Lasing properties of 7-hydroxy-4-trifluoromethylcoumarin excited by an excimer laser

Journal Article · Wed Jan 01 04:00:00 EST 1986 · Sov. J. Quant. Electron. (Engl. Transl.); (United States)

DOI:https://doi.org/10.1070/QE1986v016n01ABEH005234· OSTI ID:5951014

Loboda, L I; Sokolova, I V; Il'chenko, A Y; Kopylova, T N

A study was made of the lasing properties of 7-OH-4-trifluoromethylcoumarin (F4MU) excited by an XeCl* excimer laser using various solvents (acetic acid, ethanol, water--ethanol mixtures, acidified water--ethanol mixtures, concentrated sulfuric acid). Theoretical calculations were made of the systems of electronic levels of F4MU and its protolytic forms. The absorption from the lower excited singlet level to the upper singlet levels and from the lower triplet level to the upper triplet levels was also calculated. It was found that in the case of F4MU the tuning range is wider than that of unfluorinated analogs (umbelliferone and 4-methylumbelliferone), and the lasing efficiency of the neutral and anionic forms is improved considerably. In addition, by using an excimer laser, lasing can be achieved in all protolytic forms of F4MU, so that the tuning range is increased compared with flashlamp excitation.

• Research Organization: Physicotechnical Institute, Tomsk
• OSTI ID: 5951014
• Journal Information: Sov. J. Quant. Electron. (Engl. Transl.); (United States), Journal Name: Sov. J. Quant. Electron. (Engl. Transl.); (United States) Vol. 16:1; ISSN SJQEA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
DYE LASERS
EFFICIENCY
ENERGY-LEVEL TRANSITIONS
EXCIMER LASERS
EXCITATION
FREQUENCY SELECTION
GAS LASERS
LASERS
LIQUID LASERS
TUNING