Patent ID: 11953720
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 12:
13. A photonic circuit, comprising:
a substrate;
a first waveguide disposed on the substrate; and
an optical modulator disposed on the substrate, and separated apart from the first waveguide, the optical modulator including:
an optical coupling portion including a first portion undoped and a second portion doped;
a first electrical coupling portion adjacent to the optical coupling region, and having a first type doping; and
a second electrical coupling portion adjacent to the optical coupling region, and having a second type doping,
wherein the second portion of the optical coupling portion has a doping concentration less than that of the first electrical coupling portion and the second electrical coupling portion, and wherein the first electrical coupling portion of the optical modulator is configured to receive a first voltage to decrease a resonant wavelength of the optical modulator in nanometer level.