Why are 100g optical modules so expensive

100G optical module prices are rising due to surging AI-driven demand, supply chain bottlenecks, high-cost electronic chips, and increasing raw material prices.AI-Driven Demand and Data Center ExpansionThe rapid growth of AI computing is driving massive expansion in data centers, which in turn increases demand for high-speed optical modules, including 100G, 400G, and 800G. Cloud vendors are significantly increasing capital expenditures to support AI infrastructure, with global spending on cloud infrastructure services growing over 20% year-on-year for multiple quarters . This surge in demand has created a tight supply environment, pushing prices upward .Supply Chain and Technological BottlenecksHigh-speed optical modules rely on advanced electronic chips, particularly DSP chips, which are expensive and technologically complex. These chips are manufactured using advanced nodes (7nm, 5nm, or smaller), requiring substantial R&D and long-term investment. The market is dominated by a few vendors, limiting competition and maintaining high prices . Additionally, production capacity for advanced packaging technologies like CoWoS is limited, further constraining supply .Raw Material CostsKey raw materials, such as indium phosphide (InP) substrates, have seen sharp price increases, with 2-inch InP substrates rising by 50% . These materials are essential for high-speed optical components, and their rising costs directly contribute to higher module prices.Transition to Higher-Speed ModulesThe industry is moving toward 400G, 800G, and 1.6T modules. As manufacturers upgrade technology, the unit cost of optical modules increases due to more complex PCBs, higher-grade materials, and additional layers in circuit boards. For example, the PCB cost for an 800G module can be $15–$25 higher than a 400G module, and 1.6T modules add another $20–$30 per unit . This technological iteration indirectly affects 100G module pricing as production lines and supply chains adjust.Geopolitical and Policy FactorsManufacturers face pressure to diversify supply chains due to geopolitical concerns, leading to short-term cost increases. Policies supporting domestic production and subsidies for key materials also influence pricing dynamics .SummaryIn short, rising 100G optical module prices are driven by a combination of exploding AI-related demand, limited high-speed chip supply, increasing raw material costs, technological upgrades, and geopolitical pressures. Buyers are advised to consider long-term supply agreements and evaluate cost-performance trade-offs across different module speeds to mitigate short-term price volatility .