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Opt Lett. 2004 Sep 1;29(17):1995-7.

Passive harmonic mode locking with a high-power ytterbium-doped double-clad fiber laser.

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  • 1Groupe d'Optique et d'Optronique, Unité Mixte de Recherche (UMR 6614), Complex de Recherche Interprofessionnel en Aéro-thermochimie, Université de Rouen, 76801 Saint Etienne du Rouvray, France.


We report passive harmonic mode locking of a high-power Yb-doped double-clad fiber laser operating in both the normal- and the anomalous-dispersion regimes with a fundamental repetition rate of 20.4 MHz. In the normal-dispersion regime, 116-fs, 1.7-nJ pulses are emitted at a repetition rate of 102 MHz. The results indicate a supermode suppression of more than 60 dB. In the anomalous-dispersion regime, 1-ps, 125-pJ pulses are emitted at a higher repetition rate of 408 MHz.

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