http://fy.chalmers.se/%7Edelsing/LowTemp/Labbar/SQUIDlab-rev3.pdf WebAccording to the McCumber hypothesis, the cross-sectionsσaandσedo not depend on the populationsN1andN2. Therefore, we can deduce the relation, assuming the thermal state. TheMcCumber relation(or McCumber theory) refers to the effective cross-sections of absorption and emission of light in the physics ofsolid-state lasers[1][2].
Theory of Phonon-Terminated Optical Masers (1964) D. E.
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 … 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 shown in Fig.2 with thick curves. The emission cross-section is practically … Meer weergeven Web1 sep. 2009 · Usually, the excited state absorption cross section is obtained with a pump-probe technique [23].Quimby et al has developed a new method to obtain the excited state absorption cross section on the base of the McCumber’s theory [17].In this way, the absorption cross section from the lower level to the upper level can be obtained … light of god ministries
1.53 μm luminescent properties of Er3 - ScienceDirect
Web可见光窗口片. 红外紫外窗口片. 光学平晶. 楔形窗口片. 球罩窗口. 布鲁斯特窗口片 WebThe spectroscopic data are analyzed using a generalized McCumber theory. The peak stimulated emission cross section is 0.54 x 10/sup -20/ cm/sup 2/. This, together with … Webacteristics in the framework of the Stewart-McCumber theory [13, 14]. The Stewart-McCumber model describes the semi-classical regime of a small Josephson junction for … light of heart meaning