Patent ID: 11947237
Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 3:
4. The semiconductor Mach-Zehnder optical modulator according to claim 2, wherein:
the optical waveguide includes a first arm waveguide and a second arm waveguide;
the input side lead-out line includes a first input side lead-out line and a second input side lead-out line, the first input side lead-out line including a first end to which a modulation signal is input, the second input side lead-out line being on the dielectric layer adjacent to the first input side lead-out line and including a first end to which a signal complementary to the modulation signal is input;
the phase modulation electrode line includes a first phase modulation electrode line and second phase modulation electrode line on the dielectric layer along the respective first and second arm waveguides, the first and second phase modulation electrode lines including first ends connected to respective second ends of the first and second input side lead-out lines;
the output side lead-out line includes first and second output side lead-out lines, the first and second output side lead-out lines including first ends connected to respective second ends of the first and second phase modulation electrode lines; and
the electrode includes a first electrode and a second electrode configured to apply respective modulation signals to the first and second arm waveguides, the respective modulation signals propagating through the first and second phase modulation electrode lines.