Patent ID: 11914264
Assignee: OPENLIGHT PHOTONICS, INC.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 9:
10. A photonic integrated circuit (PIC) comprising:
a laser to emit light at an operating wavelength; and
a hybrid photonic ring modulator comprising:
a silicon bus waveguide vertically coupled to a ring-shaped active region of a p-i-n diode structure formed of compound semiconductor material, an optical input of the silicon bus waveguide coupled to an output of the laser, and an optical output of the silicon bus waveguide coupled to an output port of the PIC;
a heater placed near the p-i-n diode structure;
electrodes and associated electronic driver circuitry configured to apply a voltage across the p-i-n-diode structure, the voltage including a reverse bias voltage and a radio-frequency (RF) voltage swing; and
memory storing a target value of the reverse bias voltage and a target value of a power of the heater,
wherein the target value of the reverse bias voltage maximizes a tuning efficiency of shifting, by a change in the applied voltage, a spectral location of a modulator response of the photonic ring modulator, subject to exceeding a specified loss cutoff level for a maximum modulator insertion loss at a resonance wavelength of the modulator response,
wherein the target value of the heater power optimizes an offset between the operating wavelength and the resonance wavelength of the modulator response at the target value of the reverse bias voltage to achieve a target insertion loss at the operating wavelength.