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High-gain solid-state and fiber amplifier-chain for high-power coherent communication

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6 Author(s)
E. Rochat ; Inst. of Microtechnol., Neuchatel Univ., Switzerland ; K. Haroud ; U. Roth ; J. E. Balmer
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We report on the experimental results of a dual-stage amplifier combining a Nd-doped double-clad fiber and a Nd-doped YAG crystal. We obtained up to 3.5-W single-mode single-frequency output power with 28-dB gain. This is, to the best of our knowledge, the first demonstration of a dual-stage amplifier combining doped fibers and solid-state amplifiers.

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IEEE Photonics Technology Letters  (Volume:11 ,  Issue: 9 )