Holmium-doped ZBLAN fiber lasers at 1.2 μm

X. Zhu, J. Zong, R. A. Norwood, A. Chavez-Person, N. Peyghambarian, N. Prasad

Research output: Chapter in Book/Report/Conference proceedingConference contribution

18 Scopus citations


Holmium (Ho 3+)-doped ZBLAN glasses have been investigated for the purpose of achieving efficient fiber lasers at 1.2 μm. Because of the long lifetime of the upper laser level and the small phonon energy in Ho 3+-doped ZBLAN glasses, strong fluorescence at 1.2 μm that usually cannot be observed in Ho-doped silica glass has been measured. Fluorescence of 1 mol%, 3 mol%, and 6 mol% Ho 3+-doped ZBLAN glasses are reported. The effect of cerium and terbium ions on the emission of Ho 3+-doped ZBLAN glass has also been studied. Obstacles to achieving an efficient Ho 3+-doped ZBLAN laser are analyzed and discussed. In studies of a commercial Ho 3+-doped ZBLAN fiber laser, it was found that the 3 μm four-energy-level laser can easily overwhelm the 1.2 μm laser, which is a three-energy-level system having the same upper laser level with the 3 μm laser. In order to effectively suppress the competiting 3 μm transition, advanced Ho 3+-doped ZBLAN fiber has been designed and fabricated for 1.2 μm fiber lasers. Fiber lasers at 1.2 μm using the new Ho 3+-doped ZBLAN fiber have been developed. Our experiments demonstrate that the new Ho 3+-doped ZBLAN fiber is an efficient gain medium for lasers at 1.2 μm.

Original languageEnglish (US)
Title of host publicationFiber Lasers IX
Subtitle of host publicationTechnology, Systems, and Applications
StatePublished - 2012
EventFiber Lasers IX: Technology, Systems, and Applications - San Francisco, CA, United States
Duration: Jan 23 2012Jan 26 2012

Publication series

NameProgress in Biomedical Optics and Imaging - Proceedings of SPIE
ISSN (Print)1605-7422


OtherFiber Lasers IX: Technology, Systems, and Applications
Country/TerritoryUnited States
CitySan Francisco, CA


  • 1.2 μm lasers
  • Holmium-doped ZBLAN
  • fiber lasers

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Atomic and Molecular Physics, and Optics
  • Radiology Nuclear Medicine and imaging


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