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Optics Letters

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  • Vol. 37, Iss. 13 — Jul. 1, 2012
  • pp: 2670–2672

120 watt continuous wave solar-pumped laser with a liquid light-guide lens and an Nd:YAG rod

T. H. Dinh, T. Ohkubo, T. Yabe, and H. Kuboyama  »View Author Affiliations


Optics Letters, Vol. 37, Issue 13, pp. 2670-2672 (2012)
http://dx.doi.org/10.1364/OL.37.002670


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Abstract

We propose a simple and efficient pumping approach for a high-power solar-pumped laser by using a liquid light-guide lens (LLGL) and a hybrid pumping cavity. A 2×2m Fresnel lens is used as a primary concentrator to collect natural sunlight; 120 W cw laser power and a 4.3% total slope efficiency are achieved with a 6-mm diameter Nd:YAG rod within a 14-mm diameter LLGL. The corresponded collection efficiency is 30.0W/m2, which is 1.5 times larger than the previous record. This result is unexpectedly better than that of Cr:Nd:YAG ceramics. It is because the scattering coefficient of Cr:Nd:YAG ceramics is 0.004cm1, which is 2 times larger than that of the Nd:YAG crystal, although both have similar saturation gains.

© 2012 Optical Society of America

OCIS Codes
(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

History
Original Manuscript: April 4, 2012
Revised Manuscript: May 14, 2012
Manuscript Accepted: May 18, 2012
Published: June 26, 2012

Citation
T. H. Dinh, T. Ohkubo, T. Yabe, and H. Kuboyama, "120 watt continuous wave solar-pumped laser with a liquid light-guide lens and an Nd:YAG rod," Opt. Lett. 37, 2670-2672 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-13-2670


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References

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