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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 27 — Dec. 19, 2011
  • pp: 26399–26405

Highly efficient solar-pumped Nd:YAG laser

Dawei Liang and Joana Almeida  »View Author Affiliations

Optics Express, Vol. 19, Issue 27, pp. 26399-26405 (2011)

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The recent progress in solar-pumped laser with Fresnel lens and Cr:Nd:YAG ceramic medium has revitalized solar laser researches, revealing a promising future for renewable reduction of magnesium from magnesium oxide. Here we show a big advance in solar laser collection efficiency by utilizing an economical Fresnel lens and a most widely used Nd:YAG single-crystal rod. The incoming solar radiation from the sun is focused by a 0.9 m diameter Fresnel lens. A dielectric totally internally reflecting secondary concentrator is employed to couple the concentrated solar radiation from the focal zone to a 4 mm diameter Nd:YAG rod within a conical pumping cavity. 12.3 W cw laser power is produced, corresponding to 19.3 W/m2 collection efficiency, which is 2.9 times larger than the previous results with Nd:YAG single-crystal medium. Record-high slope efficiency of 3.9% is also registered. Laser beam quality is considerably improved by pumping a 3 mm diameter Nd:YAG rod.

© 2011 OSA

OCIS Codes
(140.0140) Lasers and laser optics : Lasers and laser optics
(140.3530) Lasers and laser optics : Lasers, neodymium
(140.3580) Lasers and laser optics : Lasers, solid-state
(140.5560) Lasers and laser optics : Pumping
(350.6050) Other areas of optics : Solar energy

ToC Category:
Lasers and Laser Optics

Original Manuscript: October 3, 2011
Revised Manuscript: November 22, 2011
Manuscript Accepted: November 24, 2011
Published: December 12, 2011

Dawei Liang and Joana Almeida, "Highly efficient solar-pumped Nd:YAG laser," Opt. Express 19, 26399-26405 (2011)

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