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Demonstration of >5kW emissions with good beam quality from two different 7:1 all-glass fiber coupler-types

 
: Plötner, Marco; Eschrich, T.; Vries, Oliver de; Kobelke, J.; Unger, S.; Jäger, M.; Schreiber, Thomas; Bartel, H.; Eberhardt, Ramona; Tünnermann, Andreas

:

Glebov, A.L. (Ed.) ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Components and Packaging for Laser Systems : 9-12 February 2015, San Francisco, California
Bellingham, WA: SPIE, 2015 (Proceedings of SPIE 9346)
ISBN: 978-1-62841-436-3
Paper 93460W, 5 pp.
Conference "Components and Packaging for Laser Systems" <2015, San Francisco/Calif.>
English
Conference Paper
Fraunhofer IOF ()

Abstract
We report on two low-loss 7:1 single-mode to multi-mode fiber coupler-designs generating more than 5 kW of output power. These all-glass fiber-optical devices have the objective to keep the brightness at its theoretical maximum and the heat load at its technical minimum. To the best of our knowledge, regarding all-fiber geometrical combined power generation, beam quality and heat stability, the presented results had never been reported before.

: http://publica.fraunhofer.de/documents/N-341387.html