Abstract

We report on a generation of self-starting mode-locked resembling (MLR) pulses in an all-fiber, gain-switched ${\mathrm{Tm}}^{3+}$-doped fiber laser operating at 2 μm wavelength, which we believe to be the first demonstration of such an approach. The laser delivers 100% modulated MLR pulses within an envelope of $\sim 30\mathrm{ns}$ gain-switched pulse at a repetition rate of 30 kHz. The maximum average output power is 0.4 W and the maximum peak-power of MLR pulses can be as high as 1.1 kW. The performance of the laser is described.

© 2013 Optical Society of America

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