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Fabrication of advanced glass light pipes for solar concentrators
Author(s): Y. Dogan; M. Morrison; C. Hu; R. Atkins; M. Solmaz; C. K. Madsen
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Paper Abstract

New applications for light pipes include waveguiding solar concentrators. For practical applications, achieving high optical transmission is critical so low-absorption glass is preferred over other materials, and the fabrication approach must show promise for scalability and low manufacturing costs. We present results for fabricated fused silica light pipes using femtosecond laser irradiation followed by chemical etching. After compensating for Fresnel losses and averaging over incident angles (in air) from 0° to 25°, transmission efficiencies of 96% and higher were measured for light pipes up to 20mm in length and 1mm2 cross-sectional area. The feasibility of creating glass light pipes with advanced geometries such as angled facets, tapering of the cross-section along the length, and combiners with micron-scale precision is also demonstrated. Tapered light pipes with concentrating factors up to 7x were fabricated, as well as cascaded structures with 45°-angled facets to couple light from multiple lens array elements into a common light pipe.

Paper Details

Date Published: 16 October 2017
PDF: 6 pages
Proc. SPIE 10448, Optifab 2017, 104482G (16 October 2017); doi: 10.1117/12.2279849
Show Author Affiliations
Y. Dogan, Texas A&M Univ. (United States)
M. Morrison, Texas A&M Univ. (United States)
C. Hu, Texas A&M Univ. (United States)
R. Atkins, Texas A&M Univ. (United States)
M. Solmaz, Izmir Katip Celebi Univ. (Turkey)
C. K. Madsen, Texas A&M Univ. (United States)
Sunstrike Optics, LLC (United States)


Published in SPIE Proceedings Vol. 10448:
Optifab 2017
Julie L. Bentley; Sebastian Stoebenau, Editor(s)

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