K2 Photonics secures Seed Funding to simplify frequency comb technology for global industries
24.11.2025
K2 Photonics, an ETH Zurich spin-off, has closed its seed funding round, paving the way for broader deployment of its laser and frequency comb technology across industrial and scientific sectors. The company aims to make this advanced technology more practical and accessible for a range of applications worldwide.
 K2 Photonics founding team: Justinas Pupeikis, Benjamin Willenberg, Prof. Ursula Keller, and Lukas Lang
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The seed round was led by Paeonia Group, a Singapore-based investment holding company providing strategic support for global expansion and access to international markets. The funding will accelerate the development and scaling of K2 Photonics’ laser systems, which leverage advances in laser physics and noise optimization within femtosecond oscillators. These innovations allow passive stability, reducing reliance on complex control systems and simplifying integration for industrial users.
Frequency combs—precise tools for measuring time and frequency—are critical in applications such as environmental monitoring, semiconductor characterization, metrology, and quantum timing systems. Historically, frequency comb solutions were large, expensive, and difficult to deploy. K2 Photonics addresses these challenges by offering compact laser modules and measurement sub-systems that maintain high-quality light properties while lowering barriers to integration.
The company has already established installations across four continents and completed proof-of-concept demonstrations in multiple application areas. Its core laser technology is well-established and designed for efficient scaling, supporting rapid adoption across diverse industries.
“Venture Kick supported us in shaping a solid business case during the early days and provided access to a strong network that helped us navigate the Swiss startup ecosystem effectively,” highlighted CEO Justinas Pupeikis.
K2 Photonics team: CEO Justinas Pupeikis, CTO Benjamin Willenberg, Scientific Advisor Professor Ursula Keller, and Head of Hardware Lukas Lang
Frequency combs—precise tools for measuring time and frequency—are critical in applications such as environmental monitoring, semiconductor characterization, metrology, and quantum timing systems. Historically, frequency comb solutions were large, expensive, and difficult to deploy. K2 Photonics addresses these challenges by offering compact laser modules and measurement sub-systems that maintain high-quality light properties while lowering barriers to integration.
The company has already established installations across four continents and completed proof-of-concept demonstrations in multiple application areas. Its core laser technology is well-established and designed for efficient scaling, supporting rapid adoption across diverse industries.
“Venture Kick supported us in shaping a solid business case during the early days and provided access to a strong network that helped us navigate the Swiss startup ecosystem effectively,” highlighted CEO Justinas Pupeikis.
K2 Photonics team: CEO Justinas Pupeikis, CTO Benjamin Willenberg, Scientific Advisor Professor Ursula Keller, and Head of Hardware Lukas Lang