How the ytterbium concentration affects the population inversion of erbium in phosphate laser glasses

Асеев В.А., Жукова М.Н., Златов А.С., Никоноров Н.В., Пржевуский А.К., Федоров Ю.К. Влияние концентрации иттербия на инверсию населенности эрбия в фосфатных лазерных стеклах // Оптический журнал. 2007. Т. 74. № 11. С. 58–62.

Aseev V.A., Zhukova M.N., Zlatov A.S., Nikonorov N.V., Przhevuskiy A.K., Fedorov Yu.K. How the ytterbium concentration affects the population inversion of erbium in phosphate laser glasses [in Russian] // Opticheskii Zhurnal. 2007. V. 74. № 11. P. 58–62.  

V. A. Aseev, M. N. Zhukova, A. S. Zlatov, N. V. Nikonorov, A. K. Przhevuskiĭ, and Yu. K. Fedorov, "How the ytterbium concentration affects the population inversion of erbium in phosphate laser glasses," Journal of Optical Technology. 74 (11), 769-772 (2007). https://doi.org/10.1364/JOT.74.000769

The population of the metastable level of erbium in ytterbium-erbium phosphate glasses has been measured as a function of the concentration of ytterbium ions and the power of the laser pumping. The ytterbium concentration was varied from 0 to a limiting value of 52,4x10²⁰ сm^-3. It is established that increasing the concentration of ytterbium ions causes the population inversion of erbium to increase.