2021 Optical Modules

In 2021, the optical module market experienced strong growth, driven by data center expansion, 400GbE adoption, and Chinese manufacturing dominance.Market Revenue and Growth

The global optical component market reached US$14.5 billion in 2021, with datacom optical components alone generating US$4.7 billion, a 27% increase from the previous year due to hyperscale data center expansion and cloud operator investments . The optical transceiver segment, particularly fiber optic transceivers, accounted for the largest revenue share, driven by high-speed data transmission requirements in data centers . Shipments of 400GbE datacom modules doubled in 2021, with QSFP-DD DR4 formats dominating, while 400Gbps pluggable coherent modules, mainly QSFP-DD ZR, also saw significant adoption .

Technological Trends

High-speed modules above 100G were widely adopted, with 400G, 600G, and 800G modules deployed across data center and metro networks . Ethernet switch ASICs running at 50Gbps lane rates with PAM-4 modulation were common, and co-packaged optics (CPO) emerged as a new deployment model, integrating optics with ASICs to reduce PCB trace lengths and improve performance . Active Optical Cables (AOCs) and Embedded Optical Modules (EOMs) gained traction for high aggregate data rate links at lower costs compared to separate transceivers .

Regional Manufacturing and Supply Chain

China dominated global optical module manufacturing, accounting for over 70% of production, with Shenzhen and Suzhou as major hubs . Supply chain disruptions, including semiconductor shortages, affected delivery times, particularly for high-speed modules, causing delays of up to 15% in 2022 for some 2021 orders . Geopolitical tensions, such as US-China trade restrictions, influenced the global supply chain and market dynamics, impacting companies like Huawei and ZTE .

Applications

• Data Centers: 45% of global optical module revenue, driven by cloud computing and AI workloads .
• Telecommunication Networks: 28% of revenue, including wireless and wired infrastructure .
• Automotive: Emerging demand for LiDAR and V2X communication, with growth of 30% in 2023, reflecting early adoption trends in 2021 .

Key Players

Major global players included Cisco, Huawei, II-VI, Broadcom, Finisar (II-VI), Lumentum, Inphi, Intel, and Applied Optoelectronics, alongside Chinese companies like Accelink, Fiberhome, HG Genuine Optics, and Source Photonics . The market remained fragmented, with new Chinese entrants recognized in 2021, updating the global ranking .

Summary

In 2021, the optical module industry was characterized by rapid adoption of 400GbE modules, strong revenue growth in datacom, technological innovation with co-packaged optics, and Chinese manufacturing dominance, while supply chain and geopolitical factors influenced global distribution and deployment. These trends set the stage for continued growth and higher-speed module adoption in subsequent years.