Why 5G and Data Centers Are Fueling a Massive Surge in Optical Module Demand

Demand Drivers for Optical Modules

Both 5G networks and data‑center growth are generating a substantial increase in optical‑module demand. In the 5G arena, the three major carriers are exploring xWDM front‑haul solutions that will boost the need for 25 Gbps colored‑light modules, while the split of BBU into DU and CU in transport networks adds further mid‑haul demand. Data‑center expansion, driven by traffic‑intensive applications such as AI, VR/AR, and IoT, requires higher bandwidth and more interconnects, especially under next‑generation multi‑plane network architectures.

According to Yicai Consulting, the global optical‑module market could reach US$17.7 billion by 2025, with a compound annual growth rate (CAGR) of 15 %; the data‑center segment alone is projected to grow at a 20 % CAGR.

Data‑Center Architecture Evolution

Modern data centers are moving toward multi‑plane networks that increase horizontal traffic and consequently raise interconnect requirements. As network designs shift from chassis‑based switches to box‑type switches, the number of required optical modules can increase dramatically—estimates suggest a 65‑fold rise compared with legacy architectures when using a 1:3 server dual‑uplink model.

Even as 400 Gbps modules become mainstream, 100 Gbps modules remain important for intra‑rack connections, ensuring a sizable market for both speeds.

Capital Expenditure Trends

Global ICP (Internet Content Provider) capex is entering a high‑growth phase. In 2020, seven US ICP firms were expected to increase annual capex by US$9.97 billion, while Chinese tech giants announced multi‑year investments of RMB 2 trillion (Alibaba) and RMB 5 trillion (Tencent) in cloud infrastructure.

5G Deployment Models

The industry is converging on a shared‑infrastructure CRAN (Centralized‑RAN) model, which reduces the need for end‑site equipment and transmission assets, lowering site acquisition and rental costs. CRAN also enables DU pooling and cloudification, facilitating resource sharing across cells. Because CRAN consumes significant front‑haul fiber, xWDM solutions (CWDM, MWDM, LWDM, DWDM) are expected to become the dominant technology.

Industry Consolidation and Capacity Shifts

From 2015 to 2019 the optical‑module market experienced “head‑end consolidation” and “capacity eastward” trends. Major acquisitions such as II‑VI’s purchase of Finisar and Lumentum’s acquisition of Oclaro reshaped the competitive landscape, reducing overall capacity while enhancing the capabilities of Chinese manufacturers. Chinese firms’ market share among the top‑10 rose from 1 % in 2015 to 27 % in 2019.

Domestic Optical‑Chip Progress

China’s home‑grown optical‑chip initiatives are narrowing the gap in the 10 Gbps domain and advancing capabilities in the 25 Gbps space, though full localization targets remain unmet. Continued R&D and production breakthroughs are improving upstream supply‑chain stability.

Company‑Level Analyses

Jingji Xuchuang (中际旭创) : Leading optical‑module supplier poised to benefit from 400 Gbps demand; forecasts 2020‑2022 North American 400 G module shipments of 0.5‑0.8 million, 1.6 million, and >2.5 million units respectively. Also pursuing 5G opportunities through acquisitions and 25 G MWDM module deliveries.

Tianfu Communications (天孚通信) : Expanding high‑end passive‑device portfolio, now offering 13 product lines (e.g., AWG, FA, BOX) with increasing module‑level value contribution.

Bochuang Technology (博创科技) : Introduced 25 G silicon‑photonic and 400 G silicon‑photonic modules; formed a joint venture with Sicoya and Shaanxi Yuanjie to strengthen silicon‑photonic capabilities.

Xin Yisheng (新易盛) : Revenue mix improving; 5G product revenue optimized and 400 G opening new market space, supporting resilient growth.

Huagong Technology (华工科技) : Dual focus on optical communications and laser‑processing equipment; gains from 5G‑driven demand and data‑center expansion, with enhanced optical‑chip progress.

Guangxun Technology (光迅科技) : Full‑stack optical‑communication supplier covering chips, devices, modules, and subsystems; domestic leadership in 10 G/25 G DFB/EML chip development.

Cambridge Technology (剑桥科技) : Emerging module player scaling capacity, emphasizing 100 G and 400 G module volume growth.

Overall, the convergence of 5G traffic growth and data‑center capacity expansion creates a robust, long‑term growth trajectory for optical modules, while industry consolidation, domestic chip advancements, and strategic investments shape a competitive yet increasingly localized market.