Photostability of some pyrromethene laser dyes

Theodore G. Pavlopoulos

doi:10.1117/12.347669

4 May 1999 Photostability of some pyrromethene laser dyes

Theodore G. Pavlopoulos

Proceedings Volume 3613, Solid State Lasers VIII; (1999) https://doi.org/10.1117/12.347669
Event: Optoelectronics '99 - Integrated Optoelectronic Devices, 1999, San Jose, CA, United States

Abstract

Using flashlamp excitation, photostability data on 1,3,5,7,8-pentamethyl-, 1,2,3,5,6,7,8-hepta-methyl-, and 2,6-dipropyl-1,3,5,7,8-pentamethyl-, and 2,6-dinitro- 1,3,5,7,8-pentamethyl-pyrromethene- (P)-BF₂ complexes in the solvent 1,4-dioxane and the solvent mixtures 1,4- dioxane/heptane, 1,4-dioxane/cyclohexane, 1,4- dioxane/ethanol and 1,4-dioxane/hexanol, all ratio 1:4, were obtained. As reference laser dyes, the photostability of Rhodamine 6G in ethanol and the solvent mixture ethanol/hexanol ratio 1:4 and Rhodamine 560 in ethanol and the solvent mixtures ethanol/hexanol, ethanol/cyclohexane, and ethanol/heptane, all ratio, 1:4 were also obtained. Specifically, the laser output energy, (Delta) E (in joules) was recorded as a function of flashlamp excitation pulses, N. 2,6-dinitro-pentamethyl-P-BF₂ was very stable in the heptane mixture, and other P-BF₂ complexes were more stable in 1,4-dioxane. Rhodamine 6G was very stable photo chemically in hexanol. The role of oxygen in laser dye solutions is briefly reviewed.

Citation Download Citation

Theodore G. Pavlopoulos "Photostability of some pyrromethene laser dyes", Proc. SPIE 3613, Solid State Lasers VIII, (4 May 1999); https://doi.org/10.1117/12.347669

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