A 4λ×128Gb/s PAM-4 Si-Photonic Transmitter with Micro-Ring Modulator and Co-designed Linear Driver for Chiplet Optical I/O. - Siyuan Ma; Yingjie Ma; Chaoyang Dai; Sikai Chen; Qianli Ma; Yihan Chen; Haoran Yin; Yujun Xie; Guike Li; Jian Liu; Ming Li; Liyuan Liu; et al. (OFC, 2025)