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31 October 2016 Gain-switched thulium-doped fiber laser with ultra-wide tuning range
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We demonstrate an all-fiber gain-switched thulium-doped fiber laser (TDFL) producing nanosecond pulses with variable wavelength in the 2 μm waveband. The laser features tunable operation in an ultra-wide spectral region of 1765 – 2055 nm (24 THz). The nearly 300 nm tunability doubles the record tuning range of existing gain-switched fiber lasers, and to the best of our knowledge, presents the broadest tuning range that has been reported for a monolithic pulsed rare earth doped fiber laser to date. The TDFL can operate at a repetition rate of 5 – 100 kHz with a pulse width as short as ~200 ns. A modest compromise in the tuning range allows pulse width reduction to sub-100 ns.
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X. Cheng, Z. Li, J. Hou, and Z. Liu "Gain-switched thulium-doped fiber laser with ultra-wide tuning range", Proc. SPIE 10019, Optoelectronic Devices and Integration VI, 100190K (31 October 2016);


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