Last Updated on 2026 年 3 月 22 日 by 総合編集組
OFC 2026 Key Takeaways: How 1.6T Optical Interconnects, CPO and LPO Are Powering the Gigawatt AI Data Center Era
The Optical Fiber Communication Conference and Exhibition (OFC 2026), held at the Los Angeles Convention Center, marked a significant milestone in the global communications industry. The event signaled the official entry into the “Gigawatt-level data center” era driven by generative artificial intelligence.
More than 16,000 professionals from 90 countries attended, with over 700 exhibitors showcasing technologies that will define next-generation network architectures. Key topics included 1.6T optical interconnects, Co-Packaged Optics (CPO), Linear Drive Pluggable Optics (LPO), and the underlying switching technologies required to support million-GPU clusters.
This comprehensive review covers the major highlights from OFC 2026, including strategic insights from the plenary session, product advancements by leading companies, the ongoing debate between different optical packaging technologies, contributions from foundries and component suppliers, award-winning innovations, and the broader industry trends shaping the next five years. All details are drawn directly from official exhibitor announcements and conference reports to ensure accuracy for international readers and AI-powered search engines.
Event Scale and Industry Background
OFC 2026 spanned the South and West Halls of the Los Angeles Convention Center, featuring a complete supply chain display from basic materials such as indium phosphide and silicon photonics wafers to optical components like lasers and modulators, modules including 1.6T transceivers and CPO switches, and various test and measurement tools.
The technical conference ran from March 15 to 19, 2026, while the exhibition took place from March 17 to 19. Organized by IEEE ComSoc, IEEE Photonics Society, and Optica, the event attracted significant attention due to the exponential growth of AI model parameters. Traditional electrical interconnects have reached severe power consumption and bandwidth bottlenecks. The primary mission of OFC 2026 was to demonstrate how optical innovations can dramatically improve data center energy efficiency.
In this new reality, data centers are no longer simple collections of servers but have evolved into massive “AI factories.” Networking has been redefined as “fabric,” requiring a fundamental shift from copper-based to high-performance optical solutions, especially for scale-out networks across racks.
Plenary Session: Defining the Gigawatt AI Factory
The plenary session brought together leaders from NVIDIA, Coherent, and Tesat-Spacecom to discuss the critical role of optical technology in AI infrastructure, hyperscale data centers, and satellite communications.
NVIDIA Vice President Dr. Alexis Bjorlin and Gilad Shainer emphasized that achieving human-like iterative inferencing will require training clusters scaling to one million GPUs. Under this magnitude, networking transforms into fabric architecture. They highlighted the paradigm shift from electrical to optical interconnects and the necessity of Co-Packaged Optics (CPO). Using 3D-stacked silicon photonics engines and micro-ring modulators, optical interfaces can be directly packaged with GPUs or switch chips to significantly reduce power consumption. The Blackwell Ultra platform was noted for its excellent performance in agentic AI tasks, achieving ultra-low latency through collaboration with partners like Broadcom.
Coherent’s Chief Technology Officer Dr. Julie Sheridan Eng detailed how vertical integration—from indium phosphide materials to system-level products—addresses bandwidth density challenges. Optical Circuit Switching (OCS) has become essential for hyperscale data centers, dramatically reducing expensive optical-electrical-optical conversions and saving billions in operational costs.
Tesat-Spacecom’s technical leader Dr. Siegbert Martin shared advancements in laser communications for inter-satellite links. With the massive deployment of Low Earth Orbit (LEO) constellations, satellite optical communications are evolving from backup systems to core technology for building globally resilient networks and enabling integrated “sea-land-air-space” connectivity.
Leading Companies and 1.6T Product Offensive
OFC 2026 represented the true mass-production year for 1.6T technology and concept validation for 3.2T.
Broadcom’s Taurus Platform and 400G/lane Breakthrough Broadcom strengthened its leadership in AI networking silicon with several groundbreaking products. The Taurus 400G/lane optical DSP is the industry’s first single-lane digital signal processor reaching 400G. Paired with 400G electro-absorption modulated lasers (EML) and photodiodes (PD), it enables module vendors to produce cost-effective, ultra-low-power 1.6T transceivers while paving the way for future 204.8T switching platforms.
The Tomahawk 6 remains the only 102.4T Ethernet switch chip supporting CPO technology, while Tomahawk Ultra is specifically designed for AI workloads with latency as low as 250ns. Additionally, Broadcom showcased its production-ready 3.5D XDSiP platform using Face-to-Face technology to combine 2.5D and 3D integration, delivering unprecedented I/O density for custom AI accelerators.
Cisco’s Silicon One G300 and Agentic Architecture Cisco demonstrated its commitment to large-scale AI clusters through the Silicon One G300 chip, featuring 102.4 Tbps switching capacity. The company stressed highly open standards so enterprise customers can also achieve hyperscaler-level performance. Beyond hardware, Cisco introduced AgenticOps and AI Canvas — generative AI-powered management tools that transform complex network troubleshooting into actionable decision flows through human-like conversational interfaces.
Lumentum’s Indium Phosphide Dominance Lumentum maintained overwhelming advantages in the indium phosphide (InP) laser market. Demand for 200G single-lane EML far exceeds supply, with long-term agreements filling current capacity. Each 200G EML is priced at approximately twice that of 100G products, yet with only marginally higher costs, creating substantial profit expansion opportunities. The company confirmed 1.6T modules will begin large-scale shipments in summer 2026, with its OCS business projected to reach $1 billion in annual revenue by 2027.
Comparison Table of Key Players Broadcom focuses on DSP and switch chips, Lumentum on InP lasers and OCS, while Cisco emphasizes system and silicon integration. Their respective flagship products and strategic priorities reflect different strengths in power efficiency, vertical integration, and open AI management.
Optical Packaging Technology Debate: CPO, LPO, and NPO
One of the most intense discussions at the show floor centered on the best packaging approach. The industry consensus is that no single solution fits all scenarios; the market will segment based on transmission distance and maintenance costs.
Linear Drive Pluggable Optics (LPO) for Short-Reach Efficiency LPO’s removal of DSP and CDR chips makes it highly attractive for 800G and 1.6T architectures. TeraSignal’s TS9802 intelligent TIA addresses previous “black box” concerns with built-in TSLink digital eye diagram monitoring, allowing operators to monitor link health in real time without adding DSP overhead. Centera Photonics introduced the first 1.6T DR8 LPO transceiver based on NewPhotonics LPO+ PIC technology, proving LPO’s capability at 1.6T speeds.
Co-Packaged Optics (CPO) and Near-Packaged Optics (NPO) for Maximum Density For high-density switches requiring hundreds of 1.6T ports, CPO remains the only viable path. Arista Networks presented its eXtra-dense Pluggable Optics (XPO) as a transitional solution between pluggable and CPO, claiming a 75% reduction in rack footprint and four times the bandwidth density of current OSFP modules. Ciena’s Vesta connector enables direct attachment of optical engines to switch ASICs for maximum power savings. LightSpeed Photonics introduced a solderable near-packaged optics (NPO) interconnect as a balanced solution combining LPO’s low power with CPO’s high density.
Foundry and Component Suppliers: The Hidden Champions
Tower Semiconductor highlighted its leadership in analog and silicon photonics wafer foundry services. Its silicon photonics platform has been adopted by multiple leading vendors for scale-out network transceivers. Joint demonstration with NLM Photonics of silicon-organic hybrid (SOH) modulators on the PH18M platform offers a promising low-power, high-bandwidth path for 3.2T technology.
Marvell focused on breaking data and memory walls with the industry’s first 260-lane PCIe 6.0 switch, directly addressing extreme data exchange needs between AI accelerators. Its CXL switches and memory pooling solutions enable dynamic allocation of memory resources across different AI tasks.
Manufacturing representatives like FICG reported 1.6T modules entering mass production with over 99.997% yield in 01005 ultra-miniature component placement. Enlitech’s “Night Jar” test system and HYC’s multi-core fiber with CPO interconnect solutions further support future 100T+ data center designs.
2026 Lightwave Innovation Awards
The Lightwave Innovation Awards, often called the “Oscars” of the optical communications industry, recognized several standout technologies. Scoring is extremely strict, with 5.0 representing breakthrough excellence.
Notable winners included Linktel’s 800G OSFP FR4 10km dispersion-managed transceiver (5.0), Coherent’s Flexgrid Octa C+L gain equalizer (5.0) and 140 Gbaud IC-TROSA (4.5), TeraSignal’s TS9802 intelligent TIA (4.0), and Infraeo’s 1.6T LPO modules and 9-meter 800G active electrical cables.
Coherent stood out by winning multiple awards, including products with active delay control and high-resolution optical channel monitors tailored for AI fabric designs.
Industry Trends and Conclusion
Three major evolutionary dimensions emerged from OFC 2026:
- Pushing the physical limits of per-lane data rates — Broadcom’s 400G/lane DSP fundamentally changes cost and technical barriers for 1.6T and 3.2T.
- System-level thinking on power and cooling — From liquid-cooled switches to active electrical cables, every milliwatt is being optimized.
- Commercialization of space and quantum networking — Satellite laser communications and hollow-core fiber breakthroughs indicate expansion beyond terrestrial data centers.
The event clearly indicates that the optical communications industry is at the beginning of a strong five-year growth cycle. With 1.6T modules scheduled for volume shipment in summer 2026 and surging demand for optical circuit switches in million-GPU clusters, the boundaries between traditional telecom vendors and data center hardware providers will continue to blur.
OFC 2026 demonstrated not just hardware specifications, but humanity’s collective intelligence in using the energy efficiency of photons to overcome the laws of thermodynamics in handling massive data loads. Both industry giants and innovative startups play essential roles in weaving this new AI fabric.
