Burst-mode pulse generation from a bismuth-doped germanosilicate fiber laser through self Q-switched mode-locking

M. Jung, J. Lee, M. Melkumov, V. F. Khopin, E. M. Dianov, J. H. Lee

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

A bismuth-doped germanosilicate fiber laser was experimentally demonstrated to engage in self-Q-switched mode-locking at a wavelength of 1470 nm. Mode-locked pulse bursts were generated from a ring cavity without using a saturable absorber when the cavity length was properly adjusted. At a cavity length of 65 m, repetition rates of ∼31.5 kHz and ∼3.088 MHz and temporal widths of ∼4.7 μs and ∼1.2 ns were measured for the Q-switching envelopes and mode-locked pulses under the Q-switching envelopes, respectively. The laser operating regime was observed to change from Q-switching to Q-switched mode-locking as cavity length increases by adding a segment of anomalously dispersive fiber. The output pulse characteristics such as pulse width and repetition rate of the Q-switching envelopes and mode-locked pulses were also investigated with respect to the cavity length.

Original languageEnglish
Article number125102
JournalLaser Physics Letters
Volume11
Issue number12
DOIs
StatePublished - 1 Dec 2014

Keywords

  • Q-switching
  • bismuth-doped fiber
  • fiber lasers
  • germanosilicate fiber
  • mode-looking

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