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Energy Express

Energy Express

  • Editor: Christian Seassal
  • Vol. 22, Iss. S6 — Oct. 20, 2014
  • pp: A1389–A1398

Total internal reflection-based planar waveguide solar concentrator with symmetric air prisms as couplers

Peng Xie, Huichuan Lin, Yong Liu, and Baojun Li  »View Author Affiliations

Optics Express, Vol. 22, Issue S6, pp. A1389-A1398 (2014)

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We present a waveguide coupling approach for planar waveguide solar concentrator. In this approach, total internal reflection (TIR)-based symmetric air prisms are used as couplers to increase the coupler reflectivity and to maximize the optical efficiency. The proposed concentrator consists of a line focusing cylindrical lens array over a planar waveguide. The TIR-based couplers are located at the focal line of each lens to couple the focused sunlight into the waveguide. The optical system was modeled and simulated with a commercial ray tracing software (Zemax). Results show that the system used with optimized TIR-based couplers can achieve 70% optical efficiency at 50 × geometrical concentration ratio, resulting in a flux concentration ratio of 35 without additional secondary concentrator. An acceptance angle of ± 7.5° is achieved in the x-z plane due to the use of cylindrical lens array as the primary concentrator.

© 2014 Optical Society of America

OCIS Codes
(220.1770) Optical design and fabrication : Concentrators
(230.5480) Optical devices : Prisms
(230.7400) Optical devices : Waveguides, slab
(350.6050) Other areas of optics : Solar energy

ToC Category:
Solar Concentrators

Original Manuscript: May 13, 2014
Revised Manuscript: June 19, 2014
Manuscript Accepted: August 11, 2014
Published: August 27, 2014

Peng Xie, Huichuan Lin, Yong Liu, and Baojun Li, "Total internal reflection-based planar waveguide solar concentrator with symmetric air prisms as couplers," Opt. Express 22, A1389-A1398 (2014)

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