Passively Q-switched Er,La:SrF2-CaF2 Laser at 2.74 μm

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F19%3A00334044" target="_blank" >RIV/68407700:21340/19:00334044 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1117/12.2520268" target="_blank" >http://dx.doi.org/10.1117/12.2520268</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1117/12.2520268" target="_blank" >10.1117/12.2520268</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Passively Q-switched Er,La:SrF2-CaF2 Laser at 2.74 μm

Popis výsledku v původním jazyce

The free-running and passive Q-switched laser properties of Er,La:SrF2-CaF2 crystal, that is appropriate for generation at 2.74 μm, are presented. The sample of Er,La:SrF2-CaF2 (composition 4 wt.% of ErF3, 12 wt.% of LaF3, 77 wt.% of CaF2, and 7 wt.% of SrF2, thickness 8.2 mm) had plan-parallel polished faces without anti-reflection coatings. The excitation of Er,La:SrF2-CaF2 was carried out by a 975 nm laser diode radiation in pulsed (pulse duration 1 ms, repetition rate 10 Hz) and CW mode. Laser resonator was hemispherical, 10 mm or 45 mm in length with flat pumping mirror (HR @ 2.7 μm) and spherical output coupler (r = 50 mm, R = 97.5 % or R = 95 % @ 2.5-2.8 μm). For CW mode of operation of Er,La:SrF2-CaF2 the highest obtained slope efficiency was 20.2 %. The maximum output power 0.35 W was achieved in this case. With semiconductor saturable absorber (SESAM) in laser resonator the shortest pulse duration of 33.4 ns with repetition rate 50 kHz was obtained. The maximal pulse energy 5.4 μJ with peak power 122 W was reached for 44.2 ns pulse duration. Since the emitted laser wavelength 2.74 μm is relatively close to absorption peak of water located at 3 μm, one of the Er,La:SrF2-CaF2 laser possible usage should be in medicine and spectroscopy.

Název v anglickém jazyce

Passively Q-switched Er,La:SrF2-CaF2 Laser at 2.74 μm

Popis výsledku anglicky

The free-running and passive Q-switched laser properties of Er,La:SrF2-CaF2 crystal, that is appropriate for generation at 2.74 μm, are presented. The sample of Er,La:SrF2-CaF2 (composition 4 wt.% of ErF3, 12 wt.% of LaF3, 77 wt.% of CaF2, and 7 wt.% of SrF2, thickness 8.2 mm) had plan-parallel polished faces without anti-reflection coatings. The excitation of Er,La:SrF2-CaF2 was carried out by a 975 nm laser diode radiation in pulsed (pulse duration 1 ms, repetition rate 10 Hz) and CW mode. Laser resonator was hemispherical, 10 mm or 45 mm in length with flat pumping mirror (HR @ 2.7 μm) and spherical output coupler (r = 50 mm, R = 97.5 % or R = 95 % @ 2.5-2.8 μm). For CW mode of operation of Er,La:SrF2-CaF2 the highest obtained slope efficiency was 20.2 %. The maximum output power 0.35 W was achieved in this case. With semiconductor saturable absorber (SESAM) in laser resonator the shortest pulse duration of 33.4 ns with repetition rate 50 kHz was obtained. The maximal pulse energy 5.4 μJ with peak power 122 W was reached for 44.2 ns pulse duration. Since the emitted laser wavelength 2.74 μm is relatively close to absorption peak of water located at 3 μm, one of the Er,La:SrF2-CaF2 laser possible usage should be in medicine and 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

2019

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proc. SPIE 11033, High-Power, High-Energy, and High-Intensity Laser Technology IV

ISBN

978-1-5106-2732-1

ISSN

0277-786X

e-ISSN

1996-756X

Počet stran výsledku

6

Strana od-do

—

Název nakladatele

SPIE

Místo vydání

Bellingham

Místo konání akce

Praha

Datum konání akce

1. 4. 2019

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000483017000008