Thulium fiber lasers with longitudinally modified concentration

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985882%3A_____%2F25%3A00648155" target="_blank" >RIV/67985882:_____/25:00648155 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21340/25:00384365

Výsledek na webu

<a href="https://doi.org/10.1017/hpl.2025.10051" target="_blank" >https://doi.org/10.1017/hpl.2025.10051</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1017/hpl.2025.10051" target="_blank" >10.1017/hpl.2025.10051</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Thulium fiber lasers with longitudinally modified concentration

Popis výsledku v původním jazyce

High-power fiber lasers generate local heat load extremes during their operation, which increase the fiber temperature and lead to adverse thermal effects, such as transverse mode instability or cladding/coating thermal damage. The local temperature extremes are usually located near the end of a fiber where the pump power is delivered. In this paper, longitudinally inhomogeneous doping concentration profiles are applied to reduce the heat load extremes. Utilizing a new degree of freedom, it is shown by both simulations and measurements that the maximal temperature along the fiber can be effectively decreased by using active fibers with an increasing concentration profile in the direction of the pumping power. The concept is studied by a comprehensive numerical model that considers temperature-dependent parameters and is also demonstrated by measurement on an in-house built thulium-doped fiber laser formed by spliced sections with different concentrations. The output power of 54 W with the slope efficiency exceeding 62% was reached

Název v anglickém jazyce

Thulium fiber lasers with longitudinally modified concentration

Popis výsledku anglicky

High-power fiber lasers generate local heat load extremes during their operation, which increase the fiber temperature and lead to adverse thermal effects, such as transverse mode instability or cladding/coating thermal damage. The local temperature extremes are usually located near the end of a fiber where the pump power is delivered. In this paper, longitudinally inhomogeneous doping concentration profiles are applied to reduce the heat load extremes. Utilizing a new degree of freedom, it is shown by both simulations and measurements that the maximal temperature along the fiber can be effectively decreased by using active fibers with an increasing concentration profile in the direction of the pumping power. The concept is studied by a comprehensive numerical model that considers temperature-dependent parameters and is also demonstrated by measurement on an in-house built thulium-doped fiber laser formed by spliced sections with different concentrations. The output power of 54 W with the slope efficiency exceeding 62% was reached

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10306 - Optics (including laser optics and quantum optics)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

High Power Laser Science and Engineering

ISSN

2095-4719

e-ISSN

2052-3289

Svazek periodika

13

Číslo periodika v rámci svazku

JUL 18

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

8

Strana od-do

e71

Kód UT WoS článku

001602872500001

EID výsledku v databázi Scopus

2-s2.0-105011150490