Diffraction grating for wavelength division multiplexing/demultiplexing devices
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United States of America Patent
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Sep 10, 2002
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N/A
app pub date -
Jun 5, 2000
filing date -
Jun 5, 2000
priority date (Note) -
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Abstract
An improved diffraction grating for wavelength division multiplexing/demultiplexing devices is disclosed. The improved diffraction grating has a glass substrate, a polymer grating layer located adjacent to the glass substrate, and a metal coating layer located adjacent to the polymer grating layer. The improvement comprises a polymer coating layer located adjacent to the metal coating layer, and a glass cover located adjacent to the polymer coating layer, wherein the polymer coating layer and the glass cover compensate for thermal characteristics associated with the polymer grating layer and the glass substrate, respectively.
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