Bismuth-doped fiber Q-switcher in erbium-doped fiber laser cavity

Pei Zhang, Kaharuddin Dimyati, Mustafa Mohammed Najm, Bilal Nizamani, Mukul Chandran Paul, Shyamal Das, Anirban Dhar, Mrinmay Pal, Moh Yasin, Sulaiman Wadi Harun

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


We propose a simple design of all-fiber Q-switched erbium-doped fiber laser (EDFL). The laser is passively Q-switched by splicing bismuth-doped fiber into a ring cavity. The design has been experimentally demonstrated at the emission wavelength of 1560.48 nm. A single-mode Q-switched pulse with pulse duration of 1.18 μs and pulse energy of 15.6 nJ was obtained with 980 nm pump power of 178 mW. Stable and typical Q-switched pulses were achieved at the repetition rate changing from 63.3 to 94.6 kHz. To the best of our knowledge, it is the first time to demonstrate bismuth-doped fiber as an effective saturable absorber for erbium-doped fiber laser.

Original languageEnglish
Pages (from-to)2214-2218
Number of pages5
JournalMicrowave and Optical Technology Letters
Issue number8
Publication statusPublished - Aug 2021


  • Q-switching
  • bismuth-doped fiber
  • fiber saturable absorber


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