Tunable Cr2+,Fe2+:Zn1-xMnxSe (x = 0.05) and (x = 0.3) lasers around 4.4 μm at 78 K pumped by a 1.94 μm Tm:fiber laser via Cr2+ -> Fe2+ energy transfer

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F20%3A00343991" target="_blank" >RIV/68407700:21340/20:00343991 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1117/12.2542819" target="_blank" >https://doi.org/10.1117/12.2542819</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1117/12.2542819" target="_blank" >10.1117/12.2542819</a>

Result language

angličtina

Original language name

Tunable Cr2+,Fe2+:Zn1-xMnxSe (x = 0.05) and (x = 0.3) lasers around 4.4 μm at 78 K pumped by a 1.94 μm Tm:fiber laser via Cr2+ -> Fe2+ energy transfer

Original language description

New laser applications as medicine treatment, air pollutants measurement, free-space communications, target illumination, and industrial technologies require laser radiation in the mid-infrared region of 4-6 mu m where Fe2+-based lasers can generate. Pumping of Fe2+-doped active material is usually provided by sources generating near 3 mu m (as YAG:Er, Er-fiber, or ZnSe:Cr) fitting the Fe2+ absorption maximum. Other promising pumping way is the energy transfer from Cr2+ to Fe2+ in co-doped materials. This energy transfer process in gain-switched operation under 200 ns, 1.73 mu m pulse excitation was reported recently. In this paper we would like to present 1 ms, 10 Hz laser operation of the Zn1-xMnxSe:Fe2+,Cr2+ (x = 0.3) crystal within the 78-110 K temperature range under 1.94 mu m commercial Tm:fiber laser pumping. The active crystal was placed in the cryostat and the cavity was formed by a curved dichroic pumping mirror and a curved output coupler. The slope efficiency of 1 % was achieved for 1.94 mu m pumping at 78 K. The central laser output wavelength at 78 K was similar to 4.45 mu m and the output spectrum temperature shift was about 2 nm/K. Furthermore, tunability range over 300 nm (4.35-4.67 mu m) obtained at 78 K using intracavity tuning element. The results will be compared to an analogous Zn1-xMnxSe:Fe2+ (x = 0.3) crystal in a gain-switched mode under Q-switched YAG:Er3+ 2.94 mu m laser pumping. Moreover, laser generation of crystals with different Mn concentration and CW generation will be also presented.

Czech name

—

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

2020

Confidentiality

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

Article name in the collection

Proc. SPIE 11259 Solid State Lasers XXIX: Technology and Devices

ISBN

978-1-5106-3281-3

ISSN

0277-786X

e-ISSN

—

Number of pages

7

Pages from-to

—

Publisher name

SPIE

Place of publication

Bellingham

Event location

San Francisco, CA

Event date

Feb 1, 2020

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

000568169600029