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- W2928983103 abstract "Detailed experimental investigations are presented on investigating mode instability and stimulated Raman scattering in 30μm core diameter fiber amplifier by varying the pumping light wavelength using 915/976nm LD sources. Results reveal that for 976nm pumping light, the highest power can reach to 3570W; and for 915nm pumping light, the highest power can reach to 3771W. Physical characteristics of mode instability do not perform in a traditional form both in output power and time domain traces, such as roll-over point in output power curve. However, the beam quality of output laser clearly reveals there are some more high-order modes which have an effect in mode instability characters. Compared to 976nm LD pumping source, laser of amplifier using 915nm LD pumping source shows stronger non-linear effect. When the output power is 3512W, the Raman light is 13dB below the signal light. By shortening the passive fiber before the endcap, when the output power is 3520W, the Raman light is 20dB." @default.
- W2928983103 created "2019-04-11" @default.
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- W2928983103 date "2019-03-29" @default.
- W2928983103 modified "2023-09-27" @default.
- W2928983103 title "Investigations of mode instability in large-mode-area fiber amplifier pumped by 915/976nm LD sources" @default.
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- W2928983103 doi "https://doi.org/10.1117/12.2522658" @default.
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