Journal
OPTICS COMMUNICATIONS
Volume 453, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.optcom.2019.124406
Keywords
Fiber laser; Mode-locking; Gain-switching; Thulium-doped fiber
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Funding
- National Science Centre, Poland [UMO-2014/14/M/ST7/00868]
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Mode-locking and mode-locking-like operation in a fast gain-switched Tm-doped fiber laser have been investigated experimentally. Applying a SESAM mirror, stable gain-switched and regular mode-locked pulses at a wavelength of similar to 2 mu m are reported. The repetition rates of the gain-switched pulses and mode-locked subpulses are 50 kHz and 111 MHz, respectively. The duration of subpulses recorded within one gain-switched pulse envelope is similar to 110 ps. Besides, in the same laser system configuration, it has been found that self-starting mode-locked resembling pulses, attributed to mode beating, can be generated. To the best of our knowledge, it is the first report on a gain-switched fiber laser where both modes of operation have been demonstrated.
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