Open AccessExperimental observation of self-imaging in SMF-28 optical fibers
Author(s) -
Fabio Mangini,
Mario Ferraro,
Mario Zitelli,
A. Niang,
Alessandro Tonello,
Vincent Couderc,
Oleg Sidelnikov,
Fabrizio Frezza,
Stefan Wabnitz
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.419472
Subject(s) - optics , materials science , femtosecond , optical fiber , excited state , wavelength , single mode optical fiber , beam (structure) , fiber , infrared , photoluminescence , optoelectronics , laser , physics , atomic physics , composite material
Spatial self-imaging, consisting of the periodic replication of the optical transverse beam profile along the propagation direction, can be achieved in guided wave systems when all excited modes interfere in phase. We exploited material defects photoluminescence for directly visualizing self-imaging in a few-mode, nominal singlemode SMF-28 optical fiber. Visible luminescence was excited by intense femtosecond infrared pulses via multiphoton absorption processes. Our method permits us to determine the mode propagation constants and the cutoff wavelength of transverse fiber modes.