Focusability in the multi-pump Raman amplification of short laser pulses

Kirill V. Lezhnin, Kenan Qu, Nathaniel J. Fisch

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


Spatially combining multiple strong laser beams is a promising concept for achieving ultrahigh laser intensities. Proof-of-principle experiments have been conducted at the National Ignition Facility to report a combination of up to 20 pulses with high energy conversion efficiency. However, the combination process might damage the seed focusability due to mismatch of the seed and pump wavefronts. Here, we investigate the effect of the finite pump beam size on the focusability of the seed pulse. We propose an approach to retain and even improve the seed focusability by specifically arranging multiple pump beams. The results are demonstrated by the numerical solution of coupled nonlinear Schrödinger equations. Our findings also apply to seed amplification by filamented pump pulses.

Original languageEnglish (US)
Article number032106
JournalPhysics of Plasmas
Issue number3
StatePublished - Mar 2023

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics


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