Thulium fiber lasers with longitudinally modified concentration
The result's identifiers
Result code in 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>
Alternative codes found
RIV/68407700:21340/25:00384365
Result on the web
<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>
Alternative languages
Result language
angličtina
Original language name
Thulium fiber lasers with longitudinally modified concentration
Original language description
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
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10306 - Optics (including laser optics and quantum optics)
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
High Power Laser Science and Engineering
ISSN
2095-4719
e-ISSN
2052-3289
Volume of the periodical
13
Issue of the periodical within the volume
JUL 18
Country of publishing house
GB - UNITED KINGDOM
Number of pages
8
Pages from-to
e71
UT code for WoS article
001602872500001
EID of the result in the Scopus database
2-s2.0-105011150490