US Patent 7333526 Coarse spectrometer with a grating
Patent 7333526 was granted and assigned to Intel on February, 2008 by the United States Patent and Trademark Office.
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A quasi-monochromatic light beam carrier for a particular telecommunication channel is likely to experience drift because of age, temperature, or other factors, and may cause the centroid wavelength of the carrier to shift. Temperature adjustments by wavelength lockers to compensate for drift on one channel may affect the performance of other channels. Embodiments of the present invention couple a quasi-monochromatic light beam through a substrate-based grating, diffract the light beam from the edge of the substrate to free space, and detect the light beam from free space at a position detector to determine the centroid wavelength based on a position of the light beam incident on the detector. The diffracted light beam may be reflected within the substrate a number of times prior to exiting the substrate towards the detector.
US Patent 07333526 Coarse spectrometer with a grating US Patent 7333526 Coarse spectrometer with a grating
US Patent 07333526 Coarse spectrometer with a grating
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