The 100G-DR-LPO specification by the LPO (Linear Pluggable Optics) MSA defines 100 Gb/s/lane 53. 125 GBd PAM4 optical interfaces, optical links using standard single-mode fiber with up to 500 m reach, and host-module electrical interfaces for hosts with DSP based SerDes and RS(544,514) FEC. Marvell leads the pluggable module ecosystem with low-power, high-performance silicon for AI, cloud, enterprise and 5G. Last November, Credo Semiconductor was first to announce a transmit-only 800G PAM4 DSP for half-retimed modules, which are now known as linear-receive optics (LRO). At OFC, Marvell joined the LRO bandwagon with Spica Gen2-T, a transmit-only version of its 5nm 800G DSP. The company claims the new. MaxLinear's highly integrated PAM4 DSPs offer superior link-margin performance and low power to enable 100G, 400G, 800G, and 1. Traditionally, digital signals are encoded for transmission in two levels, 0 and 1.
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