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

被引：35

作者：

Chen, JC ^{[1
]}

Lo, CY ^{[1
]}

Huang, KY ^{[1
]}

Kao, FJ ^{[1
]}

Tu, SY ^{[1
]}

Huang, SL ^{[1
]}

机构：

[1] Natl Sun Yat Sen Univ, Inst Electroopt Engn, Kaohsiung 804, Taiwan

来源：

JOURNAL OF CRYSTAL GROWTH | 2005年 / 274卷 / 3-4期

关键词：

doping; optical microscopy; laser heated pedestal growth;

D O I：

10.1016/j.jcrysgro.2004.10.063

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

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 mum spatial resolution. The corresponding sensitivities for Cr3+ and Cr4+ fluorescence intensities are 1.6 x 10(17)/cm(3) and 7.5 x 10(15)/cm(3), respectively. The share of Cr4+ 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 Ca2+ 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 mum. In addition, stress-induced striations created near the fiber center disappear when the fiber diameter is smaller tharl 500 mum. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：522 / 529

页数：8

共 28 条

[1]

Angert N. B., 1988, Soviet Journal of Quantum Electronics, V18, P73, DOI 10.1070/QE1988v018n01ABEH010367

[2] Enhanced room-temperature emission in Cr4+ ions containing alumino-silicate glasses [J].

Batchelor, C ;

Chung, WJ ;

Shen, S ;

Jha, A .

APPLIED PHYSICS LETTERS, 2003, 82 (23) :4035-4037

[3]

Borodin N. I., 1990, Bulletin of the Academy of Sciences of the USSR, Physical Series, V54, P54

[4] Oxidation state and local coordination of chromium dopant in soda-lime-silicate and calcium-aluminate glasses [J].

Choi, YG ;

Kim, KH ;

Han, YS ;

Heo, J .

CHEMICAL PHYSICS LETTERS, 2000, 329 (5-6) :370-376

[5] 1.3-MU-M ND-YAG CRYSTAL FIBER AMPLIFIERS [J].

DAVIS, GM ;

YOKOHAMA, I ;

SUDO, S ;

KUBODERA, K .

IEEE PHOTONICS TECHNOLOGY LETTERS, 1991, 3 (05) :459-461

[6] 2-PHOTON LASER SCANNING FLUORESCENCE MICROSCOPY [J].

DENK, W ;

STRICKLER, JH ;

WEBB, WW .

SCIENCE, 1990, 248 (4951) :73-76

[7] The influence of active ion concentration and crystal parameters on pulsed Cr:YAG laser performance [J].

Diettrich, JC ;

McKinnie, IT ;

Warrington, DM .

OPTICS COMMUNICATIONS, 1999, 167 (1-6) :133-140

[8] Chromium-doped silica optical fibres: influence of the core composition on the Cr oxidation states and crystal field [J].

Felice, V ;

Dussardier, B ;

Jones, JK ;

Monnom, G ;

Ostrowsky, DB .

OPTICAL MATERIALS, 2001, 16 (1-2) :269-277

[9] Spectroscopy and crystal-field analysis for Cr(IV) in alumino-silicate glasses [J].

Feng, X ;

Tanabe, S .

OPTICAL MATERIALS, 2002, 20 (01) :63-72

[10] CONTINUOUS-WAVE MODE-LOCKED CR-4+-YAG LASER [J].

FRENCH, PMW ;

RIZVI, NH ;

TAYLOR, JR ;

SHESTAKOV, AV .

OPTICS LETTERS, 1993, 18 (01) :39-41

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