Tkachuk, A. M.Razurnova, I. K.Mirzaeva, A. A.Novikoi, G. E.Orlov, O. A.Malyshev, AndreyGapontsev4, V. P.2023-06-202023-06-2020010-8194-4040-X10.1117/12.420947https://hdl.handle.net/20.500.14352/61008©Spie-Int Soc Optical Engineering. ISSN: 0277-786X Laser Optics 2000 Conference (2000. San Petersburgo,Rusia) The work was partly supported by INTAS, Grant No JNTAS-97-787, and Russian Foundation for Basic Researches, Grants No 98-02-18 102 and 00-02-16637An influence of interionic cross relaxation processes (upconversion, selfquenching) on concentration and power dependences of the inverse population of ^4I_(11/2) and ^4I_(13/2) laser levels in YLF:Er crystals under CW laser-diode pumping were studied both theoretically and experimentally. Computer simulations were carried out taking into account not only pair interaction but also the multi-ion interaction in the whole system. Optimal Er concentration for 3 - µm CW lasing was estimated as 10 - 15%.engbook parthttp://dx.doi.org/10.1117/12.420947https://www.spiedigitallibrary.orgopen access538.9LuminescenceFísica de materialesFísica del estado sólido2211 Física del Estado Sólido