Spatial Beam Self-Cleaning in Tapered Yb-Doped GRIN Multimode Fiber with Decelerating Nonlinearity

Alioune Niang, Daniele Modotto, Alessandro Tonello, Fabio Mangini, Umberto Minoni, Mario Zitelli, Marc Fabert, Mesay Addisu Jima, O. N. Egorova, Andrey E. Levchenko, Sergei L. Semjonov, Denis S. Lipatov, Sergey Babin, Vincent Couderc, Stefan Wabnitz

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

We experimentally demonstrate spatial beam self-cleaning in an Yb-doped graded-index multimode fiber taper, both in passive and active configurations. The input laser beam at 1064 nm was injected for propagation from the small to the large core side of the taper, with laser diode pumping in a counterdirectional configuration. The Kerr effect permits to obtain high-beam quality amplification with no accompanying frequency conversions. As a result, our nonlinear taper amplifier may provide an important building block for multimode fiber lasers and amplifiers.

Original languageEnglish
Article number6500308
Number of pages9
JournalIEEE Photonics Journal
Volume12
Issue number2
DOIs
Publication statusPublished - Apr 2020

Keywords

  • Fiber nonlinear optics
  • optical fiber amplifiers
  • QUALITY
  • CAVITY
  • SUPERCONTINUUM GENERATION
  • INTERFERENCE

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