https://cdn.gophotonics.com/news/cvc_639160826730695823.webp712370

Covesion, a specialist in periodically poled lithium niobate (PPLN) technology and nonlinear optical solutions, has developed fiber-coupled frequency conversion systems that enable efficient laser wavelength generation across the visible, near-infrared, and mid-infrared spectrum. The technology is designed to simplify the integration of nonlinear optical processes into laser systems while delivering stable and reliable wavelength conversion for scientific, industrial, and emerging quantum technology applications.

The company’s fiber-coupled frequency conversion platform is based on its proprietary PPLN crystal technology, which is widely used for nonlinear optical processes such as second-harmonic generation (SHG), sum-frequency generation (SFG), difference-frequency generation (DFG), and optical parametric generation. These processes allow laser light to be converted from one wavelength to another, enabling access to spectral regions that are difficult or impractical to reach using conventional laser sources alone.

Unlike traditional free-space frequency conversion setups that require precise optical alignment, Covesion’s solution integrates optical fiber coupling directly with the nonlinear conversion stage. This approach significantly reduces alignment complexity, improves system robustness, and enables wavelength conversion technology to be deployed in compact and user-friendly laser platforms. The fiber-coupled architecture also enhances long-term operational stability by minimizing sensitivity to vibration and environmental disturbances.

At the heart of the system are temperature-controlled PPLN crystals optimized for efficient nonlinear interactions. Precise thermal management is essential for maintaining phase-matching conditions within the crystal, ensuring high conversion efficiency and stable output wavelengths. By integrating temperature control with fiber-coupled optics, Covesion provides a turnkey solution that simplifies deployment while maintaining the performance benefits of advanced nonlinear optical materials.

The technology enables laser manufacturers and system developers to generate custom wavelengths for a broad range of applications. In spectroscopy and sensing, frequency conversion can produce wavelengths that correspond to specific molecular absorption features, improving measurement sensitivity and selectivity. In biomedical and scientific research, access to specialized wavelengths supports advanced imaging, diagnostics, and analytical techniques.

Covesion also sees strong potential for the technology in quantum photonics, where stable wavelength conversion plays a critical role in connecting different quantum systems and enabling efficient transmission of quantum information. Fiber-coupled nonlinear conversion modules can help bridge wavelength gaps between quantum light sources, detectors, and communication networks while maintaining a compact and scalable system architecture.

The platform is compatible with a variety of laser sources and can be tailored to application-specific wavelength requirements. This flexibility allows system designers to extend the capabilities of existing laser technologies without the need to develop entirely new laser architectures, reducing development time and complexity. By combining nonlinear optical frequency conversion, precision thermal control, and fiber-optic integration within a compact package, Covesion’s fiber-coupled frequency conversion technology provides a practical route to generating application-specific wavelengths for spectroscopy, sensing, quantum technologies, biomedical research, and advanced photonics systems.