In this blog, we take a higher-level look at PAM4, the modulation scheme that makes short distance 400G networking possible, and discuss how this technology has enabled big leaps in optical networking as we know it. The Marvell® PAM4 optical DSP portfolio, including Spica™ and Nova™ DSPs, addresses the critical the need for high-bandwidth optical interconnects to power AI infrastructure. Insatiable – that's a word that so aptly describes the ever-growing bandwidth. PAM4 is a branch of the pulse amplitude modulation (PAM) technology, which is a mainstream signal transmission technology following non-return-to-zero (NRZ). So what is PAM4 modulation and how is it transforming optical networking?To enable Ethernet speeds of 400G and beyond, PAM4 multilevel signaling is required, rather than NRZ modulation preferred for 100G applications. 26 Billion in 2026 and is projected to reach USD 30. It grows at a compound annual growth rate (CAGR) of around 9% from 2026 to 2035. I need the full data tables, segment breakdown, and.
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