研究目的
Investigating the application of MoSe2 films as saturable absorbers in Q-switched all-fiber lasers.
研究成果
MoSe2-based SA exhibits excellent saturable absorption characteristics with a large modulation depth, enabling stable Q-switched fiber laser operation. The results suggest MoSe2 films are promising for large-modulation-depth optical modulators in ultrafast photonics.
研究不足
The study focuses on the Q-switched operation with MoSe2-based SA, but does not explore mode-locked operation or other potential applications of MoSe2 films in ultrafast photonics.
1：Experimental Design and Method Selection:
MoSe2 film is synthesized by the chemical vapor deposition method. Saturable absorber (SA) is assembled with the tapered fiber and MoSe2 films. Q-switched operation is achieved with the MoSe2-based SA.
2：Sample Selection and Data Sources:
MoSe2 films are prepared and characterized for their optical properties.
3：List of Experimental Equipment and Materials:
Laser diode (LD), erbium-doped fiber (EDF), wavelength division multiplexer (WDM), polarization controller (PC), polarization independent isolator (PI-ISO), optical coupler (OC), single mode fiber (SMF), spectrum analyzer, and oscilloscope.
4：Experimental Procedures and Operational Workflow:
The setup includes a laser diode for pump light, EDF for gain, WDM, PC for polarization adjustment, PI-ISO for unidirectional propagation, MoSe2-based SA, and OC for output measurement.
5：Data Analysis Methods:
Output pulses are measured by a spectrum analyzer and a 250 MHz oscilloscope.
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Laser diode
Provides pump light for the laser setup.
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Erbium-doped fiber
Provides gain in the laser cavity.
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Wavelength division multiplexer
976/1550
Used for wavelength division multiplexing in the laser setup.
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Polarization controller
Adjusts the polarization state of light in the laser cavity.
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Polarization independent isolator
PI-ISO
Ensures unidirectional propagation of the laser.
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Optical coupler
OC
Splits the laser into two paths for measurement and continued propagation.
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Single mode fiber
SMF
Connects each instrument in the laser setup.
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Spectrum analyzer
Measures the output spectrum of the laser.
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Oscilloscope
250 MHz
Measures the output pulses from the laser.
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