研究目的
Investigating the generation of high-power, large-energy mode-locked Er-doped fiber lasers using a high-damage-threshold MoS2 saturable absorber.
研究成果
The study successfully demonstrated a high-power, large-energy mode-locked Er-doped fiber laser using a novel glass-MoS2-glass SA. The maximum average output power and pulse energy achieved represent new records for such lasers based on 2D-material SAs, indicating significant potential for commercial applications.
研究不足
The study focuses on the use of MoS2 as a saturable absorber and its application in Er-doped fiber lasers. The limitations include the specific conditions required for the chemical vapor deposition method and the design of the sandwich structure for the SA.
1：Experimental Design and Method Selection:
The study employed a chemical vapor deposition method to prepare MoS2 materials and a newly designed glass–material–glass sandwich structure for the SA.
2：Sample Selection and Data Sources:
MoS2 materials were prepared on fluorophlogopite mica and sapphire substrates.
3：List of Experimental Equipment and Materials:
Equipment included a scanning electron microscope (SEM, Sigma 500, ZEISS), atomic force microscope (AFM, Bruker Multimode 8), and spectrophotometer (Hitachi, U-4100). Materials included MoS2, glass coating (CG-9H, Ceranic Glass Ltd.), and Er-doped fiber.
4：0). Materials included MoS2, glass coating (CG-9H, Ceranic Glass Ltd.), and Er-doped fiber. Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The SA was fabricated by spin-coating liquid glass, placing MoS2, and sealing with another glass layer. The laser setup included two 976 nm pump lasers, Er-doped fiber, and a
5：4 m-long ring laser cavity. Data Analysis Methods:
2 Nonlinear optical absorption properties were analyzed using power-dependent transmission technique.
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atomic force microscope
Bruker Multimode 8
Bruker
Testing the layered properties of the prepared MoS2 material.
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spectrophotometer
U-4100
Hitachi
Measuring the optical transmission property of the CVD-MoS2.
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single-mode fiber
SMF-28e+
Coning
Incorporated into the laser cavity for nonlinear effect matching.
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scanning electron microscope
Sigma 500
ZEISS
Characterization of the prepared MoS2 materials.
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liquid glass
CG-9H
Ceranic Glass Ltd.
Used for coating in the preparation of the SA.
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976 nm lasers
SM-97X-S
Jingjiang
Pumping the Er-doped active fiber.
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wavelength division multiplexers
WD97X/15FA
Jingjiang
Used in the laser setup for wavelength division multiplexing.
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polarization independent isolator
PI15/3FA
Jingjiang
Ensuring unidirectional propagation of the pulse in the ring laser cavity.
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polarization controllers
PCE/SMe-3
Jingjiang
Constructing the laser cavity for polarization adjustment.
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output coupler
OC15/3FA
Jingjiang
Delivering the generated fiber laser out of the cavity.
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optical spectrum analyzer
AQ6317B
Recording the emission spectrum of the mode-locked ring fiber laser.
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radio analyzer
R&S FPC1000
Examining the operation stability of the mode-locked state.
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