Pulse duration of a partially coherent soft X-ray laser estimated from far-field speckle statistics

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F18%3A00503515" target="_blank" >RIV/61389021:_____/18:00503515 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378271:_____/18:00501435 RIV/68407700:21340/18:00325936

Výsledek na webu

<a href="http://dx.doi.org/10.1364/OL.43.004586" target="_blank" >http://dx.doi.org/10.1364/OL.43.004586</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1364/OL.43.004586" target="_blank" >10.1364/OL.43.004586</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Pulse duration of a partially coherent soft X-ray laser estimated from far-field speckle statistics

Popis výsledku v původním jazyce

A novel method for estimating the pulse duration of partially coherent soft X-ray pulses from a far-field intensity pattern is presented. The method is based on intensity statistics at a single point in space and time, which allows the number of coherent longitudinal modes to be measured. Utilizing the knowledge of the coherence time of the radiation, either from the measurement of the spectral bandwidth or from numerical simulations, the duration of each individual pulse can be evaluated. This method was used to estimate the pulse duration of the laser-driven nickel-like molybdenum soft X-ray laser that is based on amplified spontaneous emission from a narrow plasma column and emits at a wavelength of 18.9 nm. By varying the length of the gain medium, a clear dependence of the number of modes caused mainly by the spectral line narrowing was observed. Supported by simulations of radiative transfer and pulse propagation, the pulse duration at the end of a 3 mm long gain medium was estimated to be 3.5 ps. The experimental data from far-field intensity patterns were also analyzed by applying the generalized van Cittert–Zernike theorem, pro-viding a lower bound of effective source size.

Název v anglickém jazyce

Pulse duration of a partially coherent soft X-ray laser estimated from far-field speckle statistics

Popis výsledku anglicky

A novel method for estimating the pulse duration of partially coherent soft X-ray pulses from a far-field intensity pattern is presented. The method is based on intensity statistics at a single point in space and time, which allows the number of coherent longitudinal modes to be measured. Utilizing the knowledge of the coherence time of the radiation, either from the measurement of the spectral bandwidth or from numerical simulations, the duration of each individual pulse can be evaluated. This method was used to estimate the pulse duration of the laser-driven nickel-like molybdenum soft X-ray laser that is based on amplified spontaneous emission from a narrow plasma column and emits at a wavelength of 18.9 nm. By varying the length of the gain medium, a clear dependence of the number of modes caused mainly by the spectral line narrowing was observed. Supported by simulations of radiative transfer and pulse propagation, the pulse duration at the end of a 3 mm long gain medium was estimated to be 3.5 ps. The experimental data from far-field intensity patterns were also analyzed by applying the generalized van Cittert–Zernike theorem, pro-viding a lower bound of effective source size.

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

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Optics Letters

ISSN

0146-9592

e-ISSN

—

Svazek periodika

43

Číslo periodika v rámci svazku

19

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

4

Strana od-do

4586-4589

Kód UT WoS článku

000446024300010

EID výsledku v databázi Scopus

2-s2.0-85054071130