Low mode-locking threshold induced by surface plasmon field enhancement of gold nanoparticles | Zendy

Tao Jiang | Zendy; Zhe Kang | Zendy; Guanshi Qin | Zendy; Jun Zhou | Zendy; Weiping Qin | Zendy

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Low mode-locking threshold induced by surface plasmon field enhancement of gold nanoparticles

Author(s) -

Tao Jiang,

Zhe Kang,

Guanshi Qin,

Jun Zhou,

Weiping Qin

Publication year - 2013

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.21.027992

Subject(s) - materials science , carbon nanotube , surface plasmon , saturable absorption , colloidal gold , optics , plasmon , surface plasmon resonance , fiber laser , nanoparticle , optoelectronics , nanotechnology , wavelength , physics

We demonstrate a novel method to reduce the mode-locking threshold of erbium-doped fiber laser (EDFL) based on saturable absorber (SA). The SA was prepared by mixing gold nanoparticles (GNPs) and single-wall carbon nanotubes in sodium carboxymethylcellulose. The mode-locking threshold of EDFL was adjusted through simple changing the concentration of GNPs in the SA. The variation range of the threshold was as large as 21.5 mW. A lowest threshold of ~16 mW was obtained with the concentration of GNPs as 0.006 mmol/ml. The largest decreased ratio of the initial threshold was 47.5%. Surface plasmon field enhancement effect was speculated as the main reason for the reduced mode-locking threshold.

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