The global optical transport market continued its upward trajectory in the third quarter of 2025, according to the latest report from Dell’Oro Group. The research points to sustained momentum across key customer segments and technology areas, fueled by rising data traffic, cloud expansion, and demand for higher-capacity networks.
The Optical Transport Systems market expanded by 15 percent year-over-year in 3Q2025. Growth was broad-based, with both cloud operators and communication service providers increasing investments to support next-generation connectivity needs. Cloud Providers recorded the strongest jump, with spending surging 58 percent year-over-year as hyperscale data center operators upgraded backbone links and expanded inter-data center capacity. The DWDM Long Haul segment also remained resilient, posting 24 percent growth during the same period as networks were prepared for more high-bandwidth applications.
A major contributor to overall market performance was data center interconnect. Direct sales for DCI infrastructure grew 34 percent year-over-year, underscoring the expanding role of cloud traffic and the need for faster, more scalable optical links between facilities. Non-DCI applications also saw a 7 percent increase, supported primarily by communication service providers stepping up investments to enhance transport capacity and modernize backbone networks.
Vendor performance in the first nine months of 2025 reflected shifting dynamics in the competitive landscape. Ciena and Nokia each gained more than one percentage point of market share, benefiting from strong uptake of their optical platforms. Additional gains were observed for 1Finity, Adtran, Cisco, and Smartoptics, indicating widening demand for diverse technology options and next-generation wavelength solutions.
With rising cloud workloads, increasing fiber rollout, and growing reliance on high-capacity transport technologies, the optical market is positioned for continued expansion. The latest data from Dell’Oro Group highlights how both hyperscalers and service providers are accelerating investments to meet the demands of the digital economy.
Shafana Fazal
