Transparent Cr{sup 4+}-doped YAG ceramics for tunable lasers

Journal Article · Thu Feb 01 04:00:00 EST 1996 · Journal of the American Ceramic Society

DOI:https://doi.org/10.1111/j.1151-2916.1996.tb08154.x· OSTI ID:211714

Ikesue, Akio ^[1]; Yoshida, Kunio ^[2]; Kamata, Kiichiro ^[3]

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1. Krosaki Corp., Kitakyushu (Japan). Technical Research Center
2. Osaka Inst. of Tech. (Japan). Inst. of Laser Engineering
3. Nagaoka Univ. of Technology (Japan). Dept. of Materials Science and Technology

Transparent Cr{sup 4+}:YAG (Y{sub 3}Al{sub 5}O{sub 12}) ceramics doped with Ca and Mg as counterions and SiO{sub 2} as a sintering aid were fabricated by a solid-state reaction method using high-purity powders of Al{sub 2}O{sub 3}, Y{sub 2}O{sub 3}, and Cr{sub 2}O{sub 3}. The mixed powder compacts were sintered at 1,750 C for 10 h in oxygen, or 1,750 C for 10 h under vacuum, and then annealed at 1,400 C for 10 h in oxygen. Cr-doped YAG ceramics sintered in oxygen had a brown color and characteristic absorption by Cr{sup 4+} ions, whereas these YAG ceramics sintered under different conditions (vacuum + oxygen) had a green color and absorption at {approximately} 590 and 430 nm by Cr{sup 3+} ions. The absorption behavior of YAG ceramics sintered in oxygen was almost equivalent to that of Cr{sup 4+}:YAG single crystals fabricated by the Czochralski method.

• Sponsoring Organization: USDOE
• OSTI ID: 211714
• Journal Information: Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 2 Vol. 79; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
42 ENGINEERING
ABSORPTIVITY
ALUMINIUM OXIDES
ANNEALING
CALCIUM ADDITIONS
CHEMICAL REACTIONS
CHROMIUM ADDITIONS
DOPED MATERIALS
FERRITE GARNETS
MAGNESIUM ADDITIONS
MATERIALS
OXYGEN
POWDERS
SILICON ADDITIONS
SINTERING
SOLID STATE LASERS
YTTRIUM COMPOUNDS