Investigation of a new laser active medium in the form of gadolinium scandium gallium garnet crystals activated with chromium and neodymium

Journal Article · Wed Aug 01 00:00:00 EDT 1984 · Sov. J. Quant. Electron. (Engl. Transl.); (United States)

DOI:https://doi.org/10.1070/QE1984v014n08ABEH005354· OSTI ID:6116426

Zharikov, E V; Laptev, V V; Ostroumov, V G; Privis, Y S; Smirnov, V A; Shcherbakov, I A

A general method is proposed for calculating the populations of excited acceptor states when they interact with energy donors under conditions of nonradiative losses in the acceptor subsystem. The method is suitable for dealing with continuous and pulsed pumping and no restrictions are imposed on the shape of the pump pulses. A study is made of the time dependence of the population of the upper active level /sup 4/F/sub 3//sub ///sub 2/ of Nd/sup 3 +/ in gadolinium scandium gallium garnet (GSGG) crystals containing chromium and neodymium. An allowance is made for energy migration in the donor subsystem in the case of low and high Nd/sup 3 +/ ion concentrations when, in the latter case, concentration self-quenching of Nd/sup 3 +/ is observed. A quantitative agreement is obtained between the calculated and experimental results and an increase in the population of the /sup 4/F/sub 3//sub ///sub 2/ level of Nd/sup 3 +/ because of sensitization of the Nd/sup 3 +/ luminescence by Cr/sup 3 +/ ions is found. The proposed calculation method is used to determine the optimal concentrations of Nd/sup 3 +/ in GSGG:Cr:Nd crystals under continuous and pulsed lasing conditions.

• Research Organization: Institute of General Physics, Academy of Sciences of the USSR, Moscow
• OSTI ID: 6116426
• Journal Information: Sov. J. Quant. Electron. (Engl. Transl.); (United States), Vol. 14:8
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
NEODYMIUM LASERS
EMISSION SPECTRA
ENERGY TRANSFER
CHROMIUM ADDITIONS
ENERGY LEVELS
GADOLINIUM COMPOUNDS
GALLIUM COMPOUNDS
GARNETS
NEODYMIUM ADDITIONS
POPULATION INVERSION
RADIATIONLESS DECAY
SCANDIUM COMPOUNDS
ALLOYS
CHROMIUM ALLOYS
DE-EXCITATION
ENERGY-LEVEL TRANSITIONS
LASERS
MINERALS
NEODYMIUM ALLOYS
OXYGEN COMPOUNDS
RARE EARTH ADDITIONS
RARE EARTH ALLOYS
RARE EARTH COMPOUNDS
SILICATES
SILICON COMPOUNDS
SOLID STATE LASERS
SPECTRA
TRANSITION ELEMENT COMPOUNDS
420300* - Engineering- Lasers- (-1989)