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.
Multiphoton-absorption-excited up-conversion luminescence in optical fibers / Mangini, Fabio; Ferraro, Mario; Zitelli, Mario; Niang, Alioune; Tonello, Alessandro; Couderc, Vincent; Wabnitz, Stefan. - In: PHYSICAL REVIEW APPLIED. - ISSN 2331-7019. - 14:5(2020), pp. 1-6. [10.1103/PhysRevApplied.14.054063]
Multiphoton-absorption-excited up-conversion luminescence in optical fibers
Mangini, Fabio;Ferraro, Mario;Zitelli, Mario;Wabnitz, Stefan
2020
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.File | Dimensione | Formato | |
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