Celero Communications has secured $275 million in Series C funding at a valuation exceeding $3 billion, bringing its total capital raised since its 2024 founding to $415 million. The Irvine, California-based networking chip startup develops coherent digital signal processors for fiber-optic links used in AI data centers. Atreides Management, Valor Equity Partners and CapitalG, Alphabet's venture capital arm, led the round, while existing investors Sutter Hill Ventures and Maverick Silicon also participated. Gavin Baker, Managing Partner and Chief Investment Officer at Atreides Management, will join Celero's board. Alongside the financing, Celero said it had validated what it described as the industry's first 2nm coherent DSP silicon, covering DSP processing and advanced analog technology for optical interconnects supporting data rates from 1.6T through 3.2T. The company plans to use the capital to advance its product roadmap, research and development, and production readiness. Celero is targeting cloud companies as AI infrastructure expands and traditional PAM4 optical architectures face increasing limits in bandwidth density and fiber scalability.