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

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F16%3A00304676" target="_blank" >RIV/68407700:21340/16:00304676 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1117/12.2208569" target="_blank" >http://dx.doi.org/10.1117/12.2208569</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1117/12.2208569" target="_blank" >10.1117/12.2208569</a>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

JA - Electronics and optoelectronics

OECD FORD branch

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Project

<a href="/en/project/GA15-05360S" target="_blank" >GA15-05360S: Temperature influence on spectroscopic and lasing characteristics of solid-state materials covering spectral range from visible up to mid-infrared</a><br>

Continuities

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

Publication year

2016

Confidentiality

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

Article name in the collection

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

ISBN

978-1-62841-961-0

ISSN

0277-786X

e-ISSN

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Number of pages

7

Pages from-to

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Publisher name

SPIE

Place of publication

Bellingham (stát Washington)

Event location

San Francisco

Event date

Feb 13, 2016

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

000383765300035