Measurements of self-guiding of ultrashort laser pulses over long distances

K. Poder, J. M. Cole, J. C. Wood, S. Alatabi, P. S. Foster, C. Kamperidis, O. Kononenko, C A. Palmer, D. Rusby, A. Sahai, Gianluca Sarri, D.R. Symes, J. R. Warwick, S.P.D. Mangles, Z. Najmudin

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Abstract

We report on the evaluation of the performance of self-guiding over extended distances with f /20 and f /40 focussing geometries. Guiding over 39 mm or more than 100 Rayleigh ranges was observed with the f /20 optic at ne = 1.5 × 1018 cm−3 . Analysis of guiding performance found that the extent of the exiting laser spatial mode closely followed the matched spot size predicted by 3D non-linear theory. Self-guiding with an f /40 optic was also characterised, with guided modes observed for a plasma length of 90 mm and a plasma density of ne = 9.5 × 1017 cm−3 . This corresponds to self-guided propagation over 53 Rayleigh ranges and is similar to distances obtained with discharge plasma channel guiding.
Original languageEnglish
Article number014022
Number of pages6
JournalPlasma Physics and Controlled Fusion
Volume60
Issue number1
DOIs
Publication statusPublished - 31 Oct 2017

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