Growth and lasing of single crystal YAG fibers with different Ho3+ concentrations

Subhabrata Bera, Craig D. Nie, Michael G. Soskind, Yuan Li, James A. Harrington, Eric G. Johnson

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


A method to grow single crystal (SC) yttrium aluminum garnet (YAG) fibers with varied rare-earth ion dopant concentration has been proposed. Crystalline holmium aluminum garnet (HoAG), prepared via sol-gel process, was dip-coated on to previously grown SC YAG fibers. The HoAG coated SC YAG fiber preforms were re-grown to a smaller diameter using the laser heated pedestal growth (LHPG) technique. The final dopant concentration of the re-grown SC fiber was varied by changing the number of HoAG coatings on the preform. 120 μm diameter SC Ho:YAG fibers with four different dopant concentrations were grown. Lasing was demonstrated at 2.09 μm for these fibers. A maximum of 58.5% optical-to-optical slope efficiency was obtained.

Original languageEnglish (US)
Pages (from-to)44-48
Number of pages5
JournalOptical Materials
StatePublished - Jan 2018

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Computer Science(all)
  • Atomic and Molecular Physics, and Optics
  • Spectroscopy
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry
  • Electrical and Electronic Engineering


  • Fiber materials
  • Laser crystals
  • Rare-earth doped materials
  • Short wave IR laser
  • Sol-gel processing


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