研究目的
Investigating the generation of soliton molecules by a self-mode-locked Er/Yb double clad fiber laser.
研究成果
The study successfully demonstrates the generation of self-starting soliton molecules in a self-mode-locked Er/Yb double-clad fiber laser. The soliton molecules exhibit high modulation depth in the optical spectrum and stable temporal characteristics, with a repetition rate of 19.54 MHz and average power of 1.2 W at a pump power of ~4.8 W. This configuration offers a simple and reliable method for generating robust soliton molecules.
研究不足
The study is limited to the specific configuration of the Er/Yb double-clad fiber laser and may not be directly applicable to other laser systems. The robustness of soliton molecules at higher pump powers and their stability over long durations are areas for further investigation.
1：Experimental Design and Method Selection:
The experiment utilizes a self-mode-locked Er/Yb double-clad fiber laser to generate soliton molecules. The method relies on the saturable absorption effect produced by a weakly pumped section of the Er/Yb double-clad fiber used as gain medium.
2：Sample Selection and Data Sources:
A 1.8-m long homemade Er/Yb double-clad fiber with specific core and cladding dimensions is used as the gain medium.
3：8-m long homemade Er/Yb double-clad fiber with specific core and cladding dimensions is used as the gain medium. List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: The setup includes a fiber-pigtailed multimode laser diode, a (2+1)×1 pump/signal combiner, an optical isolator, a polarization controller, and a 90/10 optical coupler.
4：Experimental Procedures and Operational Workflow:
The laser configuration is optimized to avoid self-Q-switching pulses, and mode-locking is achieved by adjusting the polarization controller. The temporal characteristics, optical spectrum, and average output power are measured.
5：Data Analysis Methods:
The temporal characteristics are analyzed using a high-speed photodiode and oscilloscope, the optical spectrum is measured with an optical spectrum analyzer, and the average output power is measured with a thermal optical power meter.
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oscilloscope
DS0X6004A
Keysight Technologies
Monitoring the temporal characteristics of the laser
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optical spectrum analyzer
AQ6375
Yokogawa
Measuring the optical spectrum of the laser emission
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thermal optical power meter
PM310D
Thorlabs
Measuring the average output power
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high-speed photodiode
ET-5000
Electro-Optics Technology, Inc.
Measuring the temporal characteristics of the laser
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fiber-pigtailed multimode laser diode
Pumping the Er/Yb double-clad fiber
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