Introducing Linear Pluggable Optics (LPO)
This article gives a short insight into how LPO technology works, how it differs from DSP-based optics, the scenarios where it offers the most advantages, and the
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It enables Ethernet-like links with 1, 2, 4, or 8 lanes for data centers, using low power, high port density, low cost, and low latency pluggable transceiver modules in form factors such as QSFP . The idea is simple: instead of a DSP (digital signal processor) inside the module – replacing it with transimpedance amplifier (TIA) and a driver chip with high linearity and EQ capability – LPO shifts signal processing into. With the advent of Artificial intelligence (AI) and the push to increase domestic manufacturing, the data center workloads and associated power consumption is growing, having tripled in the past decade. This advantage is particularly important in high-performance computing (HPC) scenarios, where minimizing latency is a key factor in achieving optimal performance. 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. During high-speed signal transmission, obvious insertion loss, jitter, and signal attenuation can easily occur.
