Journal Article

PUBDB-2025-05825

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Ultrashort laser pulse amplified by back-and-forth propagation

Heyl, C. (Corresponding author)DESY* ; Hanna, M.

2025
Nature Publ. Group London [u.a.]

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Please use a persistent id in citations: doi:10.1038/d41586-025-03449-y

Abstract: Ultrashort laser pulses are indispensable tools for sensing and measurement, but it is challenging to generate them at high powers. Quantum mechanics dictates that the more localized a laser pulse is in time, the wider the range of frequencies of its photons — ultrashort laser pulses are said to be ‘broadband’ because of their wide frequency range. The power of ultrashort laser pulses can be increased through amplification, but efficiently amplifying these pulses is difficult. However, in a paper in Nature, Nägele et al.1 report a method that efficiently amplifies a weak, ultrashort laser pulse by overlapping it with a high-power laser pulse. The authors achieved this by bouncing the two pulses back and forth between two mirrors such that they repeatedly passed through a crystal. The mirrors were designed to reduce unwanted mismatch between the pulses, and the researchers demonstrate that this set-up transfers energy to the weaker pulse with high efficiency.

Note: This is a Nature News- and Views article, this means not publication reporting scientific results from DESY. I thus assume that the regular DESY-internal review and approval work flow prior to publication is not needed. Waiting for fulltext

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Contributing Institute(s):

1. Photonics Research and Development (FS-PRI)

Research Program(s):

1. 621 - Accelerator Research and Development (POF4-621) (POF4-621)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2025

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