Effect of cryogenic temperature on spectroscopic and laser properties of Er,La:SrF2-CaF2 crystal

Kód výsledku v IS VaVaI

RIV/68407700:21340/16:00304676 - isvavai.cz

Výsledek na webu

http://dx.doi.org/10.1117/12.2208569

DOI - Digital Object Identifier

10.1117/12.2208569

Jazyk výsledku

angličtina

Název v původním jazyce

Effect of cryogenic temperature on spectroscopic and laser properties of Er,La:SrF2-CaF2 crystal

Popis výsledku v původním jazyce

The laser and spectroscopic properties of crystal Er,La:SrF2-CaF2 at temperature range 80 - 300 K, which is appropriate for generation of radiation around 2.7 um is presented. The sample of Er,La:SrF2-CaF2 (concentration Er(0.04), La(0.12):Ca(0.77)Sr(0.07)) had plan-parallel face-polished faces without anti-reection coatings (thickness 8.2 mm). During spectroscopy and laser experiments the Er,La:SrF2-CaF2 was attached to temperature controlled copper holder and it was placed in vacuum chamber. The transmission and emission spectra of Er,La:SrF2-CaF2 together with the uorescence decay time were measured in dependence on temperature. The excitation of Er,La:SrF2-CaF2 was carried out by a laser diode radiation (pulse duration 5 ms, repetition rate 20 Hz, pump wavelength 973 nm). Laser resonator was hemispherical, 140 mm in length with at pumping mirror (HR @ 2.7 _m) and spherical output coupler (r = 150 mm, R = 95 % @ 2.5 - 2.8 _m). Tunability of laser at 80 K in range 2690 - 2765 nm was obtained using MgF2 birefringent _lter. With decreasing temperature of sample the uorescence lifetime of manifold 4I11=2 (upper laser level) became shorter and intensity of up-conversion radiation was increasing. The highest slope e_ciency with respect to absorbed power was 2.3 % at 80 K. The maximum output of peak amplitude power was 0.3 W at 80 K, i.e. 1.5 times higher than measured this value at 300 K. The wavelength generated by Er,La:SrF2-CaF2 laser (2.7 _m) is relatively close to absorption peak of water (3 _m) and so, one of the possible usage should be in medicine and spectroscopy.

Název v anglickém jazyce

Effect of cryogenic temperature on spectroscopic and laser properties of Er,La:SrF2-CaF2 crystal

Popis výsledku anglicky

The laser and spectroscopic properties of crystal Er,La:SrF2-CaF2 at temperature range 80 - 300 K, which is appropriate for generation of radiation around 2.7 um is presented. The sample of Er,La:SrF2-CaF2 (concentration Er(0.04), La(0.12):Ca(0.77)Sr(0.07)) had plan-parallel face-polished faces without anti-reection coatings (thickness 8.2 mm). During spectroscopy and laser experiments the Er,La:SrF2-CaF2 was attached to temperature controlled copper holder and it was placed in vacuum chamber. The transmission and emission spectra of Er,La:SrF2-CaF2 together with the uorescence decay time were measured in dependence on temperature. The excitation of Er,La:SrF2-CaF2 was carried out by a laser diode radiation (pulse duration 5 ms, repetition rate 20 Hz, pump wavelength 973 nm). Laser resonator was hemispherical, 140 mm in length with at pumping mirror (HR @ 2.7 _m) and spherical output coupler (r = 150 mm, R = 95 % @ 2.5 - 2.8 _m). Tunability of laser at 80 K in range 2690 - 2765 nm was obtained using MgF2 birefringent _lter. With decreasing temperature of sample the uorescence lifetime of manifold 4I11=2 (upper laser level) became shorter and intensity of up-conversion radiation was increasing. The highest slope e_ciency with respect to absorbed power was 2.3 % at 80 K. The maximum output of peak amplitude power was 0.3 W at 80 K, i.e. 1.5 times higher than measured this value at 300 K. The wavelength generated by Er,La:SrF2-CaF2 laser (2.7 _m) is relatively close to absorption peak of water (3 _m) and so, one of the possible usage should be in medicine and spectroscopy.

Druh

D - Stať ve sborníku

CEP obor

JA - Elektronika a optoelektronika, elektrotechnika

OECD FORD obor

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Projekt

GA15-05360S: Vliv teploty na spektroskopické a laserové vlastnosti pevnolátkových aktivních materiálů pro viditelnou až střední infračervenou oblast

Návaznosti

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

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proc. SPIE 9726, Solid State Lasers XXV: Technology and Devices

ISBN

978-1-62841-961-0

ISSN

0277-786X

e-ISSN

—

Počet stran výsledku

7

Strana od-do

—

Název nakladatele

SPIE

Místo vydání

Bellingham (stát Washington)

Místo konání akce

San Francisco

Datum konání akce

13. 2. 2016

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000383765300035