Swedish optical module LPO

Swedish LPO optical modules use Linear Pluggable Optics technology to deliver low-power, low-latency, and high-density optical connectivity by shifting signal processing from the module to the host ASIC.

Overview of LPO Technology

Linear Pluggable Optics (LPO) replace the traditional digital signal processor (DSP) inside an optical module with linear analog components, such as transimpedance amplifiers (TIA) and high-linearity driver chips, while the host device (switch or NIC) handles digital signal processing tasks like equalization and error correction . This architecture reduces power consumption by up to 30%, lowers latency, and simplifies thermal management, making it ideal for high-density fabrics, AI clusters, and hyperscale data centers .

Key Advantages

• Ultra-low power consumption: Removing the DSP reduces energy usage, which is critical for large-scale deployments .
• Lower latency: Shifting signal processing to the host ASIC improves synchronization in AI/ML workloads and GPU fabrics .
• Simplified thermal design: Less heat generation allows for denser module placement and easier cooling .
• Pluggable form factor: LPO modules maintain hot-swappable, interoperable designs compatible with standard form factors like OSFP, QSFP-DD, and QSFP112 .
• EU-tested and validated: Swedish LPO modules undergo independent testing for power, signal integrity, and interoperability .
• White-label capability: Modules can be branded for OEMs while retaining proven performance .

Applications

LPO modules are optimized for short-reach, high-density connections where efficiency and low latency are critical. Typical use cases include:

• AI and HPC clusters: Faster synchronization and reduced power per link improve large-scale training efficiency .
• Hyperscale data centers: Leaf-spine networks benefit from higher port density and lower operational costs .
• Telecom and enterprise networks: LPO supports 400G/800G links with compliance to CEI-112G-LINEAR-PAM4 standards .

Considerations and Limitations

• Transmission distance: LPO modules may have shorter reach and slightly higher bit error rates compared to DSP-based optics due to the absence of in-module signal regeneration .
• Host compatibility: Proper performance depends on the host ASIC's ability to handle linear signal processing; modules must be qualified for supported platforms .
• Standards and interoperability: LPO is based on open standards defined by the LPO MSA, ensuring multi-source interoperability across electrical and optical interfaces .

Example Products

Swedish Telecom Opto offers EU-tested 400G/800G LPO modules for data centers and AI workloads, while other vendors like Amphenol provide XPO-LPO transceivers delivering up to 12.8T Ethernet connectivity with 224 Gb/s per lane, featuring MPO optical interfaces and compliance with OIF CMIS standards .

In summary, Swedish LPO optical modules provide a power-efficient, low-latency alternative to DSP-based optics, particularly suited for high-density, short-reach applications in modern data centers and AI/HPC environments.