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Saint Petersburg, Russia

Fedorov P.P.,RAS A.M. Prokhorov General Physics Institute | Osiko V.V.,RAS A.M. Prokhorov General Physics Institute | Kuznetsov S.V.,RAS A.M. Prokhorov General Physics Institute | Garibin E.A.,INCROM Ltd.
Journal of Physics: Conference Series | Year: 2012

Because of the recent technology progress in the synthesis of fluoride ceramics by so-called hot-pressing method, several cooperating research groups have produced and meticulously described various polycrystalline ceramic samples with optical characteristics similar to the properties of corresponding single crystals. Their achievements made fluoride optical materials less expensive, more diverse and easier available for the use in solid-state lasers. The present review covers studies of fluoride ceramic materials and their properties in the last fifty years. It describes the most significant results obtained by leading scientific groups and indicates the most promising directions where research of fluoride laser ceramics should proceed in near future. Source


Lyapin A.A.,Ogarev Mordovian State University | Fedorov P.P.,RAS A.M. Prokhorov General Physics Institute | Garibin E.A.,INCROM Ltd. | Malov A.V.,Ogarev Mordovian State University | And 3 more authors.
Optical Materials | Year: 2013

The laser quality transparent CaF2:Tm fluoride ceramics has been prepared by hot forming. Comparative study of absorption and emission spectra of CaF2:Tm (4 mol.% TmF3) ceramic and single crystal samples demonstrated that these materials possess almost identical spectroscopic properties. Laser oscillations of CaF2:Tm ceramics were obtained at 1898 nm under diode pumping, with the slope efficiency of 5.5%. Also, the continuous-wave (CW) laser have been obtained for CaF2:Tm single crystal at 1890 nm pumped by a diode laser was demonstrated. © 2013 Elsevier B.V. All rights reserved. Source


Ashurov M.K.,Fonon State Research and Production Company | Boibobeva S.T.,Academy of Sciences of Uzbekistan | Nuritdinov I.,Academy of Sciences of Uzbekistan | Garibin E.A.,INCROM Ltd. | And 3 more authors.
Inorganic Materials | Year: 2016

We have studied the radiation resistance of CaF2:Yb3+ (3 mol % YbF3) laser ceramics and a single crystal of similar composition (3.6 mol % YbF3) exposed to gamma rays in a 60Co source. The unirradiated samples have been shown to be similar in spectral characteristics. Even though irradiation leads to identical valence changes, Yb3+↔Yb2+, in the single crystals and ceramics, it produces characteristic defect centers in the ceramic samples, which are responsible for the observed marked differences in the rate of valence changes and the annealing rate of radiation-induced defects. © 2016, Pleiades Publishing, Ltd. Source


Popov P.A.,Bryansk State University | Fedorov P.P.,RAS A.M. Prokhorov General Physics Institute | Garibin E.A.,INCROM Ltd. | Smirnov A.N.,INCROM Ltd. | And 2 more authors.
Inorganic Materials | Year: 2012

The thermal conductivity of Ca 1 - xHo xF 2 + x (x ≤ 0.03) optical ceramics has been studied experi mentally in the temperature range 50-300 K. With increasing holmium content, the thermal conductivity of the ceramics decreases, especially at low temperatures: from 10.2 to 2.3 W/(m K) at 300 K and from 250 to 4.5 W/(m K) at 50 K. © Pleiades Publishing, Ltd., 2012. Source


Moiseev N.V.,Bryansk State University | Popov P.A.,Bryansk State University | Fedorov P.P.,RAS A.M. Prokhorov General Physics Institute | Garibin E.A.,INCROM Ltd. | Reiterov V.M.,INCROM Ltd.
Inorganic Materials | Year: 2013

The heat capacity of single crystals of the Ca1-x Er x F2+x (x = 0.05, 0.10) and Ca0.95Yb 0.05F2.05 fluorite solid solutions was determined by adiabatic calorimetry in the temperature range 55-300 K. The results were used to obtain temperature dependences of the Debye characteristic temperature, entropy, and enthalpy for the solid solutions. © 2013 Pleiades Publishing, Ltd. Source

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