研究目的
Investigating the application of ternary MoWSe2 as a saturable absorber in Q-switched fiber lasers for output energy enhancement.
研究成果
Ternary MoWSe2 demonstrates significant potential as a saturable absorber in Q-switched fiber lasers, enabling dual-wavelength operation with high single pulse energy and peak power. The material's broad-band infrared absorption and good environmental stability make it a promising candidate for nonlinear optoelectronic applications.
研究不足
The study focuses on the application of MoWSe2 in Q-switched fiber lasers at specific wavelengths, and the scalability or application in other laser systems is not explored. The environmental stability and damage threshold of MoWSe2-SA under prolonged operation are not extensively studied.
1：Experimental Design and Method Selection:
The study employed liquid phase exfoliation to fabricate few-layered MoWSe2 and applied it as a saturable absorber in a Q-switched fiber laser.
2：Sample Selection and Data Sources:
MoWSe2 powder was dispersed in isopropyl alcohol (IPA) and ultrasonicated to produce few-layer flakes.
3：List of Experimental Equipment and Materials:
A 980 nm laser diode, erbium-doped fiber (EDF), wavelength division multiplexer (WDM), polarization-insensitive isolator (PI-ISO), polarization controller (PC), output coupler (OC), high-speed InGaAs PIN photo-detector module, optical spectrum analyzer (OSA), digital oscilloscope, and optical power meter were used.
4：Experimental Procedures and Operational Workflow:
The MoWSe2-SA was incorporated into a fiber laser setup to generate Q-switched pulses, with performance monitored across varying pump powers.
5：Data Analysis Methods:
The nonlinear saturable absorption properties of MoWSe2 were characterized using Z-scan and I-scan measurements, and the laser's output was analyzed for pulse width, repetition rate, and energy.
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optical spectrum analyzer
AQ6375
Yokogawa
Analyzing the spectral output of the laser.
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digital oscilloscope
DLM2054
Yokogawa
Monitoring the temporal characteristics of the laser output.
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optical power meter
PM100D
Thorlabs
Measuring the average output power of the laser.
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laser diode
980 nm
Pumping the erbium-doped fiber (EDF) as the gain medium.
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erbium-doped fiber
LEKKI Er 110-4/125
Serving as the gain medium in the fiber laser setup.
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wavelength division multiplexer
980/1550 nm
Coupling the pump laser into the fiber laser cavity.
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polarization-insensitive isolator
Ensuring unidirectional beam oscillation in the laser cavity.
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polarization controller
Optimizing the polarization state within the laser cavity.
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output coupler
10/90
Extracting 10% of the laser energy for output while allowing 90% for oscillation.
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high-speed InGaAs PIN photo-detector module
PD03
Monitoring the laser output temporally.
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