Experimental verification of spectral grating interference in multiplexed volume holograms employed as broadband dispersive elements for solar concentrators

G. B. Ingersoll, Di Lin, James R Leger

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

Using diverse bandgap photovoltaic cells can improve solar conversion efficiency, but these systems also require efficient dispersive optics to direct portions of the solar spectrum onto the appropriate optimized cells. We use an extended coupled-mode model to show how multiplexed volume gratings interact with one another reducing efficiency in the diffraction orders of interest as well as increasing stray light under certain conditions. We conducted experiments with multiplexed gratings in dichromated gelatin to verify our theory. This technique reveals effects that cannot be seen through superposition of single grating models, which suggests that multiplexed gratings must be treated simultaneously when designing such a system.

Original languageEnglish (US)
Title of host publicationHigh and Low Concentrator Systems for Solar Electric Applications VIII
DOIs
StatePublished - Nov 6 2013
EventHigh and Low Concentrator Systems for Solar Electric Applications VIII - San Diego, CA, United States
Duration: Aug 27 2013Aug 27 2013

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume8821
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceHigh and Low Concentrator Systems for Solar Electric Applications VIII
CountryUnited States
CitySan Diego, CA
Period8/27/138/27/13

Keywords

  • coupledmode theory
  • multiplexed volume holograms
  • solar concentration
  • volume Bragg gratings
  • volume holography

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