Transverse-Mode Instability In High Power Fiber Amplifiers Involving Thermally-Induced Gratings Without Frequency Offset

Lasers and Electro-Optics(2014)

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Abstract
Time-dependent coupled-mode theory predicts transverse-mode instabilities in high power fiber amplifiers originating from thermally-induced gratings possessing a spatial phase shift with respect to a beating pattern of two transversal modes of the same frequency.
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Key words
coupled mode analysis,diffraction gratings,laser beams,laser modes,multiwave mixing,optical fibre amplifiers,thermo-optical devices,beating pattern,high power fiber amplifiers,spatial phase shift,thermally-induced gratings,time-dependent coupled-mode theory,transversal modes,transverse-mode instability
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