All-normal-dispersion dissipative-soliton fiber laser at 1.06 μm using a bulk-structured Bi2Te3topological insulator-deposited side-polished fiber

Cheolhwan Chi, Junsu Lee, Joonhoi Koo, Ju Han Lee

Research output: Contribution to journalArticlepeer-review

59 Scopus citations

Abstract

We experimentally demonstrate a 1.06-μm dissipative-soliton fiber laser incorporating a saturable absorber based on a bulk-structured Bi2Te3topological insulator (TI). The saturable absorber, which had a bulk-structured Bi2Te3TI film deposited on a side-polished fiber, provided the dual functions of nonlinear saturable absorption and spectral comb filtering, which are essential for the generation of dissipative solitons. The saturable absorption function was obtained through a micrometer-thick bulk-structured Bi2Te3TI film, whereas the spectral comb filtering function was through the asymmetric side-polished fiber structure, on top of which a different refractive index film was deposited. The ∼17 μm-thick Bi2Te3TI film was prepared using a simple mechanical exfoliation method. The fabrication of the targeted micrometer-thick bulk-structured film was straightforward without needing special care, compared to nanosheet-based film fabrication. Stable dissipative-soliton pulses with a composite temporal shape were readily obtained by incorporating the prepared saturable absorber into an ytterbium-doped fiber ring cavity with all-normal dispersion. The temporal width of the output pulses was measured to be ∼230 ps.

Original languageEnglish
Article number105106
JournalLaser Physics
Volume24
Issue number10
DOIs
StatePublished - 1 Oct 2014

Keywords

  • Bulk structure
  • Dissipative soliton
  • Fiber laser
  • Saturable absorber
  • Topological insulator

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