Optical switch fabricated by a thin film process
AssigneeFujitsu Limited
InventorKuo-Chuan Liu
Life of this patent
Estimating the term…
Abstract
An electro-optical switch is provided, that includes: a single mode optical waveguide having a thin ferroelectric oxide film for propagating a single mode of light; a coupler adjoining the single mode optical waveguide for coupling a part of the single mode of light from an optical fiber to the single mode optical waveguide; an electrically formed lens in the single mode optical waveguide for collimating the single mode of light from the coupler; and a switching module comprising another electrically formed lens in the single mode optical waveguide, for switching the single mode of light.
Claims15
A single mode optical switch comprising:
- a single mode optical planar wave guide, comprising a thin ferroelectric oxide film, for propagating a single mode of light;
- a coupler adjoining said single mode optical waveguide for coupling at least a portion of said single mode of light from an optical fiber to said single mode optical planar waveguide;
- a structure for creating a first electrically formed lens in said single mode optical planar waveguide for collimating said single mode of light from said coupler;
- and
- a switching module comprising a structure for creating an electrically formed prism in said single mode optical planar waveguide, for switching said single mode of light.
An optical switch comprising:
- a single mode optical waveguide, comprising a thin ferroelectric oxide film, for propagating a single mode of light;
- light coupling means for transferring at least a portion of said single mode of light from an optical fiber to said single mode optical waveguide;
- light collimation means for collimating said single mode of light in said single mode optical waveguide using a pair of electrodes;
- and an electrical pathway for connecting a top electrode of said pair of electrodes to an external voltage source.
Dependencies are inferred from the claim text.