Rare Earth Doped Optical Fibers with Multi-section Core

Chongyuan Huang, Jihong Geng, Tao Luo, Jiali Han, Qing Wang, Rongguang Liang, Shanhui Fan, Shibin Jiang

Research output: Contribution to journalArticle


The 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.

Original languageEnglish (US)
Pages (from-to)423-429
Number of pages7
StatePublished - Dec 20 2019



  • Fiber Optics
  • Optical Materials
  • Optics

ASJC Scopus subject areas

  • General

Cite this

Huang, C., Geng, J., Luo, T., Han, J., Wang, Q., Liang, R., Fan, S., & 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