Femtosecond-pulse inscribed FBGs for mode selection in multimode fiber lasers

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Abstract

Reflection properties of a fiber Bragg grating (FBG) inscribed in a multimode fiber strongly depend on the transverse profile of FBG. Point-by-point FBG fabrication by IR femtosecond pulses with highly nonlinear refraction index variation as a function of intensity within the focal spot offers an opportunity to tailor the FBG transverse profile with high spatial resolution. In this paper we review our recent results on the femtosecond inscription of FBGs in multimode fibers, study of their spectral and mode-selective properties as well as applications for mode selection in multimode and multicore fiber lasers.

Original languageEnglish
Article number101988
JournalOptical Fiber Technology
Volume52
DOIs
Publication statusPublished - 1 Nov 2019

Keywords

  • WRITING WAVE-GUIDES
  • BRAGG GRATINGS
  • HIGH-POWER
  • DOPED FIBER
  • RAMAN FIBER
  • OPTICAL-FIBERS
  • FUSED-SILICA
  • PHASE MASK
  • CORE FIBER
  • INSCRIPTION

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