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### Electronic data

• observation-laser-power

Rights statement: © 2018 American Physical Society

Accepted author manuscript, 1.06 MB, PDF document

• 1710.05337v2

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## Observation of laser power amplification in a self-injecting laser wakefield accelerator

Research output: Contribution to journalJournal article

Published
• M. J. V. Streeter
• S. Kneip
• M. S. Bloom
• R. A. Bendoyro
• O. Chekhlov
• A. E. Dangor
• A. Döpp
• C. J. Hooker
• J. Holloway
• J. Jiang
• N. C. Lopes
• H. Nakamura
• P. A. Norreys
• C. A. J. Palmer
• P. P. Rajeev
• J. Schreiber
• D. R. Symes
• M. Wing
• S. P. D. Mangles
• Z. Najmudin
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Article number 254801 22/06/2018 Physical review letters 25 120 6 Published English

### Abstract

We report on the depletion and power amplification of the driving laser pulse in a strongly-driven laser wakefield accelerator. Simultaneous measurement of the transmitted pulse energy and temporal shape indicate an increase in peak power from $187 \pm 11$TW to a maximum of $318 \pm 12$ TW after 13 mm of propagation in plasma density of $0.9 \times 10^{18}$ cm$^{-3}$. The power amplification is correlated with the injection and acceleration of electrons in the non-linear wakefield. This process is modeled by including localized redshifting and subsequent group delay dispersion at the laser pulse front.