Multiphoton-Absorption-Excited Up-Conversion Luminescence in Optical Fibers

Fabio Mangini, Mario Ferraro, Mario Zitelli, Alioune Niang, Alessandro Tonello, Vincent Couderc, Stefan Wabnitz

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


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.

Original languageEnglish
Article number054063
Number of pages6
JournalPhysical Review Applied
Issue number5
Publication statusPublished - 24 Nov 2020


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