 Dec 84-28 Feb 87,

Corporate Author : COLORADO UNIV AT BOULDER DEPT OF CHEMISTRY

Personal Author(s) : Koch,Tad H.

Report Date : 07 MAY 1987

Pagination or Media Count : 9

Abstract : 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 (DABCO)inhibits this oligomerization. Keywords: Photochemistry; Lasers; dyes; stabilizers; oxygen; multiphoton; photon.

Descriptors :   *COUMARINS, *LASERS, *DYES, *DYE LASERS, ATTENUATION, DEGRADATION, DETERIORATION, OUTPUT, EMISSION, INTERFERENCE, STIMULATION(GENERAL), CHEMICALS, STABILIZATION, EXCITATION, INTENSITY, PHOTONS, POLYMERIZATION, PHOTOCHEMICAL REACTIONS, MATERIALS, YIELD, OXYGEN, SOLVENTS

Subject Categories : Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE