Preform and Fiber Technology for High-Power Lasers


Development of a technologically closed process chain for the production of special fibers with the aim of an economic and reliable process of fibers for scientific and industrial applications.


  • Laser-active preforms and fibers with variable geometries (e.g. 20 μm laseractive core, 400 μm pump core)
  • Optimization of the composition regarding maximum pump absorption with low photodarkenin
  • Design and preparation of micro-structured large core fibers with low numerical aperture in the laser-active area


Development of monolithic fiber lasers with output powers in the kW range, an outstanding beam quality, and a compact, maintenance-free and hard-wearing construction.


  • Modified Chemical Vapor Deposition (MCVD) with laser-active cores by
    - solution doping
    - gaseous phase deposition
  • Fiber drawing technology

Closely cooperating with

Leibniz Institute of Photonic Technology