Impact of gain saturation on the mode instability threshold in high-power fiber amplifiers

Kristian Rymann Hansen, Jesper Lægsgaard

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Abstract

We present a coupled-mode model of transverse mode instability in high-power fiber amplifiers, which takes the effect of gain saturation into account. The model provides simple semi-analytical formulas for the mode instability threshold, which are valid also for highly saturated amplifiers. The model is compared to recently published detailed numerical simulations of mode instability, and we find reasonably good agreement with our simplified coupled-mode model. (C) 2014 Optical Society of America
Original languageEnglish
JournalOptics Express
Volume22
Issue number9
Pages (from-to)11267-11278
ISSN1094-4087
DOIs
Publication statusPublished - 2014

Keywords

  • OPTICS
  • LASERS
  • Stability
  • Gain saturation
  • High-power fiber amplifiers
  • Mode instabilities
  • Saturated amplifiers
  • Semi-analytical
  • Transverse mode
  • Amplifiers (electronic)

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