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

Claim 18:
19. The semiconductor Mach-Zehnder optical modulator according to claim 13, further comprising:
a first ground line along a propagation direction of the modulation signal on the dielectric layer outside the first input side lead-out line, the first phase modulation electrode line, and the first output side lead-out line;
a second ground line along the propagation direction of the modulation signal on the dielectric layer outside the second input side lead-out line, the second phase modulation electrode line, and the second output side lead-out line; and
a plurality of wires electrically connecting between the first and second ground lines, wherein the plurality of wires are disposed at intervals of ¼ or less of a guide wavelength of a maximum frequency in a band of the modulation signal.