WebRelations described by Einstein connecting the rates of spontaneous emission, stimulated emission, and absorption of radiation by an atomic system in free … Web9 sep. 2009 · In Defence of the McCumber Relation for Erbium-Doped Silica and Other Laser Glasses Abstract: The reciprocity relation of McCumber which states that the …
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WebThe McCumber relation (or McCumber theory) refers to the effective cross-sections of absorption and emission of light in the physics of solid-state lasers [1] [2] . Contents 1 Definition 2 Gain 3 Idealized atoms 4 Deduction of the McCumber relation 4.1 Confirmation of the McCumber relation The McCumber relation (or McCumber theory) is a relationship between the effective cross-sections of absorption and emission of light in the physics of solid-state lasers. It is named after Dean McCumber, who proposed the relationship in 1964. Meer weergeven It is typical that the lasing properties of a medium are determined by the temperature and the population at the excited laser level, and are not sensitive to the method of excitation used to achieve it. In this case, … Meer weergeven Consider the set of active centers (fig.1.). Assume fast transition between sublevels within each level, and slow transition between … Meer weergeven In the case of an idealized two-level atom the detailed balance for the emission and absorption which preserves the Planck formula for the black-body radiation leads to equality of cross-section of absorption and emission. In the solid-state lasers the splitting of … Meer weergeven In 2006 the strong violation of McCumber relation was observed for Yb:Gd2SiO5 and reported in 3 independent journals. Typical behavior of the cross-sections reported is … Meer weergeven WebThis allowed the interpretation of results for Yb:Gd 2 SiO 5 by cites as an indication, that the effective cross-sections of broad-band composite materials have no need to satisfy the McCumber relation: the peak of at wavelength 950 nm corresponds to the gap of (See Fig.0.). However, a medium with such effective cross-sections would be good not only for … diamond point sequim wa map