Mode-field adapter for tapered-fiber-bundle signal and pump combiners

0448946 - ÚFE 2016 RIV US eng J - Journal Article
Koška, Pavel - Baravets, Yauhen - Peterka, Pavel - Bohata, J. - Písařík, M.
Mode-field adapter for tapered-fiber-bundle signal and pump combiners.
Applied Optics. Roč. 54, č. 4 (2015), s. 751-756. ISSN 1559-128X. E-ISSN 2155-3165
R&D Projects: GA ČR(CZ) GAP205/11/1840; GA MPO FR-TI4/734
Institutional support: RVO:67985882
Keywords : Fibers * Dopant diffusion * Input and outputs
Subject RIV: JA - Electronics ; Optoelectronics, Electrical Engineering
Impact factor: 1.598, year: 2015

We report on a novel mode-field adapter that is proposed to be incorporated inside tapered fused-fiberbundle pump and signal combiners for high-power double-clad fiber lasers. Such an adapter allows optimization of signal-mode-field matching on the input and output fibers. Correspondingly, losses of the combiner signal branch are significantly reduced. The mode-field adapter optimization procedure is demonstrated on a combiner based on commercially available fibers. Signal wavelengths of 1.55 and 2 μm are considered. The losses can be further improved by using specially designed intermediate fiber and by dopant diffusion during splicing as confirmed by preliminary experimental results
Permanent Link: http://hdl.handle.net/11104/0250532