Planar waveguide reflective diffraction grating

Details Planar waveguide reflective diffraction grating Planar waveguide reflective diffraction grating

2006-12-19

2006-12-19

Assaf, Fayez G. (Department: 2872)

Optical: systems and elements

Diffraction

From grating

C359S569000, C385S037000, C385S024000, C398S084000

Reexamination Certificate

active

07151635

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°.

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