Optical device
AssigneeNGK Insulators, Ltd.
InventorsOsamu Mitomi, Takenori Ichigi, Masatsugu Oshima, Jun Okumura, Kenji Aoki, Masataka Yamashita
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Abstract
An optical device comprises a core layer; a first clad layer, with the core layer being deposited on a part of surface of the first clad layer; a second clad layer, with the core layer being provided between the first clad layer and the second clad layer; a third clad layer deposited on the second clad, an electrode for heating, and a substrate having a heat-sink function. At least one of the core layer and the clad layers comprises a material having a positive refractive index variation coefficient. The third clad layer has a refractive index smaller than that of the second clad layer.
Claims14
An optical device comprising:
- a core layer;
- a first clad layer, with said core layer being deposited on a part of surface of said first clad layer;
- a second clad layer, with said core layer being provided between said first clad layer and said second clad layer;
- a third clad layer deposited on said second clad layer;
- and
- at least one electrode for applying a certain voltage or supplying a certain current;
- wherein at least one of said core layer, said first clad layer and said second clad layer comprises a material with a positive refractive index variation coefficient, and said third clad layer has a refractive index smaller than that of said second clad layer.
An optical device comprising:
- a core layer;
- a first clad layer, with said core layer being deposited on a part of surface of said first clad layer;
- a second clad layer, with said core layer being provided between said first clad layer and said second clad layer;
- a third clad layer deposited on said second clad layer;
- and
- at least one electrode for applying a certain voltage or supplying a certain current;
- wherein at least one of said core layer, said first clad layer and said second clad layer comprises a material with a negative refractive index variation coefficient, and said third clad layer has a refractive index smaller than that of said second clad layer.
An optical device comprising:
- a core layer;
- a first clad layer, with said core layer being deposited on a part of surface of said first clad layer;
- a second clad layer, with said core layer being provided between said first clad layer and said second clad layer;
- a third clad layer deposited on said second clad layer;
- and
- at least one electrode for applying a certain voltage or supplying a certain current;
- wherein said electrode is arranged so that said electrode crosses the central axis of said core layer making an acute angle with a light propagating through said core layer.
An optical device comprising:
- a core layer;
- a first clad layer, with said core layer being deposited on a part of surface of said first clad layer;
- a second clad layer, with said core layer being provided between said first clad layer and said second clad layer;
- a third clad layer deposited on said second clad layer;
- and
- at least one electrode for applying a certain voltage or supplying a certain current;
- wherein the length of said electrode in a direction perpendicular to the central axis of said core layer making an acute angle with a light propagating through said core layer is not more than times of the width of said core layer.
Dependencies are inferred from the claim text.