Planar waveguide reflective diffraction grating
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United States of America Patent
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Dec 19, 2006
Grant Date -
Sep 29, 2005
app pub date -
Oct 25, 2004
filing date -
Mar 24, 2004
priority date (Note) -
Expired
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Abstract
The invention relates to a planar waveguide reflective diffraction grating for use in an optical device, such as a wavelength division multiplexer, providing an increased bandwidth over conventional planar waveguide reflection diffraction gratings while eliminating the polarization dependent loss (PDL) typically associated therewith. Accordingly, a low order (<3), high aspect ratio (>10) grating is provided with a very short side wall (less than the wavelength of the optical signal) for use with incident angles of less than 15.degree..
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