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: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
College of Engineering & Physical Sciences
College of Engineering & Physical Sciences > School of Informatics and Digital Engineering > Electrical and Electronic 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
Publication ISSN: 1094-4087
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 (ORCID Profile 0000-0002-5722-0122)
Sugavanam, Srikanth
Wu, Han
Zhang, Wei Li
Dvoyrin, Vladislav (ORCID Profile 0000-0001-7358-1641)
Hu, Tao Ping
Hu, Zhi Jia
Rao, Yun Jiang
Turitsyn, Sergei K. (ORCID Profile 0000-0003-0101-3834)

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