140-Gb/s 20-km Transmission of PAM-4 Signal at 1.3 <inline-formula> <tex-math notation="LaTeX">$\mu \text{m}$ </tex-math></inline-formula> for Short Reach Communications

140-Gb/s 20-km Transmission of PAM-4 Signal at 1.3 - for Short Reach Communications | IEEE Journals & Magazine | IEEE Xplore