DWDM (Dense Wavelength Division Multiplexing): Enables multiple high-capacity wavelengths to travel over a single optical fiber, ideal for long-haul DCI. OTN (Optical Transport Network): Provides error correction and efficient multiplexing for optical signals. Widely deployed across the world's largest and most demanding networks, Nokia optical Data Center Interconnect (DCI) solutions empower leading hyperscalers, communications service providers (CSPs), cloud providers and enterprises to deliver massive interconnect capacity with exceptional. In short, high-bandwidth, low-latency, and high-reliability networks are now required for Data Center Interconnect (DCI). Ultra-High. At its core, optical circuit switching (OCS) is a technology that moves away from traditional electronic packet switching to create direct, reconfigurable optical circuits over a shared physical fiber infrastructure. This approach is driven by the exponential data demands of AI and hyperscale. 1State Key Laboratory of Information Photonics and Optical Communications (IPOC), Beijing University of Posts and Telecommunications, 10 Xitucheng Rd, Bei Tai Ping Zhuang, Haidian Qu, Beijing, 100876, China 2IPI-ECO Research Institute, Eindhoven University of Technology, 5600MB Eindhoven, The. To address this, Macom and NVIDIA first proposed Linear-drive Pluggable Optics (LPO) in 2022. Its core concept is to remove digital processing units such as DSPs and CDRs from the module, constructing a purely analog "linear direct-drive" optical link. In the LPO architecture: The transmitter uses. OFC and GTC are entangled because data center AI needs optical interconnect to keep compute fed. Optical interconnect has since taken over scale-out links in the data center.