Web30 mei 2012 · A simple, physically consistent, and practical prescription for converting the luminescence spectra into absorption is presented and its relation to the so-called … 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 …
Human Identity. A Review Article - JSTOR
Web12 feb. 2009 · We present in this paper multi-watts CW operation of an Ytterbium-doped fiber laser directly emitting at wavelengths above 1150 nm for frequency-doubling in the yellow spectral range. A maximum output power of more than 15W has been obtained at 1154 nm in CW linearly polarized operation with a linewidth of less than 0.20 nm … 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 cyber monday 2016 monitor deals
Broadband laser materials and the McCumber relation
Web16 dec. 2002 · Specifically, when applied to broad optical transitions, the McCumber relation yields poor predictions of the emission cross-section spectral shape, the … Web16 dec. 2002 · The McCumber relation should be avoided for broad laser transitions, which includes most rare-earth transitions in many amorphous hosts. The approximate … WebWe present Emission and absorption cross sections of thulium doped calcium fluoride (Tm:CaF 2) in the visible to short wave infrared (SWIR) wavelength range for temperatures between 80 K and 300 K.For spectral regions of high and low absorption the McCumber relation and the Fuchtbauer-Ladenburg equation have been used to give reliable results. cyber monday 2016 sneakers