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  Combinatorial Fluorescence Lifetime Measuring System for Developing Er-Doped Transparent Glass Ceramics

Todoroki, S.-i., & Inoue, S. (2004). Combinatorial Fluorescence Lifetime Measuring System for Developing Er-Doped Transparent Glass Ceramics. Appl. Surface Sci., 223(1-3), 39-43.

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Item Permalink: Version Permalink: http://pubman.nims.go.jp/pubman/item/escidoc:28369:5
Genre: Journal Article

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 Creators:
Todoroki, Shin-ichi1, Author              
Inoue, S.2, Author
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1Optronic Materials Center, Tsukuba, Japan, escidoc:29036              
2Advanced Materials Laboratory, National Institute for Materials Science, Namiki 1-1, Tsukuba, Ibaraki 305-0044, JAPAN , escidoc:persistent22              

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Free keywords: tellurite glass, erbium, fluorescence lifetime
 Abstract: Fluorescence lifetime of Er3+ was measured for F-doped tellurite glasses with parallel heat treatment under a temperature gradient atmosphere in order to find the annealing condition to make transparent glass ceramics in which Er3+ ions are located in the precipitated crystals. The preparation and annealing of the samples were performed in a vertical temperature gradient furnace, where molten glass was sucked into a pre-heated Pyrex glass tube. The annealing temperature range is between 350 degC and 800 degC. After the annealing treatment, time-resolved fluorescence emission of Er3+ (1.55um; excitation light source is 977nm) were measured sequentially along the tube. The lifetime of the emission was about 2.6 msec for as-prepared glass. We have found that the lifetime increased to 5.2 msec when the glass was annealed at 470 degC for 5 min and 550 degC for 5 min successively, although its transparency was lost. This increase implies that the Er3+ ions are embedded in fluorine-rich phase to bring about reduced non-radiative emission. We are now continuing to find the condition to get transparent glass ceramics.

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Language(s): eng - English
 Dates: 2003-09-232004-02-15
 Publication Status: Published in print
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 Rev. Method: Peer
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Title: Appl. Surface Sci.
Source Genre: Journal
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Pages: - Volume / Issue: 223 (1-3) Sequence Number: - Start / End Page: 39 - 43 Identifier: ISSN: 01694332