期刊
OPTICS EXPRESS
卷 27, 期 17, 页码 24018-24028出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.27.024018
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资金
- Xcore research foundation
- French program 364 Investissement d'Avenir [ANR-15 IDEX-0003, ISITE-BFC-299365]
- European Research Council (ERC) [740355]
- CILAS company (Ariangroup)
- Russian Science Foundation (RSF) [17-13-01343]
- Russian Science Foundation [17-13-01343] Funding Source: Russian Science Foundation
We experimentally demonstrate spatial beam self-cleaning and supercontinuum generation in a tapered Ytterbium-doped multimode optical fiber with parabolic core refractive index profile when 1064 nm pulsed beams propagate from wider (122 mu m) into smaller (37 mu m) diameter. In the passive mode, increasing the input beam peak power above 20 kW leads to a bell-shaped output beam profile. In the active configuration, gain from the pump laser diode permits to combine beam self-cleaning with supercontinuum generation between 520-2600 nm. By taper cut-back, we observed that the dissipative landscape, i. e., a non-monotonic variation of the average beam power along the MMF, leads to modal transitions of self-cleaned beams along the taper length. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.
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