A CW, higher-order mode, Er-doped-fiber amplifier is demonstrated with output reconversion to the fundamental mode for the first time. Amplification takes place in the LP0,14 mode with an effective area of 6000 μm2.|A CW, higher-order mode, Er-doped-fiber amplifier is demonstrated with output reconversion to the fundamental mode for the first time. Amplification takes place in the LP0,14 mode with an effective area of 6000 μm2.
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