Semiconductor device, photonic circuit, and method for adjusting resonant wavelength of optical modulator

A photonic circuit, comprising:

• a first waveguide;
• and
• a second waveguide spaced apart from the first waveguide;
• and
• a heater disposed on the second waveguide and configured to receive a first electrical signal and a second electrical signal, such that an alternative current passing through the heater,
• wherein the first electrical signal includes a first pulse and the second electrical signal includes a second pulse, and wherein the first pulse and the second pulse share a non-overlapped period during which the first pulse and the second pulse include a predetermined voltage.

A method for adjusting a resonant wavelength of an optical modulator, comprising:

• providing the optical modulator and a waveguide optically coupled to the optical modulator, wherein the waveguide includes an optical input terminal and an optical output terminal;
• receiving an optical signal at the optical input terminal of the waveguide;
• adjusting, by a heater driven by an alternative current, the resonant wavelength of the optical modulator to a predetermined wavelength;
• absorbing a portion of the optical signal by the optical modulator;
• and
• outputting an adjusted optical signal at the optical output terminal of the waveguide,
• wherein the heater is configured to receive a first electrical signal and a second electrical signal, such that the alternative current passing through the heater along a first direction in a first time duration and along a second direction in a second time duration, and wherein the first electrical signal includes a first pulse and the second electrical signal includes a second pulse, and wherein the first pulse and the second pulse share a non-overlapped period during which the first pulse and the second pulse include a predetermined voltage.