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26 February 2018 Effects of perturbation relative phase on transverse mode instability gain
Michalis N. Zervas
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Proceedings Volume 10512, Fiber Lasers XV: Technology and Systems; 105121Y (2018) https://doi.org/10.1117/12.2294917
Event: SPIE LASE, 2018, San Francisco, California, United States
Abstract
We have shown that the relative phase between the fundamental fiber mode and the transverse perturbation affects significantly the local transverse modal instability (TMI) gain. The gain variation is more pronounced as the core diameter increases. This finding can be used in conjunction with other proposed approaches to develop efficient strategies for mitigating TMI in high power fiber amplifiers and lasers. It also provides some physical insight on the physical origin of the observed large differences in the TMI threshold dependence on core diameter for narrow and broad linewidth operation.
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Michalis N. Zervas "Effects of perturbation relative phase on transverse mode instability gain", Proc. SPIE 10512, Fiber Lasers XV: Technology and Systems, 105121Y (26 February 2018); https://doi.org/10.1117/12.2294917
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KEYWORDS
Phase shifts
Fiber lasers
High power fiber amplifiers
Thermal effects
High power fiber lasers
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