Brillouin interaction between single optical modes excited in multimode fibers

Andrei A. Fotiadi; Edik Rafailov; Dmitry Korobko; Ivan Chapalo; Patrice Mégret; Alexander Bykov; Igor Meglinski

doi:10.1117/12.2665904

31 May 2023 Brillouin interaction between single optical modes excited in multimode fibers

Andrei A. Fotiadi, Edik Rafailov, Dmitry Korobko, Ivan Chapalo, Patrice Mégret, Alexander Bykov, Igor Meglinski

Proceedings Volume 12572, Optical Sensors 2023; 125721L (2023) https://doi.org/10.1117/12.2665904
Event: SPIE Optics + Optoelectronics, 2023, Prague, Czech Republic

Conference Poster

Abstract

A multimode optical fiber supports excitation and propagation of a pure single optical mode, i.e., the field pattern that satisfies the boundary conditions and does not change along the fiber. When two counterpropagating pure optical modes are excited, they could interact through the stimulated Brillouin scattering (SBS) process. Here, we present a simple theoretical formalism describing SBS interaction between two individual optical modes selectively excited in an acoustically isotropic multimode optical fiber. Employing a weakly guiding step-index fiber approach, we have built an analytical expression for the spatial distribution of the sound field amplitude in the fiber core and explored the features of SBS gain spectra, describing the interaction between modes of different orders. In this way, we give a clear insight into the sound propagation effects accompanying SBS in multimode optical fibers, and demonstrate their specific contributions to the SBS gain spectrum.

Citation Download Citation

Andrei A. Fotiadi, Edik Rafailov, Dmitry Korobko, Ivan Chapalo, Patrice Mégret, Alexander Bykov, and Igor Meglinski "Brillouin interaction between single optical modes excited in multimode fibers", Proc. SPIE 12572, Optical Sensors 2023, 125721L (31 May 2023); https://doi.org/10.1117/12.2665904

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