According to a recent analysis, the expansion of AI computing power is driving a significant increase in demand for optical modules. The rapid iteration towards 800G/1.6T products is pushing power consumption higher, making liquid cooling a necessary solution and creating a vast market opportunity for liquid-cooled optical module cages. Traditional cage manufacturers possess strong production line reusability and stable customer resources. By extending their value chain into liquid cooling modules, relevant companies are actively developing liquid-cooled products and expanding capacity to fully capitalize on this industry upgrade.
Growing Demand and Structural Shifts in Optical Modules
The rise and continuous evolution of large AI models are leading to exponential growth in computing power demand, driving data center expansion and upgrades. As a core component of data center communication systems, optical modules stand to benefit significantly. Market forecasts project global optical module sales to reach approximately $19.5 billion by 2025, a year-on-year increase of about 82%, with the market expected to grow to $63.8 billion by 2031, representing a compound annual growth rate of 22% from 2025 to 2031. Structurally, as distributed training architectures become mainstream, the need for synchronizing model parameters between nodes imposes higher requirements on the bandwidth and latency performance of optical transceiver modules, accelerating the adoption of high-speed optical modules. Currently, 800G optical modules are the mainstream product in global data centers, with 1.6T and even 3.2T modules gradually entering the commercialization phase. Projections indicate the combined market size for 800G and 1.6T optical modules will exceed $16 billion by 2029.
Power Consumption Drives Liquid Cooling Adoption, Opening a Vast Market
An optical module cage, which houses the I/O connector module, provides shielding and fixation and typically incorporates a heat sink for thermal control. As product transmission rates iterate, the power consumption of optical modules has increased substantially, pushing traditional air cooling close to its physical limits. For instance, an 800G optical module consumes about 25-30W, while a 1.6T DR8 DSP version can exceed 45W, with a heat flux density over 100W/cm², far surpassing the approximate 50W/cm² limit of traditional air cooling. Liquid cooling technology, with its advantages of efficient heat exchange, low power consumption, and high reliability, has become the essential solution for 1.6T and higher-speed optical modules. Integrating a cold plate onto a traditional cage can improve cooling efficiency by over 30%, while also significantly increasing the value per cage unit. Market forecasts suggest the global liquid cooling market for optical modules will reach about $1 billion by 2026 and exceed $6.3 billion by 2030, representing a compound annual growth rate of 58% from 2026 to 2030.
Traditional Cage Manufacturers Poised to Benefit from Reusable Assets
On one hand, there is overlap in production processes, such as precision stamping, between traditional cages and liquid-cooled cages. Traditional air-cooled cage manufacturing focuses on precision stamping and surface treatment. Liquid-cooled cages extend this production chain by integrating a liquid cold plate to form a thermal management module, addressing heat dissipation in high-speed, high-power optical modules. This adds processes like cold plate manufacturing, sealing and welding, and airtightness testing. On the other hand, the primary downstream customers for cages are internationally renowned connector manufacturers. Since coolant leakage can cause severe damage like electrochemical corrosion and circuit shorts, these customers have extremely stringent requirements for product quality and stability. They may place greater trust in existing cage suppliers with a proven track record of cooperation.
Accelerating Penetration and Focus on Domestic Suppliers
Currently, the manufacturing of optical module cages is predominantly concentrated among domestic producers. As demand for high-speed optical modules continues to rise and power consumption grows, liquid cooling is accelerating its penetration into optical module cages, promising a broad market for this technology. It is believed that traditional domestic cage manufacturers are actively developing advanced liquid-cooled products, planning and expanding supporting production capacity. By leveraging their existing customer relationships from traditional products and continuously participating in product testing and certification, they are well-positioned to seize this industry opportunity.
Key Risks to Consider
Potential risks include slower-than-expected iteration of high-speed optical module products, slower-than-anticipated adoption of liquid cooling technology, and delays in the construction progress of AI data centers. Any mention of specific companies in this analysis is based on the objective compilation of publicly available information and does not constitute a recommendation or coverage opinion.
Comments