Temperature influence on diode-pumped Tm:SrF2-CaF2 laser properties

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F17%3A00315742" target="_blank" >RIV/68407700:21340/17:00315742 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1117/12.2251973" target="_blank" >http://dx.doi.org/10.1117/12.2251973</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1117/12.2251973" target="_blank" >10.1117/12.2251973</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Temperature influence on diode-pumped Tm:SrF2-CaF2 laser properties

Popis výsledku v původním jazyce

The goal of this work was an investigation of the temperature influence (in range 77 - 300 K) on laser properties of Tm: SrF2-CaF2 solid-solution, which is suitable as a gain medium for generation of radiation at 1.8-2 mu m. The tested Tm: SrF2-CaF2 sample (60 mol% CaF2, 38 mol% SrF2) was doped with 2 mol% of TmF3. The diameter of the grown boule was 10 mm. The sample was cut and optically polished parallel to growing axis. The polished sample thickness was 8.5 mm. It was fixed in temperature controlled cupreous holder, placed inside vacuum chamber of the liquid nitrogen cryostat. A fiber coupled laser diode, operating in pulsed regime (10 ms pulse length, 10 Hz repetition rate) at wavelength 764 nm, was used for longitudinal sample pumping. The 142 mm long semi-hemispherical laser cavity consisted of flat pumping mirror (HR @ 1.8 - 2.0 mu m, HT @ 0.77 1 mu m) and curved (r = 150 mm) output coupler with a reflectivity of similar to 92% @ 1.8 - 2.0 mu m. From the results it follows that the temperature of the active medium has a strong influence on laser slope efficiency. The highest slope efficiency (42% in respect to absorbed power), obtained for temperature 77 K, was more than fi ve times higher than slope efficiency for 300 K. The threshold decreased twice with the temperature lowering from 300 to 77 K. Laser output power amplitude 5.5 W at wavelength 1856 nm was reached for absorbed power 15.8 W at 77 K.

Název v anglickém jazyce

Temperature influence on diode-pumped Tm:SrF2-CaF2 laser properties

Popis výsledku anglicky

The goal of this work was an investigation of the temperature influence (in range 77 - 300 K) on laser properties of Tm: SrF2-CaF2 solid-solution, which is suitable as a gain medium for generation of radiation at 1.8-2 mu m. The tested Tm: SrF2-CaF2 sample (60 mol% CaF2, 38 mol% SrF2) was doped with 2 mol% of TmF3. The diameter of the grown boule was 10 mm. The sample was cut and optically polished parallel to growing axis. The polished sample thickness was 8.5 mm. It was fixed in temperature controlled cupreous holder, placed inside vacuum chamber of the liquid nitrogen cryostat. A fiber coupled laser diode, operating in pulsed regime (10 ms pulse length, 10 Hz repetition rate) at wavelength 764 nm, was used for longitudinal sample pumping. The 142 mm long semi-hemispherical laser cavity consisted of flat pumping mirror (HR @ 1.8 - 2.0 mu m, HT @ 0.77 1 mu m) and curved (r = 150 mm) output coupler with a reflectivity of similar to 92% @ 1.8 - 2.0 mu m. From the results it follows that the temperature of the active medium has a strong influence on laser slope efficiency. The highest slope efficiency (42% in respect to absorbed power), obtained for temperature 77 K, was more than fi ve times higher than slope efficiency for 300 K. The threshold decreased twice with the temperature lowering from 300 to 77 K. Laser output power amplitude 5.5 W at wavelength 1856 nm was reached for absorbed power 15.8 W at 77 K.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20201 - Electrical and electronic engineering

Projekt

<a href="/cs/project/GA15-05360S" target="_blank" >GA15-05360S: Vliv teploty na spektroskopické a laserové vlastnosti pevnolátkových aktivních materiálů pro viditelnou až střední infračervenou oblast</a><br>

Návaznosti

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

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proc. SPIE 10082 Solid State Lasers XXVI: Technology and Devices

ISBN

9781510606050

ISSN

0277-786X

e-ISSN

—

Počet stran výsledku

7

Strana od-do

—

Název nakladatele

SPIE

Místo vydání

Bellingham

Místo konání akce

San Francisco

Datum konání akce

28. 1. 2017

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000402427300058