Xscape Photonics raises $37m, debuts FalconX laser

Xscape Photonics has raised $37 million in additional Series A funding and launched a new external laser module for optical links inside AI data centre networks.

The extension brings the company's Series A total to $81 million. Addition led the new investment, alongside existing backers including IAG Capital Partners and Nvidia.

The round also effectively doubled Xscape Photonics' valuation, though the company did not disclose a figure.

The product launch focuses on FalconX, an External Laser Small Form-factor Pluggable (ELSFP) device. Xscape Photonics calls it the first fully redundant ELSFP module capable of emitting up to eight wavelengths of light. It is designed to work with silicon photonics chips.

Data Centre Links

AI infrastructure has pushed more traffic across data centre networks, driving demand for higher-bandwidth links and lower power use. Copper-based interconnects remain common and can limit throughput between accelerators and memory across large clusters.

Xscape Photonics is positioning FalconX as a way to address what it calls an "escape bandwidth" bottleneck-the amount of data that can move between accelerators and other resources within AI clusters.

FalconX uses the company's CombX laser technology, which generates multiple wavelengths on a single silicon photonics chip. The company says the module can deliver more than 1W of optical power and emit eight colours to support multi-terabits-per-second of bandwidth.

Redundancy is central to the design. Xscape Photonics says AI clusters have grown more than tenfold over the past two years, and that a single laser module failure can degrade network performance and stall workloads. It adds that hyperscalers want far fewer failures as clusters scale.

Standards Focus

The company says FalconX is designed to comply with multi-source agreement standards for "scale-up" and "scale-out" fabric links. It also says the module can be qualified in existing hyperscaler infrastructure, signalling an effort to fit established deployment and validation processes.

The funding and product launch put Xscape Photonics in a fast-moving, competitive segment of AI infrastructure, where optical interconnects and silicon photonics are drawing investment across the supply chain. Start-ups and incumbents are working to increase bandwidth density while managing power and reliability challenges.

Xscape Photonics says the new capital will support continued work on a broader multi-wavelength roadmap under ChromX, which it describes as a programmable multi-wavelength photonics platform for custom AI data centre fabrics.

ChromX Roadmap

FalconX is positioned as a milestone toward higher wavelength counts. Xscape Photonics is targeting 16, 32, and ultimately 128 colours and beyond.

The company also cited earlier prototypes and tools. It says it demonstrated functional 16-colour CombX prototypes in collaboration with Tower Semiconductor, and launched the EagleX Laser Evaluation Kit for the ChromX platform.

Xscape Photonics was founded in 2022 by CEO and Co-Founder Vivek Raghunathan and researchers from Columbia University. The founding team includes Alexander Gaeta (President) and Yoshi Okawachi (Vice President of R&D). Keren Bergman and Michal Lipson serve on the Board of Advisors. Xscape Photonics says it has raised nearly $95 million in total funding to date.

Raghunathan said the company's technology addresses constraints in current AI systems, including how much installed GPU capacity can be used at any one time.

"Rapidly increasing bandwidth, power and cost demands of AI workloads have created a critical hardware bottleneck, forcing developers to use just a fraction of their GPUs' capacity, thereby limiting the revolutionary potential of AI itself," said Raghunathan.

Addition Founder Lee Fixel said the firm sees the timing as favourable for optical laser innovation in AI infrastructure.

"We are proud to support Xscape Photonics in its mission to redefine data center fabrics for the age of AI," said Fixel. "We see this as a compelling opportunity to invest in optical laser innovation at a moment when advanced photonics is becoming critical to AI infrastructure. With innovations like FalconX's eight-wavelength redundant laser and the ChromX roadmap to 128+ colors, Xscape is addressing the bandwidth bottlenecks that constrain AI cluster performance today. The team brings deep engineering expertise and scientific rigor, and we're excited to partner with them as they transform how data moves at AI scale."