Waveguide-type optical device and optical switch
AssigneeFujitsu Limited
InventorsAkio Sugama, Masayuki Kato
Life of this patent
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Abstract
The waveguide-type optical device comprises a optical transmission element 12, an optical waveguide 20 optically connected to the optical transmission element, and a slab optical waveguide 30 formed of an electrooptic material and optically connected to the optical waveguide 20. In the waveguide-type optical device, a mode field width of the optical waveguide 20 has a value which is between a mode field width of the optical transmission element and a mode field width of the slab optical waveguide, whereby the connection loss between the optical transmission element 12, such as an optical fiber, etc. and the slab optical waveguide 30 can be small.
Claims15
A waveguide-type optical device comprising:
- an optical transmission element;
- an optical waveguide optically connected to the optical transmission element;
- and
- a slab optical waveguide formed of an electrooptic material and optically connected to the optical waveguide, the optical waveguide having a mode field width in a first direction vertical to a plane of the slab optical waveguide, whose value is between a mode field width of the optical transmission element and a mode field width of the slab optical waveguide.
An optical switch comprising:
- a plurality of input optical transmission elements;
- a first optical waveguide unit having a plurality of optical waveguides optically connected to said plurality of the input optical transmission elements, respectively;
- an optical deflection unit having a slab optical waveguide formed of an electrooptic material and optically connected to said plurality of the optical waveguides of the first optical waveguide unit;
- and
- a plurality of output optical transmission elements optically connected to the slab optical wave guide of the optical deflection unit,
- the optical waveguides of the first optical waveguide unit respectively having a mode field width in a direction vertical to a plane of the slab optical waveguide, whose value is between a mode field width of the input optical transmission elements and a mode field width of the slab optical waveguide.
Dependencies are inferred from the claim text.