Multiwavelength Q-switched pulse operation with gold nanoparticles as saturable absorber

Shi Li, Yu Yin, Elfed Lewis, Gerald Farrell, Masaki Tokurukawa, Ahmad Haziq Aiman Rosol, Sulaiman Wadi Harun, Pengfei Wang

Research output: Contribution to journalArticlepeer-review

Abstract

A multiwavelength Q-switched pulse operation obtained directly using a Tm-doped fiber laser and employing gold nanoparticles (GNPs) as a saturable absorber (SA material) is reported. The GNPs SA exhibits a modulation depth of 5.4% and a nonsaturable loss of 21.3%. Due to the saturable absorption and the high nonlinearity, dual-wavelength and triple-wavelength Q-switched pulse operations are obtained at pump power levels of 200 and 500 mW. To the best of our knowledge, this is the first ever reported use of GNPs as SA in multiwavelength Q-switched lasing generation.

Original languageEnglish
Article number066104
JournalOptical Engineering
Volume58
Issue number6
DOIs
Publication statusPublished - 1 Jun 2019

Keywords

  • gold nanoparticles SA
  • multiwavelength fiber laser
  • Q-switched pulse

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