Coherent at the Six Five Summit: optical push for ai scale

On Wednesday, 26 August 2026, Coherent (COHR) addressed the Six Five Summit: AI Unleashed 2026, arguing that AI infrastructure's next phase hinges on optical networking designed for power efficiency, not just speed. The company highlighted strong demand for high-bandwidth links, while acknowledging rising pressures from space, energy, and regulatory constraints that could impede deployment.

Investors responded positively, with Coherent's stock up 214.63% over the past year and currently trading at $291.90. The stock is deemed undervalued by InvestingPro analysis and appears on the Most Undervalued stocks list. Coherent stated that AI workloads are being distributed across multiple data centers due to insufficient power in single sites, creating a need for "scale across" networking solutions.

The company emphasized energy efficiency as a top priority for hyperscalers and data center operators, moving it from a secondary concern. Coherent showcased its vertical integration, extensive optical portfolio, and manufacturing footprint of over 50 sites worldwide as key advantages. The company unveiled its Multi-Rail platform, which can quadruple capacity in the same physical space while maintaining sublinear power growth.

Coherent's chief marketing officer, Sanjai Parthasarathi, defined the industry's transition to a new networking model called "scale across" networking. He contrasted this with previous scale-up and scale-out designs, emphasizing its significance for frontier model developers who require novel network architectures. Parthasarathi highlighted Coherent's broad supply chain, spanning materials to systems, and its 50-year history of innovation.

The company operates more than 50 manufacturing sites globally, with a strong focus on indium phosphide production to meet growing demand. Energy efficiency has gained prominence in optical networking due to its importance for AI workloads, as hyperscalers and data center operators prioritize power use and reliability. Coherent's Multi-Rail platform, designed for infrastructure between data centers, addresses space, power, and regulatory limitations.

The platform increases capacity by four times within the same volume and with only sublinear power increases, offering substantial energy savings. Parthasarathi emphasized the platform's groundbreaking innovation and unprecedented energy efficiency, noting strong interest from hyperscale customers and original equipment manufacturers.

Optical networking serves as the backbone for global data traffic, with optical transceivers at the base of every RF tower. As AI workloads expand beyond single buildings, the architecture becomes increasingly vital for distributed systems and satellite communications.