Beam self-cleaning in tapered ytterbium-doped multimode fiber with decelerating nonlinearity
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Niang A., Modotto D., Tonello A., Mangini F., Minoni U., Fabert M., Jima M. A., Egorova O. N., Levchenko A. E., Semjonov S. L., Lipatov D. S., Couderc V., Wabnitz S.
We demonstrate Kerr self-cleaning of beams in an Ytterbium doped multimode fiber taper with exponentially decreasing nonlinearity, with no accompanying frequency conversion or spectral broadening.