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

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.

Publication DOI: https://doi.org/10.1364/OE.394350
Divisions: Engineering & Applied Sciences > Aston Institute of Photonics Technology
Engineering & Applied Sciences
Engineering & Applied Sciences > Electrical, Electronic & Power Engineering
Additional Information: © 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
Uncontrolled Keywords: Atomic and Molecular Physics, and Optics
Full Text Link:
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
https://www.osa ... =oe-28-14-20587 (Publisher URL)
PURE Output Type: Article
Published Date: 2020-06-26
Accepted Date: 2020-06-20
Authors: Ma, Rui
Zhang, Hua Hui
Manuylovich, Egor
Sugavanam, Srikanth
Wu, Han
Zhang, Wei Li
Dvoyrin, Vladislav ( 0000-0001-7358-1641)
Hu, Tao Ping
Hu, Zhi Jia
Rao, Yun Jiang
Turitsyn, Sergei K. ( 0000-0003-0101-3834)

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