• Chinese Optics Letters
  • Vol. 16, Issue 2, 020009 (2018)
H. Ahmad*, Z. C. Tiu, and S. I. Ooi
Author Affiliations
  • Photonics Research Centre, University of Malaya, Kuala Lumpur 50603, Malaysia
  • show less
    DOI: 10.3788/COL201816.020009 Cite this Article Set citation alerts
    H. Ahmad, Z. C. Tiu, S. I. Ooi. Passive Q-switching in an erbium-doped fiber laser using tungsten sulphoselenide as a saturable absorber[J]. Chinese Optics Letters, 2018, 16(2): 020009 Copy Citation Text show less
    XRD patterns of WSSe-exfoliated crystal.
    Fig. 1. XRD patterns of WSSe-exfoliated crystal.
    (a) FESEM image of the exfoliated WSSe sample and (b) the elemental composition of the exfoliated WSSe sample.
    Fig. 2. (a) FESEM image of the exfoliated WSSe sample and (b) the elemental composition of the exfoliated WSSe sample.
    Raman spectra of the bulk and exfoliated WSSe crystal. The inset shows the Raman spectrum of the exfoliated WSSe crystal with its peaks made easier to see.
    Fig. 3. Raman spectra of the bulk and exfoliated WSSe crystal. The inset shows the Raman spectrum of the exfoliated WSSe crystal with its peaks made easier to see.
    Nonlinear absorption characterization of the WSSe-exfoliated crystal using the twin detection technique.
    Fig. 4. Nonlinear absorption characterization of the WSSe-exfoliated crystal using the twin detection technique.
    Experimental setup of the C-band Q-switched EDFL with a mechanical exfoliated WSSe as an SA.
    Fig. 5. Experimental setup of the C-band Q-switched EDFL with a mechanical exfoliated WSSe as an SA.
    Optical output of EDFL with and without incorporation of the WSSe SA.
    Fig. 6. Optical output of EDFL with and without incorporation of the WSSe SA.
    3D pulse train evolution of the proposed EDFL against the pump power.
    Fig. 7. 3D pulse train evolution of the proposed EDFL against the pump power.
    Pulse repetition rate and pulse width of the Q-switched EDFL against the pump power.
    Fig. 8. Pulse repetition rate and pulse width of the Q-switched EDFL against the pump power.
    Output power and pulse energy of the Q-switched EDFL against the pump power.
    Fig. 9. Output power and pulse energy of the Q-switched EDFL against the pump power.
    Radio frequency spectrum of the Q-switched YDFL at a pump power of 280.5 mW.
    Fig. 10. Radio frequency spectrum of the Q-switched YDFL at a pump power of 280.5 mW.
    Optical spectra of the tunable wavelength Q-switched laser at a maximum pump power of 280.5 mW.
    Fig. 11. Optical spectra of the tunable wavelength Q-switched laser at a maximum pump power of 280.5 mW.
    Pulse repetition rate and pulse width evolution of the proposed tunable Q-switched fiber laser at the maximum pump power of 280.5 mW.
    Fig. 12. Pulse repetition rate and pulse width evolution of the proposed tunable Q-switched fiber laser at the maximum pump power of 280.5 mW.
    Saturable AbsorberOperating Power (mW)Pulse Repetition Rate (kHz)Pulse Width (μs)Refs.
    Carbon nanotube12.8-40.9527.5 (max)15 (min)[18]
    Graphene/ PVA101.8-230.421.5-36.37.2-3.2[19]
    MoS2/PVA18.9-227.18.77-43.4726.7-3.3[20]
    WS2/PVA60-3004.5-49.67.9-3.1[21]
    MoSe2/PVA22.4-102.016.9-32.859.1-30.4[2]
    Bi2Te3-graphene59.9-3049.3-35.0723-3.247[22]
    WSSe89.07-280.527.52-61.814.16-2.6This work
    Table 1. Comparison of the Output Performance of C-band Q-switched Lasers Generated by Different SAs
    H. Ahmad, Z. C. Tiu, S. I. Ooi. Passive Q-switching in an erbium-doped fiber laser using tungsten sulphoselenide as a saturable absorber[J]. Chinese Optics Letters, 2018, 16(2): 020009
    Download Citation