Highlights

• Fraunhofer Institute is developing alternative materials and production techniques for laser systems to address geopolitical risks in rare-earth element supply chains.
• Researchers are creating advanced laser crystals and fiber-optic components with precision manufacturing to enhance technological independence.
• The initiative aims to reclaim control over critical technologies and ensure European leadership in high-tech innovation through strategic laser technology development.

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In an age where lasers power everything from advanced manufacturing systems to life-saving medical devices and emerging quantum technologies, the backbone of modern innovation is becoming alarmingly fragile. This vulnerability stems from an increasing dependence on rare-earth elements and specialized laser crystals, many of which are sourced from politically volatile regions. The recent customs disputes with China have starkly illustrated how this dependency can threaten not just economic resilience but national security and technological sovereignty across Europe.

According to their June 2 press release (opens in a new tab), the Fraunhofer Institute for Optronics, System Technologies (opens in a new tab), and Image Exploitation (IOSB) is taking decisive steps to address this risk. Based in Ettlingen and Oberkochen, the institute is pioneering research into alternative materials and production techniques for laser systems. Their work, which spans everything from crystal simulation to fiber fabrication, will be showcased at the LASER trade show in Munich from June 24 to 27.

Lasers rely on precisely engineered crystals that amplify light and release it at specific wavelengths. These crystals are typically doped with rare-earth elements, whose availability is now uncertain due to export controls and geopolitical tensions. Without reliable access to these materials, industries that depend on lasers—from semiconductor manufacturing to defense—face serious constraints.

Marc Eichhorn, director of Fraunhofer IOSB, emphasizes that maintaining the ability to produce and process these critical components domestically is about more than just industrial competitiveness. It’s about control over technology, over innovation, and over security. “Guaranteeing the availability of adequate laser crystals and fibers and having control over their processing is vital not only for the competitiveness and independence of the German and European economies but also for our security,” Eichhorn said.

Leading the charge on technical innovation is Christelle Kieleck, head of the institute’s Laser Technology department. Her team is focused on developing new, more powerful laser crystals and fiber-optic components. They simulate, grow, and refine these crystals with exacting precision—work that combines high-performance computing with artisanal processing techniques. The crystals are not only grown in carefully controlled furnaces but also meticulously examined for their optical and thermal properties. These parameters are crucial, as even slight imperfections or inefficiencies can significantly degrade laser performance.

A particular area of focus is the development of nonlinear optical (NLO) materials, which enable the manipulation of laser wavelengths. These materials can shift laser emissions into safer or more application-specific spectral ranges, thereby enhancing their usefulness in fields such as medical diagnostics, environmental monitoring, and even eye-safe distance measurement systems.

One of the most significant challenges in working with these materials is the manufacturing process itself. “A great deal of expertise is required. Many processes cannot be automated,” says Kieleck. After growing, the raw crystals must be cut, ground, polished, and often microstructured—a series of steps that require both scientific knowledge and craftsmanship. The goal is not only to create effective laser media but also to enhance their resilience to high-energy use. A new test station at the institute now enables researchers to accurately determine the optical damage threshold of various materials, an important metric for real-world applications.

Beyond solid-state lasers, Fraunhofer IOSB is also breaking new ground in the field of fiber lasers. These use glass fibers doped with rare-earth elements as the active medium to generate laser light. The team is working to produce customized optical fibers tailored for specific industrial and medical uses, especially in the short-wave and mid-infrared spectrum. At the institute’s new Oberkochen site, researchers are developing robust, lightweight, high-performance fibers suited to compact systems with tight energy constraints.

As supply chains grow more complex and less reliable, efforts like these are crucial to ensuring that Germany and Europe remain leaders in high-tech innovation. The LASER trade show will offer visitors a glimpse into this cutting-edge work, with Fraunhofer IOSB presenting a range of its breakthroughs—from advanced crystal technologies to state-of-the-art fiber lasers.

Ultimately, the work being done at Fraunhofer IOSB is not just about pushing the frontiers of laser technology. It is a strategic initiative to reclaim control over critical technologies, reduce dependence on unstable markets, and secure a future where innovation is driven not by necessity, but by possibility.