Tunable Cryogenic Tm:CaF2-SrF2 Laser

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F19%3A00334050" target="_blank" >RIV/68407700:21340/19:00334050 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1117/12.2520808" target="_blank" >http://dx.doi.org/10.1117/12.2520808</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1117/12.2520808" target="_blank" >10.1117/12.2520808</a>

Result language
angličtina
Original language name
Tunable Cryogenic Tm:CaF2-SrF2 Laser
Original language description
We present temperature influence (from 78 to 300,K) on tuning and laser properties of thulium doped solid solution CaF2-SrF2 crystal). The sample was 8.5 mm thick Tm:CaF2SrF2 block cut and face polished parallel to growing axis without any AR coating. The composition of sample was 60 mol% CaF2, 38 mol% SrF2 doped with 2 mol% TmF3. The sample was mounted in temperature controlled copper holder of the liquid nitrogen cryostat. The 148mm long semi-hemispherical laser resonator consisted of flat pumping mirror placed inside cryostat, and curved output coupler placed outside. For longitudinal pumping a fiber coupled laser diode was used. The diode was operating in the pulse mode at wavelength 763 nm. The 2mm thick MgF2 birefringent filter was placed at Brewster angle inside the resonator for laser wavelength tuning. With decreasing temperature the output oscillation wavelength shifted to shorter wavelength and range of tunability decreased from 117nm at 300K to 89nm at 100K following the fluorescence spectrum narrowing. The overall tunability was from 1795nm at 79K to 1944nm at 300 K. The highest output pulse energy 6.8mJ with slope efficiency 10% was obtained at 1814nm for T = 78 K. The temperature of Tm:CaF2SrF2 was found to have significant influence on laser output wavelength and tunability.
Czech name
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Czech description
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Project
<a href="/en/project/GA18-11954S" target="_blank" >GA18-11954S: Optimization of the solid-state laser active materials for spectral range from near- up to mid-infrared</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
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
Number of pages
6
Pages from-to
—
Publisher name
SPIE
Place of publication
Bellingham
Event location
Praha
Event date
Apr 1, 2019
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
000483017000019

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