Simulations of Pump Absorption in Tandem-Pumped Octagon Double-Clad Fibers
Citation
Grábner, M., Nithyanandan, K., Peterka, P., Koška, P., Jasim, A. A., & Honzátko, P. (2021). Simulations of Pump Absorption in Tandem-Pumped Octagon Double-Clad Fibers. IEEE Photonics Journal, 13(2), 1500314. https://doi.org/10.1109/JPHOT.2021.3060857
Keywords
- Double-clad fiber
- Finite element beam propagation
- Pump absorption
- Fiber laser
- Cladding pumping
- Octagonal shape (of inner cladding)
- Fiber coiling
- Fiber twisting
- Tandem pumping
- Holmium-doped fiber
- Numerical simulation
- Mode scrambling
- Bending radius
- Twisting rate
- Pump efficiency
- Skew-ray modes
- Pump delivery fiber
- Excitation field
- Cross-section area (of inner cladding)
- High power fiber lasers
Brief
This article presents numerical simulations investigating the impact of fiber coiling and twisting on pump absorption in octagon double-clad fibers with varying geometries and pump excitation fields, relevant for tandem-pumped fiber lasers.
Summary
This paper presents numerical simulations using the finite element beam propagation method to investigate how fiber coiling and twisting affect pump absorption in octagon-shaped double-clad fibers for tandem-pumped lasers. The study analyzed fibers with different sizes and pump excitation fields, revealing that the impact of bending and twisting on pump absorption increases with the fiber's cross-sectional area and showing a nontrivial dependence of pump absorption on the bending radius, including local maxima. For the largest fibers, both bending and twisting significantly influence pump absorption, especially for skew-ray mode excitation.
Origin: https://doi.org/10.1109/JPHOT.2021.3060857