Fluorescence mapping of oxidation states of Cr ions in YAG crystal fibers

Jian Cheng Chen; Chia Yao Lo; Kuang Yao Huang; Fu Jen Kao; Shih Yu Tu; Sheng Lung Huang

doi:10.1016/j.jcrysgro.2004.10.063

Fluorescence mapping of oxidation states of Cr ions in YAG crystal fibers

Jian Cheng Chen, Chia Yao Lo, Kuang Yao Huang, Fu Jen Kao, Shih Yu Tu, Sheng Lung Huang^*

^*Corresponding author for this work

Institute of Biophotonics

Research output: Contribution to journal › Article › peer-review

39 Scopus citations

Abstract

We have demonstrated the use of laser scanning confocal microscope for mapping the refractive index as well as Cr³⁺ and Cr⁴⁺ fluorescence in Cr:YAG crystal fibers with 1 μm spatial resolution. The corresponding sensitivities for Cr³⁺ and Cr⁴⁺ fluorescence intensities are 1.6×10¹⁷/cm³ and 7.5×10¹⁵/cm³, respectively. The share of Cr ⁴⁺ ions in the total Cr concentration is found to be proportional to the ratio of Ca to Cr concentrations. However, only less than 1% of the Ca ²⁺ ions become active in charge compensation. The concentration of Cr⁴⁺ ions is higher near the center of the crystal fiber when the core diameter is less than 300 μm. In addition, stress-induced striations created near the fiber center disappear when the fiber diameter is smaller than 500 μm.

Original language	English
Pages (from-to)	522-529
Number of pages	8
Journal	Journal of Crystal Growth
Volume	274
Issue number	3-4
DOIs	https://doi.org/10.1016/j.jcrysgro.2004.10.063
State	Published - 1 Feb 2005

Keywords

A1. Doping
A1. Optical microscopy
A2. Laser heated pedestal growth

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10.1016/j.jcrysgro.2004.10.063

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@article{96a0b361645c48868eb49c5da537882c,

title = "Fluorescence mapping of oxidation states of Cr ions in YAG crystal fibers",

abstract = "We have demonstrated the use of laser scanning confocal microscope for mapping the refractive index as well as Cr3+ and Cr4+ fluorescence in Cr:YAG crystal fibers with 1 μm spatial resolution. The corresponding sensitivities for Cr3+ and Cr4+ fluorescence intensities are 1.6×1017/cm3 and 7.5×1015/cm3, respectively. The share of Cr 4+ ions in the total Cr concentration is found to be proportional to the ratio of Ca to Cr concentrations. However, only less than 1% of the Ca 2+ ions become active in charge compensation. The concentration of Cr4+ ions is higher near the center of the crystal fiber when the core diameter is less than 300 μm. In addition, stress-induced striations created near the fiber center disappear when the fiber diameter is smaller than 500 μm.",

keywords = "A1. Doping, A1. Optical microscopy, A2. Laser heated pedestal growth",

author = "Chen, {Jian Cheng} and Lo, {Chia Yao} and Huang, {Kuang Yao} and Kao, {Fu Jen} and Tu, {Shih Yu} and Huang, {Sheng Lung}",

note = "Funding Information: The authors appreciate B. Chiang for composition analysis in EPMA measurement. This work was supported by the Ministry of Education Program for Promoting Academic Excellence of Universities under grant number 91-E-FA08-1-4 and National Science Council of Taiwan under Grant no: NSC-90-2215-E-110-027 and NSC 90-2112-M-110. ",

year = "2005",

month = feb,

day = "1",

doi = "10.1016/j.jcrysgro.2004.10.063",

language = "English",

volume = "274",

pages = "522--529",

journal = "Journal of Crystal Growth",

issn = "0022-0248",

publisher = "Elsevier B.V.",

number = "3-4",

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TY - JOUR

T1 - Fluorescence mapping of oxidation states of Cr ions in YAG crystal fibers

AU - Chen, Jian Cheng

AU - Lo, Chia Yao

AU - Huang, Kuang Yao

AU - Kao, Fu Jen

AU - Tu, Shih Yu

AU - Huang, Sheng Lung

N1 - Funding Information: The authors appreciate B. Chiang for composition analysis in EPMA measurement. This work was supported by the Ministry of Education Program for Promoting Academic Excellence of Universities under grant number 91-E-FA08-1-4 and National Science Council of Taiwan under Grant no: NSC-90-2215-E-110-027 and NSC 90-2112-M-110.

PY - 2005/2/1

Y1 - 2005/2/1

N2 - We have demonstrated the use of laser scanning confocal microscope for mapping the refractive index as well as Cr3+ and Cr4+ fluorescence in Cr:YAG crystal fibers with 1 μm spatial resolution. The corresponding sensitivities for Cr3+ and Cr4+ fluorescence intensities are 1.6×1017/cm3 and 7.5×1015/cm3, respectively. The share of Cr 4+ ions in the total Cr concentration is found to be proportional to the ratio of Ca to Cr concentrations. However, only less than 1% of the Ca 2+ ions become active in charge compensation. The concentration of Cr4+ ions is higher near the center of the crystal fiber when the core diameter is less than 300 μm. In addition, stress-induced striations created near the fiber center disappear when the fiber diameter is smaller than 500 μm.

AB - We have demonstrated the use of laser scanning confocal microscope for mapping the refractive index as well as Cr3+ and Cr4+ fluorescence in Cr:YAG crystal fibers with 1 μm spatial resolution. The corresponding sensitivities for Cr3+ and Cr4+ fluorescence intensities are 1.6×1017/cm3 and 7.5×1015/cm3, respectively. The share of Cr 4+ ions in the total Cr concentration is found to be proportional to the ratio of Ca to Cr concentrations. However, only less than 1% of the Ca 2+ ions become active in charge compensation. The concentration of Cr4+ ions is higher near the center of the crystal fiber when the core diameter is less than 300 μm. In addition, stress-induced striations created near the fiber center disappear when the fiber diameter is smaller than 500 μm.

KW - A1. Doping

KW - A1. Optical microscopy

KW - A2. Laser heated pedestal growth

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U2 - 10.1016/j.jcrysgro.2004.10.063

DO - 10.1016/j.jcrysgro.2004.10.063

M3 - Article

AN - SCOPUS:12244262292

SN - 0022-0248

VL - 274

SP - 522

EP - 529

JO - Journal of Crystal Growth

JF - Journal of Crystal Growth

IS - 3-4

ER -

Fluorescence mapping of oxidation states of Cr ions in YAG crystal fibers

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Keywords

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