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Laser & Optoelectronics Progress, Volume. 62, Issue 17, 1714003(2025)

Mode-Locked Fiber Laser Based on Graphene/WS2 Heterojunction

Yunhan Zhu1, Jianhua Chang1,2、*, Qian Tu1, and Tengfei Dai1
Author Affiliations
  • 1School of Electronics and Information Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, Jiangsu , China
  • 2Jiangsu Provincial Collaborative Innovation Center for Atmospheric Environment and Equipment Technology, Nanjing University of Information Science and Technology, Nanjing 210044, Jiangsu , China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (10)
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    References (39)
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    Figures & Tables(10)
    Preparation process of Gr/WS2 saturable absorption device and optical microscope image of micro-nano fiber

    Fig. 1. Preparation process of Gr/WS2 saturable absorption device and optical microscope image of micro-nano fiber

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    Characterization diagrams of different devices. (a) Raman spectra of Gr, WS2, and Gr/WS2; (b) SEM image of Gr; (c) SEM image of WS2; (d) SEM image of Gr/WS2

    Fig. 2. Characterization diagrams of different devices. (a) Raman spectra of Gr, WS2, and Gr/WS2; (b) SEM image of Gr; (c) SEM image of WS2; (d) SEM image of Gr/WS2

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    Experiments for nonlinear transmittance of saturable absorbers. (a) Experimental device; (b) nonlinear transmission curve of Gr/WS2; (c) nonlinear transmission curve of Gr; (d) nonlinear transmission curve of WS2

    Fig. 3. Experiments for nonlinear transmittance of saturable absorbers. (a) Experimental device; (b) nonlinear transmission curve of Gr/WS2; (c) nonlinear transmission curve of Gr; (d) nonlinear transmission curve of WS2

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    Schematic diagram of fiber laser

    Fig. 4. Schematic diagram of fiber laser

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    Relationships between output power and pump power of different devices

    Fig. 5. Relationships between output power and pump power of different devices

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    Pulsed output characteristics of the Gr/WS₂ mode-locked laser. (a) Mode-locked spectrum; (b) pulse sequence; (c) radio frequency spectrum; (d) autocorrelation curve

    Fig. 6. Pulsed output characteristics of the Gr/WS₂ mode-locked laser. (a) Mode-locked spectrum; (b) pulse sequence; (c) radio frequency spectrum; (d) autocorrelation curve

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    Stability test of output power within 6 h

    Fig. 7. Stability test of output power within 6 h

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    Pulsed output characteristics of the Gr mode-locked laser. (a) Mode-locked spectrum; (b) pulse sequence; (c) radio frequency spectrum; (d) autocorrelation curve

    Fig. 8. Pulsed output characteristics of the Gr mode-locked laser. (a) Mode-locked spectrum; (b) pulse sequence; (c) radio frequency spectrum; (d) autocorrelation curve

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    Pulsed output characteristics of the WS₂ mode-locked laser. (a) Mode-locked spectrum; (b) pulse sequence; (c) radio frequency spectrum; (d) autocorrelation curve

    Fig. 9. Pulsed output characteristics of the WS₂ mode-locked laser. (a) Mode-locked spectrum; (b) pulse sequence; (c) radio frequency spectrum; (d) autocorrelation curve

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    • Table 1. Performance comparison of mode-locked lasers based on different saturable absorbers

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      Table 1. Performance comparison of mode-locked lasers based on different saturable absorbers

      MaterialPreparation methodFiber sample fabricationModulationdepth /%Conversion efficiency /%SNR /dBRef.
      GrCVDConnector2.933.6031.0［37］
      LPEMicrofiber22.824.0871.0Proposed
      WS2CVDConnector2.902.1847.5［25］
      LPEConnector2.901.2275.0［38］
      LPEMicrofiber18.173.6963.0Proposed
      Gr/WS2CVDConnector16.803.0568.0［25］
      LPEMicrofiber1.463.6763.7［39］
      LPEMicrofiber26.934.5475.0Proposed
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    Yunhan Zhu, Jianhua Chang, Qian Tu, Tengfei Dai. Mode-Locked Fiber Laser Based on Graphene/WS2 Heterojunction[J]. Laser & Optoelectronics Progress, 2025, 62(17): 1714003

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    Paper Information

    Category: Lasers and Laser Optics

    Received: Jan. 7, 2025

    Accepted: Feb. 17, 2025

    Published Online: Aug. 11, 2025

    The Author Email: Jianhua Chang (jianhuachang@nuist.edu.cn)

    DOI:10.3788/LOP250468

    CSTR:32186.14.LOP250468

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology