Efficient pump absorption in twisted double clad thulium-doped fibers drawn of CO2 laser shaped preform

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F19%3A00339218" target="_blank" >RIV/68407700:21340/19:00339218 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1109/CLEOE-EQEC.2019.8871910" target="_blank" >https://doi.org/10.1109/CLEOE-EQEC.2019.8871910</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1109/CLEOE-EQEC.2019.8871910" target="_blank" >10.1109/CLEOE-EQEC.2019.8871910</a>

Result language
angličtina
Original language name
Efficient pump absorption in twisted double clad thulium-doped fibers drawn of CO2 laser shaped preform
Original language description
High power fiber lasers can benefit from the tailored pump absorption along the active fiber. The higher pump absorption mitigates the nonlinear effects thanks to shorter laser resonators. On the other hand it is often beneficial to decrease the pump absorption near pump injection locations. Based on recently reported rigorous theoretical description of the mode mixing in double-clad fibers, promising concepts of new fiber geometries and layouts for tailoring the pump absorption have been outlined. The new concepts shall finally result in highly efficient lasers of a small footprint and reduced need for cooling that shall have a great potential for applications where low power consumption, tightly limited space and low weight are required. One of the concepts was based on twisted double-clad fiber. It was successfully demonstrated for Tm-doped double-clad fiber that was twisted after drawing. In this work we report for the first time fabrication and absorption measurements of Tm-doped double-clad fiber that was spun during the drawing so that the twist remain frozen in the drawn fiber.
Czech name
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Czech description
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Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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