@article{83b957c8e92f403abe96746e76ad5f46,
title = "Multiphoton-Absorption-Excited Up-Conversion Luminescence in Optical Fibers",
abstract = "We experimentally demonstrate a previously unforeseen nonlinear effect in optical fibers: up-conversion luminescence generation excited by multiphoton absorption of femtosecond infrared pulses. We directly estimate the average number of photons involved in the up-conversion process, by varying the wavelength of the pump source. We highlight the role of nonbridging oxygen hole centers and oxygen-deficient center defects and directly compare the intensity of side-scattered luminescence with numerical simulations of pulse propagation.",
author = "Fabio Mangini and Mario Ferraro and Mario Zitelli and Alioune Niang and Alessandro Tonello and Vincent Couderc and Stefan Wabnitz",
note = "Funding Information: We acknowledge support from the European Research Council (ERC) under the European Union{\textquoteright}s Horizon 2020 research and innovation program (Grants No. 740355 and No. 874596) and the Russian Ministry of Science and Education (Grant No. 14.Y26.31.0017). Publisher Copyright: {\textcopyright} 2020 American Physical Society. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.",
year = "2020",
month = nov,
day = "24",
doi = "10.1103/PhysRevApplied.14.054063",
language = "English",
volume = "14",
journal = "Physical Review Applied",
issn = "2331-7019",
publisher = "American Physical Society",
number = "5",
}