Preform and Fiber Technology for High-Power Lasers

Motivation

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.

Characteristics

• 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

Application

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.

Technology

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