Optical waveguides – Directional optical modulation within an optical waveguide – Acousto-optic
Patent
1997-05-06
1998-08-04
Palmer, Phan T. H.
Optical waveguides
Directional optical modulation within an optical waveguide
Acousto-optic
385 11, 385 16, 385 20, 385 22, G02F 1335
Patent
active
057907200
ABSTRACT:
An acousto-optic silica optical circuit switch that selectively routes signals to one of two outputs includes a surface-acoustic-wave source and a coupler waveguide structure formed within silica glass. The waveguide structure includes a single mode input section connected to a multimode section connected to first and second single mode output sections. The first output section has a structure capable of accepting power from an optical signal propagating in a first transmission mode of the multimode section, and the second output section has a structure capable of accepting power from an optical signal propagating in a second transmission mode in said multimode section. In operation, RF excitation is selectively provided to the SAW source to selectively cause coupling of the first and second transmission modes in the multimode section. As a consequence, an optical signal launched in the input section propagates through the multimode section to the first output section in the first transmission mode of the waveguide structure, or alternatively, such launched optical signal is coupled to the second transmission mode in the multimode section such that its power is transferred to the second transmission mode to propagate into the second output section.
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Marcuse Dietrich
Presby Herman Melvin
Lucent Technologies - Inc.
Palmer Phan T. H.
Rudnick Robert E.
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