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

Zhanwei Liu | Zendy; Logan G. Wright | Zendy; Demetrios N. Christodoulides | Zendy; Frank W. Wise | Zendy

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

Author(s) -

Zhanwei Liu,

Logan G. Wright,

Demetrios N. Christodoulides,

Frank W. Wise

Publication year - 2016

Publication title -

optics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.524

H-Index - 272

eISSN - 1071-2763

pISSN - 0146-9592

DOI - 10.1364/ol.41.003675

Subject(s) - optics , multi mode optical fiber , ultrashort pulse , materials science , femtosecond , self focusing , self phase modulation , femtosecond pulse shaping , pulse (music) , kerr effect , beam (structure) , pulse duration , refractive index profile , optical fiber , nonlinear optics , nonlinear system , physics , laser , laser beams , detector , quantum mechanics

We observe a nonlinear spatial self-cleaning process for femtosecond pulses in graded-index (GRIN) multimode fiber (MMF). Pulses with ∼80 fs duration at 1030 nm are launched into GRIN MMF with 62.5 μm core. The near-field beam profile at the output end of the fiber evolves from a speckled pattern to a centered, bell-shaped transverse structure with increasing pulse energy. The experimental observations agree well with numerical simulations, which show that the Kerr nonlinearity underlies the process. This self-cleaning process may find applications in ultrafast pulse generation and beam-combining.

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