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

Kristian Rymann Hansen | Zendy; Jesper Lægsgaard | Zendy

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

Author(s) -

Kristian Rymann Hansen,

Jesper Lægsgaard

Publication year - 2014

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.22.011267

Subject(s) - instability , optics , amplifier , saturation (graph theory) , fiber amplifier , mode (computer interface) , physics , optical fiber , mechanics , fiber laser , optoelectronics , computer science , mathematics , cmos , combinatorics , operating system

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.

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