Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.

End cap splicing of photonic crystal fibers with outstanding quality for high-power applications

: Böhme, Steffen; Fabian, Simone; Schreiber, Thomas; Eberhardt, Ramona; Tünnermann, Andreas


Bachmann, F.G. (Ed.) ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Laser-based Micro- and Nanopackaging and Assembly VI : San Francisco, California, USA, January 2012
Bellingham, WA: SPIE, 2012 (Proceedings of SPIE 8244)
ISBN: 978-0-8194-8887-9
Paper 824406
Conference "Laser-Based Micro- and Nanopackaging and Assembly" <6, 2012, San Francisco/Calif.>
Fraunhofer IOF ()
CO2-Laser; fusion splicing; end cap; PCF

The application of photonic crystal fibers (PCF), especially in high power fiber laser systems, requires special preparation technologies with some significant differences compared to standard fibers. Features, like air-clad structures, highly rare-earth doped cores with low NA and stress applying parts of the PCFs, require additional steps in fiber preparation and innovative splicing technologies to gain optical properties. Here we discuss a contamination- free carbon dioxide laser splicing device, which is used for defined air-clad collapsing and end cap splicing to get a stable and sealed fiber end face with preserved high beam quality and additional functionality. The special design of the computer-controlled laser splicing process provides a versatile tool with high reproducibility for joining different geometries with an adjustable well-balanced heat distribution. A wide range of PCFs with different diameters, air-clad structures and doped materials up to ~2 mm have been spliced. For selected PCF-end cap splices cleave or polishing requirements as well as results on beam quality, tensile strength and further splicing features are presented.