Spectroscopic study of chromium-doped transparent calcium germanate glass-ceramics

被引：40

作者：

Sharonov, M. Yu. ^{[1
]}

Bykov, A. B.

Myint, T.

Petricevic, V.

Alfano, R. R.

机构：

[1] CUNY City Coll, Dept Phys, Inst Ultrafast Spect & Lasers, New York, NY 10031 USA

[2] CUNY, Grad Sch, New York, NY 10031 USA

来源：

OPTICS COMMUNICATIONS | 2007年 / 275卷 / 01期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/j.optcom.2007.02.058

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The optical properties of transparent chromium-doped glass-ceramics with the chemical composition similar to that of cunyite (Cr4+:Ca2GeO4) laser crystal were investigated. Room and low temperature absorption, excitation, fluorescence and Raman spectroscopy, as well as lifetime measurements were used to develop a model for the optical centers in the glass and nanocrystals. Parent (as quenched) glass does not exhibit any fluorescence; after the heat treatment Cr4+ fluorescence band appears at 1280 rim. Optical properties of nanocrystals formed in the glass-ceramics differ from those in the bulk single crystal Ca2GeO4. By comparison of Ca2GeO4 - like glass-ceramics with the Ca2GeO4 bulk single crystals and Mg2SiO4 - glass-ceramics we concluded that the nanocrystal phase is a modified Ca2GeO4 structure. Broadband fluorescence and a high quantum efficiency of new glass-ceramics make the new Cr-doped glassceramics promising medium for fiber lasers and amplifiers. Published by Elsevier B.V.

引用

页码：123 / 128

页数：6

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