DESCRIPTION The PAM4 RF amplifier is a single input high performance broadband optical modulator driver with very low jitter, 3. 3 V swing, with excellent gain and group delay flatness, matched to 38GHz. In this process, a strong continuous-wave pump laser co-propagates or counter-propagates with the signal in an optical fiber. Energy is transferred from the pump to the signal via phonon. The Marvell Ara PAM4 DSP is a next generation solution for GenAI and cloud datacenter interconnects utilizing pluggable transceivers. Ara features eight 200Gbps/channel PAM4 host electrical interfaces, and an octal 200Gbps/lane PAM4 optical interface with integrated high-swing laser-modulator. MACOM's optoelectronics products include a wide range of transimpedance amplifiers (TIA) for line and client side fiber optic receivers up to 1. Our portfolio includes linear TIAs for coherent and PAM-4 receivers and limiting TIAs for NRZ based receivers. Figure 1-1 shows the typical waveform. We distinguish the PAM4 bit rate from its symbol rate, refer ling, but the formal description is 2-level pulse amplitude modulation, or PAM2. Since PAM4 signal do not return-to-zero after each symbol, they are also an NRZ signaling scheme.
