Optical waveguides – Planar optical waveguide
Patent
1995-01-17
1996-09-10
Ngo, John
Optical waveguides
Planar optical waveguide
501 44, 501 33, 385142, 372 68, 372 39, G02B 610
Patent
active
055553427
ABSTRACT:
A planar waveguide and a process for making a planar waveguide is disclosed. The waveguide has a layer of doped host material formed on a substrate. The host material is a trivalent material such as a metal fluoride, wherein the metal is selected from the Group III B metals and the lanthanide series rare earth metals of the Mendeleevian Periodic Table. The dopant is a rare earth metal such as erbium. The waveguide has an emission spectrum with a bandwidth of about 60 nm for amplification of an optical signal at a wavelength of about 1.51 .mu.m to about 1.57 .mu.m. The waveguide is made by forming the layer of doped host material on a substrate. The film is formed by evaporating materials from two separate sources, one source for the dopant material and a separate source for the host material and forming a film of the evaporated materials on a substrate.
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patent: 5240885 (1993-08-01), Aiken et al.
patent: 5248890 (1993-06-01), Luth et al.
A. A. Kaminskii, Laser Crystals, Springer-Verlag (1974).
H. Nishihara, et al. Optical Integrated Circuits (1985).
R. G. Hunsperger Integrated Optics: Theory and Technology (1982).
Buchal Christoph J.
Siegrist Theo
Botos Richard J.
Lucent Technologies - Inc.
Ngo John
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