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pro vyhledávání: '"Peter R. Hammond"'
Publikováno v:
Applied optics. 31(33)
The copper-laser-pumped dye laser system developed at the Lawrence Livermore National Laboratory (LLNL) is now capable of sustained, efficient, and reliable operation at total powers exceeding 2500 W and single amplifier chain powers exceeding 1300 W
Autor:
Diane Cooke, Peter R. Hammond
Publikováno v:
Applied Optics. 31:7095
Laser dye DCM in an ethylene glycol solution is a favored medium for converting the argon-ion 488- and 514-nm pump lines to tunable radiation in the 600-730-nm region. However, the dye precipitates from solution, is a powerful mutagen, and the glycol
Autor:
Peter R. Hammond, Ronald A. Henery
Publikováno v:
Journal of Heterocyclic Chemistry. 14:1109-1114
The pyrolysis of antipyrine 4dizaonium flouroborate gave an antipyrylazopyrazopyrazolone instead of the desired 4-fluoroantipyrine. This compound was formed by intermolecular and intramolecular coupling of the diazo compound at elevated temperatures.
Autor:
Peter R. Hammond
Publikováno v:
Journal of Photochemistry. 10:467-471
The title compound, the xanthene merocyanine related to rhodamine B and fluorescein, shows a slightly larger Stokes shift than either dye and lases at intermediate wavelengths. A weak response under nitrogen laser pumping is ascribed to strong excite
Autor:
Peter R. Hammond
Publikováno v:
Journal of Applied Physics. 57:4916-4930
As a continuous‐wave signal builds up in an energized laser dye solution, the lifetimes for the excited state of the molecules become shorter than their orientational relaxation time. Physical consequences of the phenomomenon are considered for two
Publikováno v:
Tetrahedron. 25:2549-2553
Chemical properties of the title compound are described briefly. Coloured solutions with aromatic hydrocarbons, dimethylaniline and polymethoxybenzenes are attributed to 1:1 interactions and equilibrium constants and enthalpies are reported. One, dee
Autor:
Peter R. Hammond
Publikováno v:
Applied Optics. 18:536
Inefficiencies in a laser dye resulting from excited state absorption are examined analytically with respect to its pump saturation behavior under conditions of small (extracted) signal gain. The spectrum of the lowest excited singlet state for such