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

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

—

OECD FORD branch

20201 - Electrical and electronic engineering

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

2017

Confidentiality

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

Article name in the collection

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

ISBN

9781510606050

ISSN

0277-786X

e-ISSN

—

Number of pages

7

Pages from-to

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Publisher name

SPIE

Place of publication

Bellingham

Event location

San Francisco

Event date

Jan 28, 2017

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

000402427300058