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Theoretical and experimental investigations of a single-mode 976-nm Yb-doped fiber amplifier

We present the investigation of the amplification of a laser diode emitting at 976 nm in a single mode ytterbium-doped fiber in order to develop a blue laser source at 488 nm by second-harmonic generation. An optimization of the non-linear frequency-doubling process is described theoretically. First results on the amplification of the laser diode are presented.