公开(公告)号：US11320677B2

公开(公告)日：2022-05-03

申请号：US16932515

申请日：2020-07-17

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Sujie Zhou ,  Long Luo ,  Ruiqiang Ji ,  Yanbo Li ,  Mai Wang

IPC: G02F1/01

Abstract: A wavelength calibration method for a microring filter includes selecting N wavelengths from M wavelengths, and performing operations on the microring filter for each of the N wavelengths, thereby obtaining N sets of calibrated voltages, and obtaining, based on N sets of calibrated voltages, M−N sets of calibrated voltages corresponding to M−N wavelengths of the M wavelengths. The operating include adjusting thermal tuning power of the plurality of microrings in response to one set of voltages, and obtaining a plurality of sets of voltages that enable monitored optical power to have an extreme value, and using the plurality of sets of voltages as a reference, adjusting the thermal tuning power of the plurality of microrings in response to another set of voltages, and determining one of the N sets of calibrated voltages from the plurality of sets of voltages.