AffiliationUniv Arizona, Coll Opt Sci
Univ Arizona, Dept Syst & Ind Engn
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CitationHuang, C., Geng, J., Luo, T., Han, J., Wang, Q., Liang, R., … Jiang, S. (2019). Rare Earth Doped Optical Fibers with Multi-section Core. IScience, 22, 423–429. https://doi.org/10.1016/j.isci.2019.11.017
RightsCopyright © 2019 The Author(s). Published by Elsevier Inc. All rights reserved. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
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AbstractThe gain bandwidth of a single-mode fiber is limited by the atomic transitions of one rare earth gain element. Here we overcome this long-standing challenge by designing a new single-mode fiber with multi-section core, where each section is doped with different gain element. We theoretically propose and experimentally demonstrate that this configuration provides a gain bandwidth well beyond the capability of conventional design, whereas the inclusion of multiple sections does not compromise single-mode operation or the quality of the transverse modal profile. This new fiber will be beneficial in realizing all fiber laser systems with few-cycle pulse duration or octave tunability.
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