Enhanced pump absorption efficiency in coiled and twisted double-clad fibers for fiber lasers

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985882%3A_____%2F19%3A00519192" target="_blank" >RIV/67985882:_____/19:00519192 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21340/19:00339217

Výsledek na webu

<a href="http://dx.doi.org/10.1109/ICTON.2019.8840274" target="_blank" >http://dx.doi.org/10.1109/ICTON.2019.8840274</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1109/ICTON.2019.8840274" target="_blank" >10.1109/ICTON.2019.8840274</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Enhanced pump absorption efficiency in coiled and twisted double-clad fibers for fiber lasers

Popis výsledku v původním jazyce

High-power operation of fiber lasers was mainly enabled by the invention of cladding-pumping in a double-clad fiber structure. Pump absorption is enhanced by broken circular symmetry of inner cladding cross-sections and by mode-scrambling of the pump modes resulting from unconventional fiber coiling. However, theoretical studies were limited to the assumption of a straight fiber until recently, when the rigorous model accounting for double-clad fiber bending and twisting was described. It was found that squeezing of the effective area of the pump radiation due to fiber bending plays an important role in cladding-pump absorption enhancement. We review results of numerical modeling of pump absorption in various types of double-clad fibers, e.g., with cross-section shape of hexagon, stadium, and circle, two-fiber bundle (so-called GTWave fiber structure) a panda fibers are also analyzed. The presented results can have a practical application and potential impact in the construction of fiber lasers: with pump absorption efficiency optimized by our new model (the other models did not take into account fiber twist), the double-clad fiber of shorter length can be used in the fiber lasers and amplifiers. This dramatically minimizes the deleterious effect of background losses and nonlinear effects

Název v anglickém jazyce

Enhanced pump absorption efficiency in coiled and twisted double-clad fibers for fiber lasers

Popis výsledku anglicky

High-power operation of fiber lasers was mainly enabled by the invention of cladding-pumping in a double-clad fiber structure. Pump absorption is enhanced by broken circular symmetry of inner cladding cross-sections and by mode-scrambling of the pump modes resulting from unconventional fiber coiling. However, theoretical studies were limited to the assumption of a straight fiber until recently, when the rigorous model accounting for double-clad fiber bending and twisting was described. It was found that squeezing of the effective area of the pump radiation due to fiber bending plays an important role in cladding-pump absorption enhancement. We review results of numerical modeling of pump absorption in various types of double-clad fibers, e.g., with cross-section shape of hexagon, stadium, and circle, two-fiber bundle (so-called GTWave fiber structure) a panda fibers are also analyzed. The presented results can have a practical application and potential impact in the construction of fiber lasers: with pump absorption efficiency optimized by our new model (the other models did not take into account fiber twist), the double-clad fiber of shorter length can be used in the fiber lasers and amplifiers. This dramatically minimizes the deleterious effect of background losses and nonlinear effects

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

10306 - Optics (including laser optics and quantum optics)

Projekt

<a href="/cs/project/GA19-03141S" target="_blank" >GA19-03141S: Výzkum nových geometrií a uspořádání dvouplášťových aktivních vláken pro vláknové lasery s vysokým výkonem</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název statě ve sborníku

21st International Conference on Transparent Optical Networks, ICTON 2019

ISBN

978-1-7281-2779-8

ISSN

2162-7339

e-ISSN

2161-2064

Počet stran výsledku

4

Strana od-do

Th.B6.1

Název nakladatele

IEEE

Místo vydání

Varšava

Místo konání akce

Angers

Datum konání akce

9. 7. 2019

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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