Circuits and methods for wavelength locking of optical receiver WDM filters

US12072239B1 · kind B1 · utility

Assignee

• XILINX, INC. · US

Inventors

• Zhaowen Wang · San Jose, US
• Mayank Raj · San Jose, US
• Chuan Xie · Fremont, US
• Sandeep Kumar · Cupertino, US
• Muqseed Mohammad · Singapore, SG
• Sukruth Pattanagiri Giriyappa · Singapore, SG
• Stanley Y. Chen · Cupertino, US
• Parag Upadhyaya · Los Gatos, US
• Yohan Frans · Palo Alto, US

Key dates

• Filing date: Mar 30, 2023
• Grant date: Aug 27, 2024
• Expiry date: Mar 30, 2043

Classification

• Technology area (CPC G): Physics
• CPC primary: G02F1/0147
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An integrated circuit (IC) device includes a controller circuitry having an input coupled to a photodiode of an optoelectronic circuitry and an output coupled to a heater of the optoelectronic circuitry, the controller circuitry configured to determine a center frequency of the optoelectronic circuitry based on a shape of an input signal received from the photodiode, and provide a heater signal to the heater based on the shape of the input signal and the center frequency of the optoelectronic circuitry.