Spatial beam cleanup by pure Kerr processes in multimode fibers

Jesper Lægsgaard*

*Corresponding author for this work

    Research output: Contribution to journalJournal articleResearchpeer-review


    Recent experiments with pulse propagation in multimode graded-index fibers have shown a nonlinear improvement in beam quality, even in situations where dissipative processes such as Raman scattering play no significant role. In this Letter, numerical simulations of beam cleanup by third-order Kerr nonlinearities in a multimode fiber are used to demonstrate that in the absence of dissipative processes beam cleanup is crucially dependent on spectral/temporal disorder and does not occur in a continuous-wave model. This finding is in accordance with fundamental considerations on entropy. (C) 2018 Optical Society of America
    Original languageEnglish
    JournalOptics Letters
    Issue number11
    Pages (from-to)2700-2703
    Publication statusPublished - 2018


    • Optoelectronic devices
    • Beam cleanup
    • Continuous Wave
    • Dissipative process
    • Graded-index fibers
    • Kerr nonlinearity
    • Pulse propagation
    • Spatial beams
    • Third order
    • Multimode fibers
    • Light, Optics and Optical Devices


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