Journal article
Suppression of Higher-Order Modes by Segmented Core Doping in Rod-Type Photonic Crystal Fibers
Abstract—A large mode area Yb-doped rod-type photonic crystal fiber design with a low refractive index ring in the core is proposed to provide an improved suppression of the first higher-order mode compared to the case of uniform core doping, in a way which is more robust against fluctuations in the refractive index value.
After applying a scalar step-index model for a first parameter optimization of the proposed design, a full-vector modal solver based on the finite element method has been exploited to analyze the guided mode overlap and effective area for the most promising fibers identified. Finally, a spatial and spectral amplifier model has been considered to study the gain competition among the fundamental and the first higher-order mode guided in the Yb-doped rod-type fibers.
Results have demonstrated the effectiveness of the low refractive index ring in suppressing the higher-order mode, thus providing an effectively single-mode behavior for the rod-type fibers.
| Language: | English |
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| Publisher: | IEEE |
| Year: | 2009 |
| Pages: | 4935-4942 |
| ISSN: | 15582213 and 07338724 |
| Types: | Journal article |
| DOI: | 10.1109/JLT.2009.2026494 |
| ORCIDs: | Lægsgaard, Jesper and Broeng, Jes |
Doping Finite element methods Fluctuations Optical arrays Optical fiber amplifiers Optical fibers Photonic crystal fibers Refractive index Robustness Semiconductor process modeling Silicon compounds Ytterbium finite element analysis finite element method full-vector modal solver guided mode overlap higher-order mode suppression holey fibres optical fiber amplifiers photonic crystal fibers photonic crystals refractive index refractive index ring segmented core doping
