Spatio-temporal couplings for controlling group velocity in longitudinally pumped seeded soft X-ray lasers

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F23%3A00583131" target="_blank" >RIV/61389021:_____/23:00583131 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.nature.com/articles/s41566-023-01165-5#data-availability" target="_blank" >https://www.nature.com/articles/s41566-023-01165-5#data-availability</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/s41566-023-01165-5" target="_blank" >10.1038/s41566-023-01165-5</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Spatio-temporal couplings for controlling group velocity in longitudinally pumped seeded soft X-ray lasers

Popis výsledku v původním jazyce

Controlling the group velocity of an ultrashort laser pulse by means of spatio-temporal couplings has been proposed to overcome the inherent limitations in laser–plasma interactions. Here we report how this method improves the performance of a seeded soft X-ray laser (SXRL), which intrinsically suffers from group velocity mismatch between the infrared pump beam, used to generate the plasma amplifier, and the soft X-ray seed beam. The energy extraction was measured to be three times higher when the pump group velocity varied from 0.55c to 1.05c. We also demonstrate that the SXRL pulse duration is governed by the pump beam velocity. By compensating the natural group velocity mismatch, the SXRL pulse duration can be kept constant along its propagation, resulting in energetic pulses (up to 2 μJ) as short as 350 fs. Such achievements constitute an experimental demonstration of the so-called ‘flying focus effect’ in an application by controlling the group velocity of a high-intensity laser pulse propagating in a plasma.

Název v anglickém jazyce

Spatio-temporal couplings for controlling group velocity in longitudinally pumped seeded soft X-ray lasers

Popis výsledku anglicky

Controlling the group velocity of an ultrashort laser pulse by means of spatio-temporal couplings has been proposed to overcome the inherent limitations in laser–plasma interactions. Here we report how this method improves the performance of a seeded soft X-ray laser (SXRL), which intrinsically suffers from group velocity mismatch between the infrared pump beam, used to generate the plasma amplifier, and the soft X-ray seed beam. The energy extraction was measured to be three times higher when the pump group velocity varied from 0.55c to 1.05c. We also demonstrate that the SXRL pulse duration is governed by the pump beam velocity. By compensating the natural group velocity mismatch, the SXRL pulse duration can be kept constant along its propagation, resulting in energetic pulses (up to 2 μJ) as short as 350 fs. Such achievements constitute an experimental demonstration of the so-called ‘flying focus effect’ in an application by controlling the group velocity of a high-intensity laser pulse propagating in a plasma.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10306 - Optics (including laser optics and quantum optics)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Nature Photonics

ISSN

1749-4885

e-ISSN

1749-4893

Svazek periodika

17

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

6

Strana od-do

354-359

Kód UT WoS článku

000942696700001

EID výsledku v databázi Scopus

2-s2.0-85149120398