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Method and apparatus using volume holographic wavelength blockers

  • US 7,986,407 B2
  • Filed: 12/03/2008
  • Issued: 07/26/2011
  • Est. Priority Date: 08/04/2008
  • Status: Active Grant
First Claim
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1. A volume holographic wavelength blocking filter assembly comprising:

  • a plurality of reflective volume holographic gratings, each reflective volume holographic grating havinga distinct slant angle;

    a distinct grating spacing,wherein the plurality of reflective volume holographic gratings produce a filtered Raman signal when disposed in a path of a Raman signal.

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