Grating for tuning a light source
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United States of America Patent
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Jul 22, 2014
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N/A
app pub date -
Mar 15, 2011
filing date -
Mar 15, 2010
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Abstract
A system includes a light source and a grating cube. The grating cube includes a transmission volume holographic grating positioned between two prisms. The transmission volume holographic grating diffracts part of a light source emission toward a reflective surface, producing diffracted light. At least some of the diffracted light is reflected off of the reflective surface, producing feedback light. The feedback light is fed back to the light source, thereby causing the light source emission to have the same wavelength as the feedback light.
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