Messaging applications and social media platforms have taken center stage as the primary means of human interaction. Entertainment experiences are becoming increasingly smarter, encompassing a wide range of activities such as online gaming and audio/video streaming services. In this context, optical communications have emerged as a crucial catalyst driving this transformative evolution. Consequently, the focus of research and development for ICT engineers has shifted from long-distance communications to short-range optical links. Optical transceivers designed for intradatacenter communications are currently pushing the boundaries to achieve data rates of up to 200 Gbps. To accomplish this feat, they employ advanced modulation techniques such as pulse amplitude modulation (PAM).