Efficiency of absorption of light from a xenon pump lamp in neodymium glass

A calculation was performed on the basis of the absorption spectra of Nd³⁺ in commercial glasses and in modeled matrices. This made it possible to compare the energy absorbed in the active element, the energy converted into stimulated radiation, and the heat energy losses as a function of the thickness of the absorbing layer of glass. The calculation was made taking into account the spectral distribution of the energy of the pump lamp radiation. A comparison was made of the role played by individual parts of the Nd³⁺ absorption spectrum in the process of the assimilation of the pump light by the energy activator. An estimate was made of the energy of the heat losses due to nonactive absorption by the antisolarizers and the matrix in commercial glasses GLS22, GLS32, and GLS34. Dependences making it possible to optimize the spectral position of the absorption edge of a filter, cutting off the ineffective radiation from the pump lamp, were obtained.