Mode-locked thulium-doped fiber laser at 1982 nm by using a gold nanorods saturable absorber

Z. Kang, M. Y. Liu, X. J. Gao, N. Li, S. Y. Yin, G. S. Qin, W. P. Qin

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Abstract

We demonstrated a passively mode-locked fiber laser operating at 1982 nm by using a gold nanorods (GNRs) saturable absorber (SA). The GNRs SA was fabricated by mixing GNRs with sodium carbonxymethyl cellulose. By inserting the GNRs SA into a Tm-doped fiber laser cavity pumped by a 1570 nm fiber laser, stable passively mode-locking was achieved with a threshold pump power of 224 mW, ∼4.02 ps pulses at 1982 nm with a repetition rate of ∼37.49 MHz, and a maximum average power of ∼6 mW was obtained for a pump power of ∼265 mW.

Original languageEnglish
Article number045105
JournalLaser Physics Letters
Volume12
Issue number4
DOIs
StatePublished - 1 Apr 2015
Externally publishedYes

Keywords

  • fiber laser
  • gold nanorods
  • mode-locking

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