Abstract

We report on a comprehensive experimental investigation into the spatial–spectral complexity of the laser beam during Kerr-induced beam self-cleaning in graded-index multimode fibers. We demonstrate the self-cleaning of beams using both transform-limited and chirped femtosecond pulses. By utilizing the spectrally resolved imaging technique, we examine variations in beam homogeneity during the beam cleanup process and reveal correlations observed among spatial beam profiles at different wavelengths for the various cleaned pulses. Our results significantly advance our understanding of Kerr-induced self-cleaning with chirped ultrafast pulses and offer new possibilities for diverse applications.

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Kerr self-cleaning of femtosecond-pulsed beams in graded-index multimode fiber

Zhanwei Liu, Logan G. Wright, Demetrios N. Christodoulides, and Frank W. Wise
Opt. Lett. 41(16) 3675-3678 (2016)

Nonlinear polarization dynamics of Kerr beam self-cleaning in a graded-index multimode optical fiber

Katarzyna Krupa, Graciela Garmendia Castañeda, Alessandro Tonello, Alioune Niang, Denis S. Kharenko, Marc Fabert, Vincent Couderc, Guy Millot, Umberto Minoni, Daniele Modotto, and Stefan Wabnitz
Opt. Lett. 44(1) 171-174 (2019)

Weak beam self-cleaning of femtosecond pulses in the anomalous dispersion regime

Yuhang Wu, Hamed Pourbeyram, Demetrios N. Christodoulides, and Frank W. Wise
Opt. Lett. 46(13) 3312-3315 (2021)

High-temperature wave thermalization spoils beam self-cleaning in nonlinear multimode GRIN fibers

Fabio Mangini, Mario Ferraro, Alessandro Tonello, Vincent Couderc, and Stefan Wabnitz
Opt. Lett. 48(18) 4741-4744 (2023)

Interplay of Kerr and Raman beam cleaning with a multimode microstructure fiber

R. Dupiol, K. Krupa, A. Tonello, M. Fabert, D. Modotto, S. Wabnitz, G. Millot, and V. Couderc
Opt. Lett. 43(3) 587-590 (2018)