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Journal of Applied Physics / Volume 104 / Issue 8 / LASERS, OPTICS, AND OPTOELECTRONICS

J. Appl. Phys. 104, 083104 (2008); http://dx.doi.org/10.1063/1.2998981 (8 pages)

100 W-class solar pumped laser for sustainable magnesium-hydrogen energy cycle

T. Yabe1, B. Bagheri1, T. Ohkubo1, S. Uchida1, K. Yoshida1, T. Funatsu1, T. Oishi1, K. Daito1, M. Ishioka1, N. Yasunaga1, Y. Sato1, C. Baasandash1, Y. Okamoto2, and K. Yanagitani3

1Entropia Laser Initiative, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro, Tokyo 152-8552, Japan
2Okamoto Optics Works Co. Ltd., 8-34, Haramachi, Isogo-ku, Yokohama, Kanagawa 235-0008, Japan
3Konoshimakagaku Co. Ltd., 80 Kouda Takuma, Mitsutoyo, Kagawa 769-1103, Japan

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(Received 16 May 2008; accepted 25 August 2008; published online 21 October 2008)

A solar pumped laser system with 7%–9% slope efficiencies has been developed. A Fresnel lens (2×2 m, f = 2000 mm) is mounted on a two-axis sun tracker platform and focuses solar radiation toward laser cavity, which embraces Cr:Nd:yttrium aluminum garnet ceramic rod. The maximum emitted laser power is 80 W corresponding to maximum total area performance of 20 W/m2 for the Fresnel lens area. This solar laser system would be used as a section of power plant in a magnesium energy cycle as a cost-efficient solar energy converter. Using direct solar radiation into laser, 4.3% net conversion efficiency has been achieved.

© 2008 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. SOLAR PUMPED LASER SYSTEM
  3. HYBRID PUMPING CHAMBER
  4. IMPROVEMENTS OF HYBRID CAVITY
    1. Primary concentrator
    2. Secondary concentrator-funnel chamber
  5. LASER OSCILLATION EXPERIMENTS
  6. CONCLUSIONS

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KEYWORDS and PACS

Keywords

ceramics, chromium, laser beam applications, laser beams, lenses, neodymium, solar absorber-convertors, solar energy conversion, solid lasers, sustainable development

PACS

  • 42.79.Ek

    Solar collectors and concentrators

  • 42.62.-b

    Laser applications

  • 42.79.Bh

    Lenses, prisms and mirrors

  • 42.55.Rz

    Doped-insulator lasers and other solid state lasers

  • 42.60.Jf

    Beam characteristics: profile, intensity, and power; spatial pattern formation

  • 88.40.-j

    Solar energy

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.2998981

PUBLICATION DATA

ISSN

0021-8979 (print)  
1089-7550 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
    T. Yabe, S. Uchida, K. Ikuta, K. Yoshida, C. Baasandash, M. S. Mohamed, Y. Sakurai, Y. Ogata, M. Tsuji, Y. Mori, Y. Satoh, T. Ohkobo, M. Murahara, and A. Ikesue, Appl. Phys. Lett. 89, 261107 (2006)APPLAB000089000026261107000001.

    T. Yabe, M. S. Mohamed, S. Uchida, C. Baasandash, Y. Sato, M. Tsuji, and Y. Mori, J. Appl. Phys. 101, 123106 (2007)JAPIAU000101000012123106000001.

    T. Yabe, T. Ohkubo, S. Uchida, K. Yoshida, M. Nakatsuka, T. Funatsu, A. Mabuti, A. Oyama, K. Nakagawa, T. Oishi, K. Daito, B. Bagheri, Y. Nakayama, M. Yoshida, S. Motokoshi, Y. Sato, and C. Baasandash, Appl. Phys. Lett. 90, 261120 (2007)APPLAB000090000026261120000001.


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