Yueyang Zhang Chen lei Li Tao Shu Daoxin Dai Hybrid Integrated Wavelength Tunable Laser Based on Sampled Multimode Waveguide Gratings. 1-4 2025 ECOC https://doi.org/10.1109/ECOC66593.2025.11263032 conf/ecoc/2025 db/conf/ecoc/ecoc2025.html#ZhangLSD25 streams/conf/ecoc