Spectroscopy and lasing of Tm:SrMoO4 crystal near 1.5, 1.9, and 2.3 μm under 793 nm excitation

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F18%3A00324040" target="_blank" >RIV/68407700:21340/18:00324040 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1117/12.2289513" target="_blank" >http://dx.doi.org/10.1117/12.2289513</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1117/12.2289513" target="_blank" >10.1117/12.2289513</a>

Result language

angličtina

Original language name

Spectroscopy and lasing of Tm:SrMoO4 crystal near 1.5, 1.9, and 2.3 μm under 793 nm excitation

Original language description

The spectroscopy properties and lasing of diode pumped Tm-doped strontium molybdate SrMoO4 single crystal were investigated at room temperature. The Tm:SrMoO4 crystal was grown by the Czochralski method in air (2 wt.% of TmNbO4 in the melt). The tested Tm:SrMoO4 sample was cut from the grown crystal boule perpendicularly to growth direction (100). For spectroscopy and laser experiments 4.2 mm thick plane-parallel face-polished plate (without AR coatings) was used. A fiber-coupled laser diode operating at wavelength 793 nm was used for longitudinal Tm:SrMoO4 pumping which corresponds to H-3(4) level excitation. Fluorescence spectra measurement showed strong emission in vicinity of 1.8 mu m (F-3(4) -> H-3(6) transition), and also significant emission close to wavelengths 1.45 mu m (H-3(4) -> F-3(4) transition) and 2.31.1.m (H-3(4) -> H-3(5) transition). The lasing was successfully reached for all these three transitions and output characteristics were measured. The pumping laser diode was operating in the pulsed regime with a low duty cycle. The 145 mm long semi-hemispherical laser resonator consisted of flat pumping mirror (HT @ 0.79 mu m) and curved (r = 150 mm) output coupler. For each lasing transition the particular set of resonator mirrors was used to reach high reflexivity of pumping mirror and output coupler transmission 0.5 % at laser operation wavelength. The obtained laser emission wavelengths were 1.95 mu m, 1.45 & 1.49 mu m, and 2.30 mu m. In spite of low laser slope efficiency in respect to absorbed pumping power (0.45 % for H-3(4) -> F-3(4) transition, 0.50 % for F-3(4) -> H-3(6) transition and 0.83 % for H-3(4) -> H-3(5) transition), results obtained are promising for further development of diode-pumped laser at 2.3 mu m spectral region.

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/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

2018

Confidentiality

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

Article name in the collection

Proc. SPIE 10511 Solid State Lasers XXVII: Technology and Devices

ISBN

978-1-5106-1507-6

ISSN

0277-786X

e-ISSN

—

Number of pages

8

Pages from-to

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Publisher name

SPIE

Place of publication

Bellingham

Event location

San Francisco

Event date

Jan 27, 2018

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

000432463600050