Temperature dependence of Fe:ZnSe mid-infrared spectral and laser output properties under ~4 μm radiation excitation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F24%3A00377857" target="_blank" >RIV/68407700:21340/24:00377857 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1364/JOSAB.532238" target="_blank" >https://doi.org/10.1364/JOSAB.532238</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1364/JOSAB.532238" target="_blank" >10.1364/JOSAB.532238</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Temperature dependence of Fe:ZnSe mid-infrared spectral and laser output properties under ~4 μm radiation excitation

Popis výsledku v původním jazyce

This paper presents the temperature dependence of the spectroscopic and laser properties of the Fe2+:ZnSe single crystal under excitation by radiation at a wavelength of similar to 4.04 um. Excitation was supported by the Er:YAG laser (similar to 2.94 um) operated in the Q-switched or free-running (FR) mode that pumped the Fe:ZnSe laser cooled by liquid nitrogen to 78 K. This system generated radiation at the wavelength of similar to 4.04 um. Temperature dependence of absorption, fluorescence spectra, and fluorescence decay time of Fe2+ ions was measured. The optimal temperature that allows efficient Fe:ZnSe laser system operation with maximum laser output energy was sought in both regimes. It was characterized at a repetition rate of 1Hz with pulse durations of similar to 175 ns and similar to 155 mu s in both modes, respectively. The highest laser output energies obtained with the crystal placed in the cryostat in gain-switched (GS) and FR modes were similar to 385 mu J at 260 K and similar to 374 mu J at 190 K, respectively. Maximum optical-to-optical efficiencies in the same modes were similar to 13% at 260 K and similar to 32% at 170 K, respectively. Wide laser radiation oscillation spectra depending on the temperature ranging from similar to 4.3 um at 140 K to similar to 4.9 um at 340 K obtained with a Gaussianlike beam spatial profile were demonstrated. Under atmospheric conditions at RT, this laser system reached a pulse energy of over 0.5 mJ at similar to 4.78 um in similar to 135 ns pulses, which corresponds to a peak power of similar to 3.9 kW.

Název v anglickém jazyce

Temperature dependence of Fe:ZnSe mid-infrared spectral and laser output properties under ~4 μm radiation excitation

Popis výsledku anglicky

This paper presents the temperature dependence of the spectroscopic and laser properties of the Fe2+:ZnSe single crystal under excitation by radiation at a wavelength of similar to 4.04 um. Excitation was supported by the Er:YAG laser (similar to 2.94 um) operated in the Q-switched or free-running (FR) mode that pumped the Fe:ZnSe laser cooled by liquid nitrogen to 78 K. This system generated radiation at the wavelength of similar to 4.04 um. Temperature dependence of absorption, fluorescence spectra, and fluorescence decay time of Fe2+ ions was measured. The optimal temperature that allows efficient Fe:ZnSe laser system operation with maximum laser output energy was sought in both regimes. It was characterized at a repetition rate of 1Hz with pulse durations of similar to 175 ns and similar to 155 mu s in both modes, respectively. The highest laser output energies obtained with the crystal placed in the cryostat in gain-switched (GS) and FR modes were similar to 385 mu J at 260 K and similar to 374 mu J at 190 K, respectively. Maximum optical-to-optical efficiencies in the same modes were similar to 13% at 260 K and similar to 32% at 170 K, respectively. Wide laser radiation oscillation spectra depending on the temperature ranging from similar to 4.3 um at 140 K to similar to 4.9 um at 340 K obtained with a Gaussianlike beam spatial profile were demonstrated. Under atmospheric conditions at RT, this laser system reached a pulse energy of over 0.5 mJ at similar to 4.78 um in similar to 135 ns pulses, which corresponds to a peak power of similar to 3.9 kW.

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

2024

Kód důvěrnosti údajů

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

Název periodika

Journal of the Optical Society of America

ISSN

0740-3224

e-ISSN

1520-8540

Svazek periodika

41

Číslo periodika v rámci svazku

12

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

7

Strana od-do

"E8"-"E14"

Kód UT WoS článku

001301046000002

EID výsledku v databázi Scopus

2-s2.0-85210899516