L-band Q-switched fiber laser with gallium/thulium-doped silica fiber saturable absorber

K. Y. Lau, S. Z.M. Yasin, Pin Jern Ker, A. Mansoor, H. A. Abdul-Rashid, Y. Mustapha Kamil, M. A. Mahdi

Research output: Contribution to journalArticle


An L-band Q-switched fiber laser was demonstrated using gallium/thulium-doped silica fiber saturable absorber. At 10 cm in length, the saturable absorber generated Q-switched fiber laser at a pump power threshold of 39.6 mW and a central wavelength of 1601.93 nm. Beyond 53.3 mW, a spectrum with a central wavelength at 1602.00 nm was generated. On the other hand, the pulse repetition rate was obtained from 3.44 to 7.47 kHz whereas the pulse width reduces from 100.2 to 58.6 µs for pump power ranges from 39.6 to 53.3 mW. Within this range, the pulse energy is attained between 0.2600 and 0.2843 µJ, at a laser power slope efficiency of 6.94%. The constantly operated Q-switched fiber laser over 50 min observation time at 53.3 mW pump power ensures the feasibility of this pulse laser source as a practical device.

Original languageEnglish
Article number105615
JournalOptics and Laser Technology
Publication statusPublished - Nov 2019


All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

Cite this

Lau, K. Y., Yasin, S. Z. M., Ker, P. J., Mansoor, A., Abdul-Rashid, H. A., Mustapha Kamil, Y., & Mahdi, M. A. (2019). L-band Q-switched fiber laser with gallium/thulium-doped silica fiber saturable absorber. Optics and Laser Technology, 119, [105615]. https://doi.org/10.1016/j.optlastec.2019.105615