Apr. 2016

Article Contents

Chinese Optics> 2016> 9(2): 241-248.

ZHANG Jun-bin, HUANG Zhi-yun. Theoretical analysis on threshold of solar pumped solid state lasers[J]. Chinese Optics, 2016, 9(2): 241-248. doi: 10.3788/CO.20160902.0241

Citation:

ZHANG Jun-bin, HUANG Zhi-yun. Theoretical analysis on threshold of solar pumped solid state lasers[J].Chinese Optics, 2016, 9(2): 241-248.doi:10.3788/CO.20160902.0241

ZHANG Jun-bin, HUANG Zhi-yun. Theoretical analysis on threshold of solar pumped solid state lasers[J]. Chinese Optics, 2016, 9(2): 241-248. doi: 10.3788/CO.20160902.0241

Citation:

ZHANG Jun-bin, HUANG Zhi-yun. Theoretical analysis on threshold of solar pumped solid state lasers[J].Chinese Optics, 2016, 9(2): 241-248.doi:10.3788/CO.20160902.0241

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Theoretical analysis on threshold of solar pumped solid state lasers

doi:10.3788/CO.20160902.0241

ZHANG Jun-bin^{1, 2, 3,,},
HUANG Zhi-yun^{1, 2, 3,,}

1.
Institute of Laser and Optoelecrtronics Technology, College of Photonics and Electronic Engineering, Fujian Normal University, Fuzhou 350007, China;
2.
Fujian Provincial Key Laboratory for Photonics Technology, Fuzhou 350007, China;
3.
Key Laboratory of Optoelectronic Science and Technology for Medicine of Ministry of Education, Fuzhou 350007, China

Received Date:03 Nov 2015
Rev Recd Date:21 Dec 2015
Publish Date:25 Feb 2016

Abstract

Abstract

In order to select suitable solar pumped laser materials, a theoretical model is established based on the four-level rate equation, taking the solar spectrum into account. By this model, the pump intensity thresholds of Nd ³⁺:YAG, Nd ³⁺:glass, Nd:Cr:GSGG (Nd ³⁺:Cr ³⁺:Gd ₃Sc ₂Ga ₃O ₁₂), Cr ³⁺:BeAl ₂O ₄and Cr ³⁺:Nd ³⁺:YAG for the different pump schemes are analyzed. The results show that the pump intensity threshold of Nd ³⁺:YAG is 448 sun constant when it is side pumped by a single beam and is 224 sun constant when it is side pumped inside a ellipsoidal cavity, respectively, indicating that Nd ³⁺:YAG is suitable for solar pumped laser material. Due to the special structure of the ellipsoidal cavity, the pump intensity threshold is relatively low when it is side pumped inside a ellipsoidal cavity. The relationship between the pump intensity threshold and the diameter of the material is also analyzed. The model could be applied to select suitable materials which are easier to achieve laser output from the existing laser materials.
- solid state lasers,
- solar pumped,
- rate equation,
- theoretical analysis,
- pump intensity threshold