Inventors:
Andrew D. Sappey - Lakewood CO
Bernhard W. Bach - Boulder CO
Assignee:
Zolo Technologies, Inc. - Louisville CO
International Classification:
G02B 518
US Classification:
359571, 359569, 359572, 359574, 359576, 359130, 359900
Abstract:
A diffraction grating for use in multiplexing and demultiplexing optical signals in optical communication systems having reduced polarization sensitivity has a plurality of grooves including reflective step surfaces and transverse riser surfaces separated by a flat. The step surfaces have a reflective coating and the riser surfaces do not have a reflective coating. A method of making a reflective diffraction grating includes forming a plurality of grooves in a substrate, the grooves having a step surface for reflecting an incident beam, a transverse riser and a flat therebetween and providing a reflective coating on the steps and not on the risers.
