Two-step upconversion luminescence in Yb:Tb:YSGG crystal

被引：33

作者：

Noginov, MA

Venkateswarlu, P

Mahdi, M

机构：

[1] Ctr. for Nonlinear Opt. and Mat., Department of Physics, Alabama A and M University, Normal, AL 35762

来源：

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS | 1996年 / 13卷 / 04期

关键词：

D O I：

10.1364/JOSAB.13.000735

中图分类号：

O43 [光学];

学科分类号：

070207 [光学]; 0803 [光学工程];

摘要：

Multiline upconversion luminescence ranging from 375 to 635 nm was studied in Yb:Tb:YSGG crystal, a possible candidate for a tunable upconversion laser material. This luminescence was attributed to the transitions starting from the D-5(3) and D-5(4) excited levels of Tb. Two sequential steps in the upconversion were determined: at the first step Yb-Tb cooperative upconversion and cooperative absorption populate level D-5(4), and at the second step interaction of excited Yb and Tb (in the D-5(4) state) ions populates level D-5(3). At 500-mW Ti:sapphire pumping, the excited-state concentration of Tb ions exceeded 2% of Yb excited-state concentration. (C) 1996 Optical Society of America

引用

页码：735 / 741

页数：7

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