A 53-Gbaud NRZ/PAM4 × 8-Channel 1060-nm Single-Mode VCSEL-Based Ultra-Compact and High-Energy-Efficient CPO Transceiver for Full-Reach Datacenter Links. - Wataru Yoshida; Yuto Iwane; Kazuya Nagashima; Kazutaka Takeda; Hideyuki Nasu; Fumio Koyama (OFC, 2026)