Abstract
In this paper, an all fiber self-mode-locked Tm-doped double-clad fiber ring laser is experimentally demonstrated. By inserting a piece of ∼95m SMF-28 into the cavity to enhance the nonlinearity and bring in a large net anomalous dispersion, stable self-mode-locked operation with mode-locked pulse bundles has been observed. About ∼8 sub-pulses with unequal amplitude and identical separation are contained in each produced pulse bundle. The width and adjacent separation of each sub-pulse are about ∼1ns and ∼63ns, respectively. With increasing the pump power to ∼2.17W, the maximum output power of ∼121mW is achieved at central wavelength of ∼1962.6nm.
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