Temperature influence on Er:GGAG crystal spectroscopic properties and its lasing at 3 μm m

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F20%3A00343986" target="_blank" >RIV/68407700:21340/20:00343986 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1117/12.2541965" target="_blank" >https://doi.org/10.1117/12.2541965</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1117/12.2541965" target="_blank" >10.1117/12.2541965</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Temperature influence on Er:GGAG crystal spectroscopic properties and its lasing at 3 μm m

Popis výsledku v původním jazyce

The spectroscopic and laser properties of Er:GGAG active medium, in temperature range from 80 K to 300 K, are presented in this work. The sample of Er:GGAG (20 at. % of Er3+) crystal had face-polished plan-parallel faces without anti-reflection coatings (thickness 3.6 mm). During all experiments the Er:GGAG was attached to temperature controlled copper holder and it was placed in a vacuum chamber. The transmission and emission spectra together with the fluorescence decay time were measured depending on temperature. The excitation of Er:GGAG was carried out by a fibre-coupled laser diode radiation (pulse duration 2 ms, repetition rate 25 Hz, wavelength 964 nm). Laser resonator was hemispherical, 100 mm in length with flat pumping mirror (HR @ 2.95 mu m) and a spherical output coupler (r = 100 mm, R = 97.5 % @ 2.65 - 2.95 mu m). The tunability of laser at 300 K was tested using MgF2 birefringent filter and several laser lines at several spectral bands 2800 - 2822 nm, 2829 - 2891 nm, and 2917 - 2942 nm were obtained. The fluorescence decay time of manifold I-4(11/2) (upper laser level) is slightly increasing with rising temperature from 482 mu s (80 K) to 466 mu s (300 K) on the other hand the intensity of up-conversion radiation was increasing with decreasing temperature. In the pulsed laser regime, the highest slope efficiency with respect to absorbed energy 9 % and the maximum output energy 2.6 mJ were reached at 5 % duty cycle. The laser radiation generated by Er:GGAG laser (2.94 mu m) is close to the absorption peak of water (3 mu m) thus this wavelength can be used in medicine or spectroscopy.

Název v anglickém jazyce

Temperature influence on Er:GGAG crystal spectroscopic properties and its lasing at 3 μm m

Popis výsledku anglicky

The spectroscopic and laser properties of Er:GGAG active medium, in temperature range from 80 K to 300 K, are presented in this work. The sample of Er:GGAG (20 at. % of Er3+) crystal had face-polished plan-parallel faces without anti-reflection coatings (thickness 3.6 mm). During all experiments the Er:GGAG was attached to temperature controlled copper holder and it was placed in a vacuum chamber. The transmission and emission spectra together with the fluorescence decay time were measured depending on temperature. The excitation of Er:GGAG was carried out by a fibre-coupled laser diode radiation (pulse duration 2 ms, repetition rate 25 Hz, wavelength 964 nm). Laser resonator was hemispherical, 100 mm in length with flat pumping mirror (HR @ 2.95 mu m) and a spherical output coupler (r = 100 mm, R = 97.5 % @ 2.65 - 2.95 mu m). The tunability of laser at 300 K was tested using MgF2 birefringent filter and several laser lines at several spectral bands 2800 - 2822 nm, 2829 - 2891 nm, and 2917 - 2942 nm were obtained. The fluorescence decay time of manifold I-4(11/2) (upper laser level) is slightly increasing with rising temperature from 482 mu s (80 K) to 466 mu s (300 K) on the other hand the intensity of up-conversion radiation was increasing with decreasing temperature. In the pulsed laser regime, the highest slope efficiency with respect to absorbed energy 9 % and the maximum output energy 2.6 mJ were reached at 5 % duty cycle. The laser radiation generated by Er:GGAG laser (2.94 mu m) is close to the absorption peak of water (3 mu m) thus this wavelength can be used in medicine or spectroscopy.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20201 - Electrical and electronic engineering

Projekt

<a href="/cs/project/GA18-11954S" target="_blank" >GA18-11954S: Optimalizace pevnolátkových aktivních materiálů pro blízkou a střední infračervenou spektrální oblast</a><br>

Návaznosti

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

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proc. SPIE 11259 Solid State Lasers XXIX: Technology and Devices

ISBN

978-1-5106-3281-3

ISSN

0277-786X

e-ISSN

—

Počet stran výsledku

6

Strana od-do

—

Název nakladatele

SPIE

Místo vydání

Bellingham

Místo konání akce

San Francisco, CA

Datum konání akce

1. 2. 2020

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000568169600040