Jump to main content
Jump to site search

Issue 18, 2017
Previous Article Next Article

Tungsten disulphide for ultrashort pulse generation in all-fiber lasers

Author affiliations

Abstract

Tungsten disulphide (WS2), which exhibits excellent saturable absorption properties, has attracted much attention in the applications of photonic devices. In this paper, WS2 is applied for the preparation of a saturable absorber (SA). Using the pulsed laser deposition (PLD) method, WS2 is deposited on the side surface of the tapered fiber. In order to obtain larger non-linearity of the SAs with evanescent wave interaction, the tapered fiber had a smaller waist diameter and longer fused zone. Gold film was deposited on the fiber-taper WS2 SAs to improve their reliability and avoid oxidation and corrosion. Employing the balanced twin-detector method, the modulation depth of the fiber-taper WS2 SAs was measured to be 17.2%. With the fiber-taper WS2 SA, a generated pulse with 246 fs duration and a 57 nm bandwidth was obtained at 1561 nm. The electrical signal to noise ratio was better than 92 dB. To our knowledge, the pulse duration was the shortest among the reported all-fiber lasers with transition metal dichalcogenide (TMD) SAs. These results indicate that fiber-taper WS2 SAs with smaller waist diameter and longer fused zone are promising photonic devices for ultrashort pulse generation in all-fiber lasers.

Graphical abstract: Tungsten disulphide for ultrashort pulse generation in all-fiber lasers

Back to tab navigation

Publication details

The article was received on 09 Feb 2017, accepted on 27 Feb 2017 and first published on 03 Mar 2017


Article type: Paper
DOI: 10.1039/C7NR00971B
Citation: Nanoscale, 2017,9, 5806-5811
  •   Request permissions

    Tungsten disulphide for ultrashort pulse generation in all-fiber lasers

    W. Liu, L. Pang, H. Han, K. Bi, M. Lei and Z. Wei, Nanoscale, 2017, 9, 5806
    DOI: 10.1039/C7NR00971B

Search articles by author

Spotlight

Advertisements