Title

Effect of Si-induced defects on 1 mu m absorption losses in laser-grade YAG ceramics

Authors

Authors

R. Gaume; Y. He; A. Markosyan;R. L. Byer

Comments

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Abbreviated Journal Title

J. Appl. Phys.

Keywords

YTTRIUM-ALUMINUM-GARNET; OPTICAL-ABSORPTION; COLOR-CENTERS; CRYSTALS; Y3AL5O12; SPECTROSCOPY; PERFORMANCE; LIGHT; Physics, Applied

Abstract

High sensitivity optical absorption at 1 mu m was measured in 40 undoped and Nd-doped Y3Al5O12 (YAG) transparent ceramics and single crystals using photothermal common-path interferometry. Concurrently, chemical trace analysis was performed on those samples by glow discharge mass-spectroscopy. Silicon and calcium were found to be the major impurities with concentrations up to 250wt. ppm. A univocal linear correlation between the Si content and the absorption loss at 1 mu m is revealed and a possible mechanism for the formation of Si-induced color centers based on a bound polaron model is discussed. Solutions to reduce this optical absorption in ceramics are also proposed. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4709756]

Journal Title

Journal of Applied Physics

Volume

111

Issue/Number

9

Publication Date

1-1-2012

Document Type

Article

Language

English

First Page

5

WOS Identifier

WOS:000304109900004

ISSN

0021-8979

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