Optical module, manufacturing method thereof, and optical transmitter
An optical module including a first optical coupler; a second optical coupler; a first optical waveguide; a second optical waveguide; a first electrode provided on the first optical waveguide; a second electrode provided on the second optical waveguide; a short electrode shorter than the first and second electrodes and provided on the second optical waveguide; and a first high-frequency connector and a second high-frequency connector; wherein, the short electrode provided on the second optical waveguide is coupled to the second high-frequency connector; and the first electrode provided on the first optical waveguide is coupled to the first high-frequency connector.
1. An optical module comprising:
a first optical coupler including at least one input port and a first output port and a second output port;
a second optical coupler including at least a first input port and a second input port, and at least one output port;
a first optical waveguide, one end of which is coupled to the first output port and the other end of which is coupled to the first input port;
a second optical waveguide one end of which is coupled to the second output port and the other end of which is coupled to the second input port;
a first electrode provided on the first optical waveguide;
a second electrode provided on the second optical waveguide;
a short electrode shorter than the first and second electrodes and provided on the second optical waveguide; and
a first high-frequency connector and a second high-frequency connector;
wherein, the short electrode provided on the second optical waveguide is provided with a second high-frequency signal from the second high-frequency connector; and
the first electrode provided on the first optical waveguide is provided with a first high-frequency signal from the first high-frequency connector.
2. The optical module according to claim 1 , further comprising: a DC connector, wherein the second electrode provided on the second optical waveguide is coupled to the DC connector.
3. The optical module according to claim 1 , further comprising; another short electrode provided on the first optical waveguide.
4. The optical module according to claim 3 , further comprising: another DC connector, wherein the short electrode provided on the first optical waveguide is coupled to the another DC connector.
5. The optical module according to claim 1 , wherein the first electrode and the second electrode are a traveling-wave-type.
6. The optical module according to claim 1 , wherein the short electrode provided on the second waveguide is a lumped-constant type or a traveling-wave-type.
7. The optical module according to claim 1 , wherein a ratio of length of the short electrode to the first and second electrodes is within a range of 1/9 to 1/4 .
8. The optical module according to claim 1 , wherein the first high-frequency connector and the second high-frequency connector are provided in a package.
9. The optical module according to claim 1 further comprising: a laser device.