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Nonlinear Absorption of Submicrometer Grain‐Size Cobalt‐Doped Magnesium Aluminate Transparent Ceramics
Author(s) -
Wajler Anna,
Kozłowska Anna,
Nakielska Magdalena,
LeśniewskaMatys Kamila,
Sidorowicz Agata,
Podniesiński Dariusz,
Putyra Piotr
Publication year - 2014
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.12965
Subject(s) - materials science , spinel , ceramic , cobalt , absorption (acoustics) , grain size , doping , spark plasma sintering , analytical chemistry (journal) , saturable absorption , mineralogy , saturation (graph theory) , magnesium , metallurgy , composite material , wavelength , chemistry , optoelectronics , mathematics , chromatography , combinatorics , fiber laser
Transparent cobalt‐doped magnesium aluminate spinel ( Co : MgAl 2 O 4 ) ceramics with a submicrometer grain size were prepared by spark plasma sintering. For the first time, the nonlinear absorption of Co : MgAl 2 O 4 transparent ceramics was experimentally demonstrated. Both ground state absorption (σ GSA ) and excited state absorption (σ ESA ) were estimated using the solid‐state slow saturable absorber model based on absorption saturation measurements performed at 1.535 μm. σ GSA and σ ESA for 0.03 at.% Co : MgAl 2 O 4 were found to be 4.1 × 10 −19 cm 2 and 4.0 × 10 −20 cm 2 , respectively. In the case of 0.06 at.% Co : MgAl 2 O 4 ceramics, σ GSA = 2.6 × 10 −19 cm 2 and σ ESA = 5.3 × 10 −20 cm 2 were determined.