{"id":5407,"date":"2026-05-14T01:43:17","date_gmt":"2026-05-14T01:43:17","guid":{"rendered":"https:\/\/lp.szlogic.cn\/knowledge-center\/qsfp28-100g-psm4-transceivers-for-data-centers\/"},"modified":"2026-05-25T09:13:35","modified_gmt":"2026-05-25T09:13:35","slug":"qsfp28-100g-psm4-transceivers-for-data-centers","status":"publish","type":"post","link":"https:\/\/lp.szlogic.cn\/ru\/knowledge-center\/qsfp28-100g-psm4-transceivers-for-data-centers","title":{"rendered":"Unlock High-Density 100G Connectivity: Your Guide to the 100G PSM4 Optical Module"},"content":{"rendered":"
\"QSFP28<\/figure>\n\n\n\n

The relentless surge of cloud computing, AI, and hyperscale applications demands ever-faster, denser, and more cost-effective data center interconnects (DCI). Enter the <\/span>100G PSM4 (Parallel Single-Mode 4-lane)<\/strong><\/span> optical module \u2013 a crucial workhorse powering efficient 100 Gigabit Ethernet (100GbE) links. This guide dives deep into what makes PSM4 a vital solution for modern network infrastructure.<\/span><\/p>\n\n\n\n

\ud83d\udca1 Knowing about PSM4 technology helps network engineers pick the best choice for strong and growing performance.<\/p>\n\n\n\n

\ud83d\udcdd What is a 100G PSM4 Optical Module?<\/strong><\/h2>\n\n\n\n

A 100G PSM4 transceiver is a pluggable optical module designed for 100G Ethernet<\/strong> transmission over single-mode fiber <\/strong>(SMF)<\/strong><\/a>. It utilizes four independent optical lanes, each operating at 25Gbps (using NRZ modulation<\/strong><\/a>) at the 1310nm wavelength<\/strong>. Unlike 100G<\/strong> CWDM4 transceivers<\/strong><\/a>, which multiplexes wavelengths onto a single fiber pair, PSM4 requires eight fibers<\/strong> (4 Tx, 4 Rx) \u2013 a dedicated pair for each lane. This “parallel optics” approach offers distinct advantages.<\/p>\n\n\n\n

\ud83d\udcdd Key Advantages of 100G PSM4 Technology<\/strong><\/h2>\n\n\n\n
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  1. Cost Efficiency:<\/strong> \ud83d\udcb0 PSM4 leverages lower-cost optical components compared to wavelength-multiplexing solutions like CWDM4<\/strong>. The simpler optics translate into a lower-cost 100G transceiver<\/strong>, especially significant for large-scale deployments.<\/p><\/li>\n\n\n\n

  2. Low Latency:<\/strong> \u26a1 The direct parallel transmission path minimizes signal processing complexity, resulting in ultra-low latency<\/strong> \u2013 critical for high-frequency trading, AI clusters, and financial applications.<\/p><\/li>\n\n\n\n

  3. High Density & Scalability:<\/strong> \u2b50 PSM4 modules are typically QSFP28 form factor<\/strong>, enabling high port density on switches and routers. They are ideal for leaf-spine architectures<\/strong> and top-of-rack (ToR)<\/strong> to aggregation\/distribution<\/strong> switch connections within a data center hall.<\/p><\/li>\n\n\n\n

  4. Reliable SMF Performance:<\/strong> \ud83d\ude80 Utilizing proven single-mode fiber ensures longer reach potential<\/strong> (up to 500m, often 2km with quality modules like LINK-PP’s) and superior performance<\/strong> compared to multi-mode solutions (like SR4) over similar distances.<\/p><\/li>\n<\/ol>\n\n\n\n

    \ud83d\udcdd Ideal Applications for 100G PSM4 Modules<\/strong><\/h2>\n\n\n\n