Journal
OPTICAL MATERIALS
Volume 31, Issue 1, Pages 6-17Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optmat.2007.12.014
Keywords
Nd : YAG; laser ceramics; solid-state reaction; microstructure; properties
Categories
Funding
- Key Basic Research Project of Science and Technology of Shanghai [07DJ14001]
- Applied Basic Research Programs of Science and Technology Commission Foundation of Shanghai [06DZ11417]
- Fund of National Engineering Research Center for Optoelectronic Crystalline Materials [2005DC105003]
Ask authors/readers for more resources
Highly transparent 1.0 at% Nd:YAG laser ceramics were fabricated by solid-state reaction and vacuum sintering. The densification, the microstructure evolution, the optical, the mechnical and the thermal properties of the Nd:YAG ceramics were investigated. Fully dense Nd:YAG ceramic with average grain size of similar to 15 mu m was obtained by sintering at 1720 degrees C for 30 h. The grain boundary was clean and no secondary phase was observed. The in-line transmittance was 82.5% at 1064 nm. The absorption coefficients at 808 nm and 1064 nm were 4.52 cm(-1) and 0.16 cm(-1), respectively. The fluorescence spectrum for Nd:YAG ceramic was almost identical with single crystal and the fluorescent lifetime was 257 mu s. With 341 mW of maximum absorbed pump power, laser output of 26 mW has been obtained with an oscillation threshold and a slope efficiency of 100 mW and 11.8%. The Vicker's hardness, Young's modulus, bending strength, fracture toughness values were 12.5 GPa, 221 GPa, 229 MPa and 2.21 MPa m(1/2), respectively. The thermal conductivity at room temperature was 9.7 W/m K and the average linear thermal expansion coefficient from 30 to 1000 degrees C was 8.713 x 10(-6) K. (c) 2008 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available