Modeling of large flattened mode area fiber lasers |
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Authors: | N N Elkin A P Napartovich V N Troshchieva and D V Vysotsky |
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Institution: | 1.Troitsk Institute for Innovation and Fusion Research,SRC RF TRINITI,Troitsk, Moscow region,Russia |
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Abstract: | Potentialities of independent tailoring the index and gain profiles in fiber laser aiming to achieve a strong modal discrimination
are theoretically examined. It is demonstrated by numerical simulations existence of fiber amplifier constructions which have
the flattened fundamental mode profile in the gain region. It is shown that the fundamental mode retain the largest modal
gain in comparison with modal gains of higher-order-modes for any depletion of the gain by the fundamental mode. The particular
design is presented with the flattened fundamental mode area 6360 μm squared. |
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