7-Rod-Core Thulium-Doped Fiber for Enhanced Fiber Laser Cooling
Ivo Barto\v{n}, Jan Aubrecht, Bara \v{S}vejkarov\'a, Jan Pokorn\'y, Michal Kamr\'adek, Ond\v{r}ej Podrazk\'y, Petr Va\v{r}'ak, Ivan Ka\v{s}'ik, Martin Gr\'abner, Pavel Peterka
TL;DR
This paper presents a novel 7-rod-core thulium-doped fiber designed to improve fiber laser cooling by reducing heat load and enabling efficient, pedestal-free operation at specific wavelengths, demonstrated through promising experimental results.
Contribution
The work introduces a structured-core fiber design that enhances laser cooling efficiency and demonstrates high slope efficiencies at targeted wavelengths.
Findings
Achieved 52% slope efficiency at 1907 nm
Achieved 54% slope efficiency at 1940 nm
Demonstrated pedestal-free fiber laser cooling performance
Abstract
Structured-core thulium-doped fibers were developed to reduce heat load, enable shorter-wavelength operation, and achieve a pedestal-free design. In a proof-of-principle experiment, laser slope efficiencies of 52% at 1907 nm and 54% at 1940 nm were achieved with respect to absorbed power.
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Taxonomy
TopicsOptical properties and cooling technologies in crystalline materials · Photonic Crystal and Fiber Optics · Heat Transfer Mechanisms