Tailoring of spatial coherence in a multimode fiber by selectively exciting groups of eigenmodes

Optics Express
Rui MaSergei K Turitsyn

Abstract

Control of the properties of speckle patterns produced by mutual interference of light waves is important for various applications of multimode optical fibers. It has been shown previously that a high signal-to-noise ratio in a multimode fiber can be achieved by preferential excitation of lower order spatial eigenmodes in optical fiber communication. Here we demonstrate that signal spatial coherence can be tailored by changing relative contributions of the lower and higher order multimode fiber eigenmodes for the research of speckle formation and spatial coherence. It is found that higher order spatial eigenmodes are more conducive to the final speckle formation. The minimum speckle contrast occurs in the lower order spatial eigenmodes dominated regime. This work paves the way for control and manipulation of the spatial coherence of light in a multimode fiber varying from partially coherent or totally incoherent light.

References

May 26, 2009·Optics Express·Thomas KaiserMichael Duparré
Mar 10, 2010·Journal of Biomedical Optics·David A Boas, Andrew K Dunn
Dec 15, 1981·Applied Optics·J Saijonmaa, S J Halme
Oct 2, 2013·Optics Letters·M NixonN Davidson
Jan 1, 2012·Nature Photonics·Brandon ReddingHui Cao
Jul 1, 2014·Optics Express·Anatoly Efimov
Nov 25, 2018·Optics Express·Rui MaYun Jiang Rao
Jan 16, 2019·Applied Optics·Luping PanJianping Ding
Apr 2, 2019·Physical Review Letters·E V PodivilovS Wabnitz
May 6, 2019·Optics Express·Rui MaWei Li Zhang

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