Comparative study on light-induced absorption between MgO:LiNbO{sub 3} and MgO:LiTaO{sub 3}

Journal Article · Thu Sep 15 04:00:00 EDT 2011 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3642959· OSTI ID:22038702

Enomoto, Satoshi; Ashihara, Satoshi ^[1]

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1. Department of Applied Physics, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei Tokyo 184-8588 (Japan)

A comparative study on the light-induced absorption was performed for lithium niobate and lithium tantalate crystals in which the antisite defects were eliminated by MgO doping. The induced absorption was measured in a spectral window ranging from visible to near infrared with a time resolution of 10 ns. Upon pulsed-light irradiation, a broad absorption peaking near 1250 nm was induced in MgO-doped lithium niobate. It was attributed to the small free polaron, an electron trapped at the regular Nb ion site. In contrast, such absorption in the near infrared originating from the free polaron was absent in MgO-doped lithium tantalates. The findings are highly relevant to the frequency conversion performances of high-power and pulsed lasers based on the current periodically-poled devices. The results also suggest guidelines for improving the crystal qualities.

• OSTI ID: 22038702
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 6 Vol. 110; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION
CRYSTALS
DOPED MATERIALS
ELECTRONS
INFRARED SPECTRA
IRRADIATION
LASER RADIATION
LITHIUM
LITHIUM COMPOUNDS
MAGNESIUM OXIDES
NIOBATES
NIOBIUM IONS
PERFORMANCE
POLARONS
RADIATION EFFECTS
TANTALATES
TIME RESOLUTION
TRAPPING
VISIBLE RADIATION