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13 results on '"Yanagitani, Takakimi"'

2. Spectroscopic and stimulated emission characteristics of N[d.sup.3+] in transparent [Y.sub.2][O.sub.3] ceramics

Author

Kumar, G.A., Jianren Lu, Kaminskiii, Alexander A., Ueda, Ken-Ichi, Yagi, Hideki, and Yanagitani, Takakimi

Subjects
Neodymium -- Optical properties, Grain boundaries -- Analysis, Solid-state lasers -- Design and construction, Business, Computers, Electronics, Electronics and electrical industries
Abstract

The synthesis, spectroscopic studies and laser oscillation experiments conducted on N[d.sup.3+]-doped [Y.sub.2][O.sub.3] ceramic prepared by the vacuum sintering technique, is reported. Results show that the quality of the kind of Nd:[Y.sub.2][O.sub.3] ceramic is sufficient for use as a highly efficient laser media.

Published
2006

6. Highly efficient CW Nd:Y2O3 ceramic laser

Author

Lu, Jianren, primary, Lu, Junhua, additional, Murai, T., additional, Takaichi, K., additional, Uematsu, T., additional, Ueda, Ken-ichi, additional, Yagi, Hideki, additional, Yanagitani, Takakimi, additional, and Kaminskii, Alexander A., additional

Published
2002
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7. Highly Efficient Nd:Y3Al5O12 Ceramic Laser

Author

Jianren Lu, Jianren Lu, primary, Mahendra Prabhu, Mahendra Prabhu, additional, Jie Song, Jie Song, additional, Cheng Li, Cheng Li, additional, Jianqiu Xu, Jianqiu Xu, additional, Ken-ichi Ueda, Ken-ichi Ueda, additional, Hideki Yagi, Hideki Yagi, additional, Takakimi Yanagitani, Takakimi Yanagitani, additional, and Alexander A. Kaminskii, Alexander A. Kaminskii, additional

Published
2001
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9. High-Power Nd:Y3Al5O12 Ceramic Laser

Author

Jianren Lu, Jianren Lu, primary, Jie Song, Jie Song, additional, Mahendra Prabhu, Mahendra Prabhu, additional, Jianqiu Xu, Jianqiu Xu, additional, Ken-ichi Ueda, Ken-ichi Ueda, additional, Hideki Yagi, Hideki Yagi, additional, Takakimi Yanagitani, Takakimi Yanagitani, additional, and Alexis Kudryashov, Alexis Kudryashov, additional

Published
2000
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11. Spectroscopic and Stimulated Emission Characteristics of Nd3+ in Transparent Y2O3 Ceramics.

Author

Kumar, O. A., Jianren Lu, Kaminskii, Alexander A., Ken-Ichi Ueda, Yagi, Hideki, and Yanagitani, Takakimi

Subjects
RAW materials, NANOCRYSTALS, CERAMIC materials, CRYSTAL grain boundaries, ABSORPTION spectra, SPECTRUM analysis
Abstract

Nd:Y2O3 ceramic materials have been synthesized using the vacuum sintering technique with the raw materials prepared by the nanocrystalline methods. The TEM measurements reveal the excellent optical quality of the ceramic with low pore volume and narrow grain boundary. The radiative spectral properties of Nd:Y2Oa ceramic have been evaluated by fitting the Judd-Ofelt model with the absorption and emission data. Individual Stark levels for 2s+1LJ manifolds are obtained from the absorption and fluorescence spectra and are analyzed to identify the stimulated emission channels possible in the Nd:Y2O3 ceramic. Laser performance studies reveal two stimulated emission channels at 1074.6- and 1078.6-nm wavelengths with stimulated emission cross sections of 7.63 × 10-20 and 6.35 × 10-20 cm². With 1.5 at % Nd:Y2O3 ceramic acting as a laser medium, we obtained a slope efficiency of 32% with 160-mW output power and pump threshold of 200 mW at 1078.6 nm. [ABSTRACT FROM AUTHOR]

Published
2006
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13. High-Power Nd:Y3Al5O12Ceramic Laser

Author

Jianren Lu, Jianren Lu, Jie Song, Jie Song, Mahendra Prabhu, Mahendra Prabhu, Jianqiu Xu, Jianqiu Xu, Ken-ichi Ueda, Ken-ichi Ueda, Hideki Yagi, Hideki Yagi, Takakimi Yanagitani, Takakimi Yanagitani, and Alexis Kudryashov, Alexis Kudryashov

Abstract

High power CW (continuous wave) polycrystalline Nd:Y3Al5O12(Nd:YAG) ceramic rod laser was demonstrated for the first time. The maximum output power of 31 W with a 18.8% slope efficiency was obtained at 1064 nm using 214.5 W/808 nm laser diode pumping.

Published
2000
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