Shaping the light amplified in a multimode fiber

Light, Science & Applications
Raphaël FlorentinJean-Pierre Huignard

Abstract

Propagation of light in multimode optical fibers usually gives a spatial and temporal randomization of the transmitted field similar to the propagation through scattering media. Randomization still applies when scattering or multimode propagation occurs in gain media. We demonstrate that appropriate structuration of the input beam wavefront can shape the light amplified by a rare-earth-doped multimode fiber. Profiling of the wavefront was achieved by a deformable mirror in combination with an iterative optimization process. We present experimental results and simulations showing the shaping of a single sharp spot at different places in the output cross-section of an ytterbium-doped fiber amplifier. Cleaning and narrowing of the amplifier far-field pattern was realized as well. Tailoring the wavefront to shape the amplified light can also serve to improve the effective gain. The shaping approach still works under gain saturation, showing the robustness of the method. Modeling and experiments attest that the shaping is effective even with a highly multimode fiber amplifier carrying up to 127 modes.

References

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Citations

Jul 7, 2019·Nature Communications·Wen XiongHui Cao
Sep 5, 2020·Light, Science & Applications·Xiaoming WeiLihong V Wang
May 3, 2018·Optics Express·Raphaël FlorentinAlain Barthelemy
Nov 22, 2018·Nature Communications·Benjamin WetzelRoberto Morandotti
Mar 12, 2019·Light, Science & Applications·Lei GongYin-Mei Li
Nov 7, 2019·Optics Express·Raphael FlorentinAlain Barthelemy
Sep 23, 2018·Nature Communications·Sreekanth PerumbilavilGaetano Assanto
May 3, 2018·Optics Express·Walter FuFrank W Wise
Mar 7, 2019·Light, Science & Applications·Wen XiongHui Cao
Aug 12, 2020·Nature Communications·Di LinDavid J Richardson
Mar 23, 2021·Physical Review Letters·Yihang DingChangxi Yang
Sep 20, 2019·The Journal of Physical Chemistry Letters·Ayumi IshiiTsutomu Miyasaka
Aug 27, 2021·Light, Science & Applications·Xiaoming WeiLihong V Wang
Oct 9, 2020··Zachary M. ZieglerDemetrios N. Christodoulides
May 8, 2019··Andrei IsichenkoLogan G. Wright
Jun 28, 2018··V. KermeneA. Desfarges-Berthelemot

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