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Proceedings Paper

Optimized mode-field adapter for low-loss fused fiber bundle signal and pump combiners
Author(s): Pavel Koška; Yauhen Baravets; Pavel Peterka; Michael Písařík; Jan Bohata
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Paper Abstract

In our contribution we report novel mode field adapter incorporated inside bundled tapered pump and signal combiner. Pump and signal combiners are crucial component of contemporary double clad high power fiber lasers. Proposed combiner allows simultaneous matching to single mode core on input and output. We used advanced optimization techniques to match the combiner to a single mode core simultaneously on input and output and to minimalize losses of the combiner signal branch. We designed two arrangements of combiners’ mode field adapters. Our numerical simulations estimates losses in signal branches of optimized combiners of 0.23 dB for the first design and 0.16 dB for the second design for SMF-28 input fiber and SMF-28 matched output double clad fiber for the wavelength of 2000 nm. The splice losses of the actual combiner are expected to be even lower thanks to dopant diffusion during the splicing process.

Paper Details

Date Published: 4 March 2015
PDF: 7 pages
Proc. SPIE 9344, Fiber Lasers XII: Technology, Systems, and Applications, 93442I (4 March 2015); doi: 10.1117/12.2079905
Show Author Affiliations
Pavel Koška, Institute of Photonics and Electronics of the ASCR, v.v.i. (Czech Republic)
Czech Technical Univ. in Prague (Czech Republic)
Yauhen Baravets, Institute of Photonics and Electronics of the ASCR, v.v.i. (Czech Republic)
Czech Technical Univ. in Prague (Czech Republic)
Pavel Peterka, Institute of Photonics and Electronics of the ASCR, v.v.i. (Czech Republic)
Michael Písařík, Czech Technical Univ. in Prague (Czech Republic)
Jan Bohata, Czech Technical Univ. in Prague (Czech Republic)


Published in SPIE Proceedings Vol. 9344:
Fiber Lasers XII: Technology, Systems, and Applications
L. Brandon Shaw, Editor(s)

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