Investigation on high efficiency solar pumped Nd:YAG lasers
- Paper number
IAC-12,C3,3,14.p1,x14462
- Author
Prof.Dr. Zhao Changming, Beijing Institute of Technology, China
- Coauthor
Dr. Yang Suhui, Beijing Institute of Technology, China
- Coauthor
Dr. Zhang Haiyang, Beijing Institute of Technology, China
- Coauthor
Mrs. Lou Pingping, China
- Coauthor
Mr. Liu Cheng, China
- Coauthor
Mr. Xu Peng, Beijing Institute of Technology, China
- Year
2012
- Abstract
Abstract: Solar directly pumped solid state lasers are a promising approach for the laser-based Space Solar Power System (L-SSPS). Research is conducted on the solar pumped solid state lasers and related technologies, including the selection of laser medium suitable for solar pump, focusing optics suitable for large dimensional solar light collection, and the consideration for the dimension of secondary focusing optics. A theoretical model of the energy transformation from solar light to the laser output is established. Based on above analyses, experimental equipment is fabricated and tested. Economical large Fresnel lens is employed as the first focusing optics. Mirror-reflect and defusing-reflect corn concentrator are chosen as the secondary focusing optics, with the comparison of their performance. With φ8×115mm 1%at Nd:YAG rod and 1% output coupler, 8W laser output and 1.15% transformation efficiency from solar light to 1.06m laser is obtained. According to the theoretical analyses, output power and transform efficiency can be highly increased by change Nd:YAG by new laser medium with wider absorption band.
- Abstract document
- Manuscript document
(absent)