OPTICAL MODULE AND OPTICAL TRANSMITTER
First Claim
1. An optical module comprising:
- a waveguide substrate having an optical waveguide and multiple electrodes causing electronic signals to be applied to the optical waveguide;
a relay substrate disposed adjacently to the waveguide substrate; and
a termination substrate disposed adjacently to the waveguide substrate on a side opposite to the relay substrate and thereby, sandwiching the waveguide substrate therebetween, whereinthe electrodes respectively have a first wiring portion connected from the relay substrate through the waveguide substrate to the termination substrate and a second wiring portion extending from the first wiring portion and branching on the termination substrate,in the second wiring portion, one branched wiring portion has a capacitor and a termination resistor, and another branched wiring portion is extended through a bias resistor to a DC electrode on the relay substrate, andthe second wiring portion is divided into a first group extending in a first direction along the optical waveguide and a second group extending in a direction opposite to the first direction.
2 Assignments
0 Petitions
Accused Products
Abstract
An optical module includes a waveguide substrate having an optical waveguide and electrodes that apply electronic signals to the optical waveguide; a relay substrate disposed adjacently to the waveguide substrate; and a termination substrate disposed sandwiching the waveguide substrate with the relay substrate. The electrodes respectively have a first wiring portion connected from the relay substrate through the waveguide substrate to the termination substrate and a second wiring portion extending from the first wiring portion and branching on the termination substrate. In the second wiring portion, one branched wiring portion has a capacitor and a termination resistor, and another branched wiring portion extends through a bias resistor to a DC electrode on the relay substrate. The second wiring portion is divided into a first group extending in a first direction along the optical waveguide and a second group extending in a direction opposite to the first direction.
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Citations
21 Claims
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1. An optical module comprising:
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a waveguide substrate having an optical waveguide and multiple electrodes causing electronic signals to be applied to the optical waveguide; a relay substrate disposed adjacently to the waveguide substrate; and a termination substrate disposed adjacently to the waveguide substrate on a side opposite to the relay substrate and thereby, sandwiching the waveguide substrate therebetween, wherein the electrodes respectively have a first wiring portion connected from the relay substrate through the waveguide substrate to the termination substrate and a second wiring portion extending from the first wiring portion and branching on the termination substrate, in the second wiring portion, one branched wiring portion has a capacitor and a termination resistor, and another branched wiring portion is extended through a bias resistor to a DC electrode on the relay substrate, and the second wiring portion is divided into a first group extending in a first direction along the optical waveguide and a second group extending in a direction opposite to the first direction. - View Dependent Claims (3, 4, 5, 6, 7, 11, 12)
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2. An optical module comprising:
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an optical waveguide having a pair of parallel waveguides; a pair of electrodes disposed along the pair of parallel waveguides and to which electronic signals are applied; a waveguide substrate having the pair of optical waveguides and the pair of electrodes in plural; a relay substrate disposed adjacently to the waveguide substrate; and a termination substrate disposed adjacently to the waveguide substrate on a side opposite to the relay substrate and thereby, sandwiching the waveguide substrate therebetween, wherein the electrodes respectively have a first wiring portion extended from the relay substrate through the waveguide substrate to the termination substrate and a second wiring portion extending from the first wiring portion and branching on the termination substrate, in the second wiring portion, one branched wiring portion has a capacitor and a termination resistor, and another branched wiring portion is extended through a bias resistor to a DC electrode on the relay substrate, and the second wiring portion is divided into a first group extending in a first direction along the optical waveguide and a second group extending in a direction opposite to the first direction. - View Dependent Claims (15, 16, 17, 18, 19)
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8. An optical module comprising:
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a waveguide substrate having an optical waveguide and multiple electrodes that cause electronic signals to be applied to the optical waveguide; a relay substrate disposed adjacently to the waveguide substrate; and a termination substrate disposed adjacently to the waveguide substrate on a side opposite to the relay substrate and thereby, sandwiching the waveguide substrate therebetween, wherein in the second wiring portion, one branched wiring portion has a capacitor and a termination resistor, and another branched wiring portion is extended through a bias resistor and a carrier substrate to a DC electrode on the relay substrate, and the bias resistor is disposed at an inner layer wiring portion of the carrier substrate.
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9. An optical module comprising:
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a waveguide substrate having an optical waveguide and multiple electrodes that cause electronic signals to be applied to the optical waveguide; a relay substrate disposed adjacently to the waveguide substrate; and a termination substrate disposed adjacently to the waveguide substrate on a side opposite to the relay substrate and thereby, sandwiching the waveguide substrate therebetween, wherein in the second wiring portion, one branched wiring portion has a capacitor and a termination resistor, and another branched wiring portion is extended through a bias resistor and a carrier substrate to a DC electrode on the relay substrate, and the one branched wiring portion is led out to a back surface of the termination substrate through a via of the termination substrate, and the capacitor and the termination resistor are disposed on a back surface of the carrier substrate. - View Dependent Claims (10, 20, 21)
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13. An optical transmitter comprising:
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an optical module including; a waveguide substrate having an optical waveguide and multiple electrodes that cause electronic signals to be applied to the optical waveguide; a relay substrate disposed adjacently to the waveguide substrate; and a termination substrate disposed adjacently to the waveguide substrate on a side opposite to the relay substrate and thereby, sandwiching the waveguide substrate therebetween, wherein the electrodes respectively have a first wiring portion connected from the relay substrate through the waveguide substrate to the termination substrate and a second wiring portion extending from the first wiring portion and branching on the termination substrate, in the second wiring portion, one branched wiring portion has a capacitor and a termination resistor, wherein another branched wiring portion is extended through a bias resistor to a DC electrode on the relay substrate, and the second wiring portion is divided into a first group extending in a first direction along the optical waveguide and a second group extending in a direction opposite to the first direction; a data generating unit configured to supply as the electronic signals and to the multiple electrodes individually, data for transmission, and configured to supply a drive signal for modulation by the optical waveguide through the DC electrode; and a bias control circuit providing control such that polarization states of light of the optical waveguide are orthogonal to each other. - View Dependent Claims (14)
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Specification