Generation of dark, Q-switched and bright pulses using erbium-ytterbium-thulium co-doped fiber

Research output: Contribution to journalArticle


  • Lau Lau Kuen Yao

  • N. Mohd Yusoff
  • M. A.W. Abdul Hadi
  • A. F. Abas
  • M. T. Alresheedi
  • M. A. Mahdi

Research units

  • Universiti Putra Malaysia
  • King Saud University


We demonstrate the generation of dark and bright pulses in a Q-switched laser using an erbium-ytterbium-thulium co-doped fiber. By manipulating pump power while maintaining lasing wavelength at 1571 nm, dark and bright pulses were observed at pump power thresholds 94.1 and 1770 mW with pulse duration of 3 and 71 ns, respectively. Stability of the two regimes were also high across an operating time of 60 min. These findings may be the stepping stone towards realising a laser with flexible operating range at different pulse regimes.


Original languageEnglish
Article number105937
JournalOptics and Laser Technology
Publication statusPublished - Apr 2020
MoE publication typeA1 Journal article-refereed

    Research areas

  • Bright pulses, Dark pulses, Erbium-doped fiber laser, Q-switching

ID: 39546757