26 February 2013 Mode instability thresholds of fiber amplifiers
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We show by detailed numerical modeling that stimulated thermal Rayleigh scattering can account for the modal instability observed in high power fiber amplifiers. Our model illustrates how the instability threshold power can be maximized by eliminating amplitude and phase modulation of the signal seed light and the pump light and by careful injection of the signal seed light. We also illustrate the influence of photodarkening and mode specific loss.
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Arlee V. Smith, Arlee V. Smith, Jesse J. Smith, Jesse J. Smith, } "Mode instability thresholds of fiber amplifiers", Proc. SPIE 8601, Fiber Lasers X: Technology, Systems, and Applications, 860108 (26 February 2013); doi: 10.1117/12.2002669; https://doi.org/10.1117/12.2002669

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