Haowen Shu, Lin Chang, Chenghao Lao, Bitao Shen, Weiqiang Xie, Xuguang Zhang, Ming Jin, Yuansheng Tao, Ruixuan Chen, Zihan Tao, Huajin Chang, Shaohua Yu, Qifan Yang, Xingjun Wang, John E. Bowers. Submilliwatt, widely tunable coherent microcomb generation with feedback-free operation[J]. Advanced Photonics, 2023, 5(3): 036007