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US 5,847,865 AGranted
Waveguide optical amplifier
AssigneesRegents of the University of Minnesota, Honeywell Inc.
InventorsAnand Gopinath, Klein L. Johnson, Carol M. Ford, Randy J. Ramberg
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Abstract
A waveguide optical amplifier include a substrate and a guiding or active layer. The substrate has a substrate surface and a substrate index of refraction. The guiding layer is of Zirconium dioxide (ZrO.sub.2) and/or Alumina (Al.sub.2 O.sub.3) and is carried on a cladding layer over the substrate surface. The guiding layer has a guiding layer index of refraction which is higher than the cladding index of refraction. The Zirconium dioxide guiding layer is doped with rare earth materials.
Claims12
A waveguide optical amplifier, comprising:
- a substrate having a substrate surface and a substrate index of refraction;
- an amorphous, unetched active layer containing Zirconium dioxide (ZrO.sub.2) and doped with a rare earth material deposited on the substrate surface having an active layer index of refraction, wherein the active layer index of refraction is higher than the substrate index of refraction;
- and
- a low index of refraction ridge deposited on the active layer and patterned to thereby define an elongated region of optical confinement in the underlying amorphous active layer in a direction perpendicular to a direction of propagation.
1 more element
Dependencies are inferred from the claim text.