Development of Tm-Doped LMA Fibres for High-Power Amplifiers/Lasers Operating in the 2 um Spectral Range

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F25%3A00384648" target="_blank" >RIV/68407700:21340/25:00384648 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1109/CLEO/Europe-EQEC65582.2025.11109376" target="_blank" >https://doi.org/10.1109/CLEO/Europe-EQEC65582.2025.11109376</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1109/CLEO/Europe-EQEC65582.2025.11109376" target="_blank" >10.1109/CLEO/Europe-EQEC65582.2025.11109376</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Development of Tm-Doped LMA Fibres for High-Power Amplifiers/Lasers Operating in the 2 um Spectral Range

Popis výsledku v původním jazyce

Large mode area thulium-doped fibres are essential for high-power fibre laser systems operating in the 2 μm range. They exhibit good quantum efficiency (> 1.9) when pumped by inexpensive semiconductor laser diodes operating at a wavelength of 790 nm, enabling energy-efficient high-power fibre lasers with output powers up to about 1 kW. Heat load, which easily achieves values of several W/cm is the limiting factor. Further power scaling is achievable through in-band pumping of thulium-doped, eventually holmium-doped fibre lasers/amplifiers. While in-band pumped lasers haven't yet reached their full potential, experiments are promising, with slope efficien-cies exceeding 88 % in 100 W, in-band pumped hybrid thulium-doped fibre laser, and 80 % in 35 Wall-fibre holmium-doped fibre laser. For efficient in-band pumping, diode-pumped thulium-doped fibre lasers operating at short wavelengths (1900–1950 nm) are advantageous due to their higher quantum efficiency compared to Raman fiber lasers. The heat load is distributed between the diode-pumped fibre lasers and a highly-efficient high-power in-band pumped laser/amplifier.

Název v anglickém jazyce

Development of Tm-Doped LMA Fibres for High-Power Amplifiers/Lasers Operating in the 2 um Spectral Range

Popis výsledku anglicky

Large mode area thulium-doped fibres are essential for high-power fibre laser systems operating in the 2 μm range. They exhibit good quantum efficiency (> 1.9) when pumped by inexpensive semiconductor laser diodes operating at a wavelength of 790 nm, enabling energy-efficient high-power fibre lasers with output powers up to about 1 kW. Heat load, which easily achieves values of several W/cm is the limiting factor. Further power scaling is achievable through in-band pumping of thulium-doped, eventually holmium-doped fibre lasers/amplifiers. While in-band pumped lasers haven't yet reached their full potential, experiments are promising, with slope efficien-cies exceeding 88 % in 100 W, in-band pumped hybrid thulium-doped fibre laser, and 80 % in 35 Wall-fibre holmium-doped fibre laser. For efficient in-band pumping, diode-pumped thulium-doped fibre lasers operating at short wavelengths (1900–1950 nm) are advantageous due to their higher quantum efficiency compared to Raman fiber lasers. The heat load is distributed between the diode-pumped fibre lasers and a highly-efficient high-power in-band pumped laser/amplifier.

Druh

O - Ostatní výsledky

CEP obor

—

OECD FORD obor

10306 - Optics (including laser optics and quantum optics)

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach<br>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