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High Efficient Laser Operation of the High-Doped Nd:YAG Crystal Grown by Temperature Gradient Technology |
| MAO Yan-Li1,2;DENG Pei-Zhen1;ZHANG Ying-Hua1;GUO Ju-Pin1;GAN Fu-Xi1 |
| 1Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
2Department of Physics, Henan University, Kaifeng 475001 |
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| Cite this article: |
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MAO Yan-Li, DENG Pei-Zhen, ZHANG Ying-Hua et al 2002 Chin. Phys. Lett. 19 1293-1295 |
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Abstract We investigate the optical properties of Nd:YAG crystals grown by temperature gradient technology with different Nd-doping levels. The Nd concentrations used are 1.0at.%, 1.5at.%, 2.0at.%, 2.5at.%, and 3.0at.%, respectively. It is found that the absorption coefficients of Nd:YAG crystals increase with the increasing Nd concentrations. The absorption coefficient of 3.0at.% Nd:YAG is up to 22.1cm-1. The laser performance of these Nd:YAG crystals is compared with that of the traditional Nd:YAG (1.1at.% Nd) grown by the Czochralski (CZ) method. Although concentration quenching exists in highly doped Nd:YAG, 2.0at.% Nd:YAG shows excellent performance with the slope efficiency of 46.7%, which is higher than that (39%) of 1.1at.% Nd:YAG grown by the CZ method.
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| Keywords:
42.55.Nw
42.70.-a
78.55.Hx
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Published: 01 September 2002
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