Abstract
We report passive mode locking of a soliton erbium-doped double-clad fiber laser operating at the 322nd harmonic of the fundamental cavity frequency. Repetition rates up to have been obtained with pulses of duration and of energy. The supermode suppression at the 322nd harmonic is better than . In addition, the transition dynamics from a bunched state of pulses to stable harmonic mode locking is presented, revealing a very long time scale.
© 2009 Optical Society of America
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