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19 February 2009 Multi-tone approach to SBS mitigation in narrow linewidth high power fiber amplifiers
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Abstract
We investigate theoretically multi-tone seeding of high power ytterbium-doped amplifiers using a numerical code that solves a two-point boundary problem. A large wavelength separation among the signals is used leading to efficient transfer of power through laser gain while increasing the stimulated Brillouin scattering threshold in the channel of interest. Two-tone and three-tone seeding configurations are considered. For two-tone seeding, it is shown that a combination of narrow linewidth and broadband signals employed in a co-propagating geometry can achieve the same level of SBS suppression as counter-pumping.
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Clint Zeringue, Iyad Dajani, Chunte Lu, Christopher Vergien, and Craig Robin "Multi-tone approach to SBS mitigation in narrow linewidth high power fiber amplifiers", Proc. SPIE 7195, Fiber Lasers VI: Technology, Systems, and Applications, 71952I (19 February 2009); https://doi.org/10.1117/12.808054
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