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US 2004/0001672 A1Published application
Optical waveguide device
AssigneeFujitsu Limited
InventorTakehito Tanaka
Life of this patent
Estimating the term…
Abstract
The attenuation from connectors to the interaction region of the light signal with the microwave can be reduced, and the bandwidth can be improved in an optical waveguide device, in which a space between strip lines on a ceramic substrate at one end of the strip lines connected to first and second input sections is adapted to be narrower than a space between the strip lines at the other end of the strip lines connected to first and second electric connectors.
Claims5
An optical waveguide device comprising:
- a piezoelectric substrate having an electro-optical effect, the piezoelectric substrate having thereon formed a first optical waveguide and a second optical waveguide that extend in parallel with each other, a first progressive wave electrode through which a first electrical signal progresses that interacts with a light signal propagating along the first optical waveguide to control the phase of the light signal, and a second progressive wave electrode through which a second electrical signal progresses that interacts with a light signal propagating along the second waveguide to control the phase of the light signal;
- the piezoelectric substrate having thereon arranged a first and a second input sections corresponding respectively to the first and the second progressive wave electrodes;
- and
- a ceramic substrate on which are formed strip lines connecting the first and second input sections with a first and a second electric connectors that supply the first and the second electrical signals corresponding thereto, respectively,
- wherein a space between the strip lines on the ceramic substrate at one end of the strip lines connected to the first and the second input sections is adapted to be narrower than a space between the strip lines at the other end of the strip lines connected to the first and the second electric connectors.
2 more elements
An optical waveguide device having:
- a piezoelectric substrate having an electro-optical effect;
- an input section optical waveguide formed on the piezoelectric substrate;
- an input-side waveguide branching section branching the input section optical waveguide into a first optical waveguide and a second optical waveguide that extend in parallel with each other;
- an output-side optical wave coupler section coupling the first optical waveguide and the second optical waveguide;
- a first progressive wave electrode through which a first electrical signal progresses that interacts with light propagating along the first optical waveguide to control the phase of the light;
- a second progressive wave electrode through which a second electrical signal progresses that interacts with light propagating along the second optical waveguide to control the phase of the light,
- the piezoelectric substrate having arranged on the same side a first and a second input sections corresponding respectively to the first and the second progressive wave electrodes;
- and
- a ceramic substrate on which are formed strip lines connecting the first and second input sections with a first and a second electric connectors that supply the first and the second electrical signals corresponding thereto, respectively,
- wherein a space between the strip lines on the ceramic substrate at one end of the strip lines connected to the first and the second input section is adapted to be narrower than a space between the strip lines at the other end connected to the first and the second electric connectors.
7 more elements
Dependencies are inferred from the claim text.