Abstract

We report what we believe to be the first demonstration of stable short pulse (10ns) generation from a gain-switched Tm-doped fiber laser in the 2μm spectral region. A modulated 1.55μm pump laser was used for fast gain switching to regulate the conventionally chaotic spiking in the gain-switched fiber laser. From a 6.3μm core all-fiber oscillator, over a kilowatt of peak power was obtained at the slope efficiency of 50% and freely varying repetition rate up to 500kHz.

© 2007 Optical Society of America

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