Oxyfluoride Core Silica-Based Optical Fiber with Intrinsically Low Nonlinearities for High Energy Laser Applications

Maxime Cavillon, Courtney J. Kucera, T. Wade Hawkins, Antoine F.J. Runge, Anna C. Peacock, Peter D. Dragic, John Ballato

Research output: Contribution to journalArticlepeer-review


A few-moded silica-based optical fiber fabricated from core materials that possess intrinsically low optical nonlinearities is reported. Specifically, the 8-μm core, 125-μm cladding diameter silicate fiber was composed of a strontium aluminosilicate oxyfluoride core with a fused silica cladding and was fabricated using the molten core method. Relative to conventional optical fibers, reductions of ∼6.3 dB in Brillouin gain coefficient (gB ), ∼0.9 dB in Raman gain coefficient (gR), and ∼2.2 dB in thermo-optic coefficient were realized as was a 'silica-like' nonlinear refractive index (n2) with a value of ∼3 × 10-20 m2/W. The role of each core material constituent on parameters that drive optical nonlinearities is discussed to provide a materials solution route for low nonlinearity fiber systems. Materially addressing optical nonlinearities represent a simpler and more effective approach to mitigating power-scaling limits in high energy fiber laser systems compared to the geometric approaches employed using microstructured fibers.

Original languageEnglish (US)
Article number7993000
Pages (from-to)284-291
Number of pages8
JournalJournal of Lightwave Technology
Issue number2
StatePublished - Jan 15 2018


  • High energy lasers
  • nonlinear refractive index
  • optical fiber
  • stimulated Brillouin scattering
  • stimulated Raman scattering
  • thermo-optic coefficient

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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