研究目的
Investigating the self-wavelength-sweeping phenomenon in a bi-directional thulium-doped fiber ring laser and its control through polarization adjustment.
研究成果
The study successfully demonstrated the self-wavelength-sweeping phenomenon in a bi-directional thulium-doped fiber ring laser, with the ability to control the sweep rate through polarization adjustment. This finding contributes to the understanding of mode coupling behavior in bi-directional fiber ring lasers and opens up potential applications in optical sensing and component interrogation.
研究不足
The study is limited to the observation and control of the self-wavelength-sweeping phenomenon in a specific setup of a bi-directional thulium-doped fiber ring laser. Further research is needed to explore the phenomenon in other configurations and its applications.
1：Experimental Design and Method Selection:
The study utilized a bi-directional thulium-doped fiber ring laser setup to explore the self-wavelength-sweeping phenomenon. The methodology involved adjusting the state of polarization within the laser cavity to control the sweep rate.
2：Sample Selection and Data Sources:
A 2.5 m long thulium-doped fiber was used as the gain medium, pumped by an external cavity laser at 1570 nm amplified by an erbium-doped fiber amplifier.
3：5 m long thulium-doped fiber was used as the gain medium, pumped by an external cavity laser at 1570 nm amplified by an erbium-doped fiber amplifier. List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Equipment included a wavelength-division-multiplexer, thulium-doped fiber, output coupler, isolators, polarization controller, optical spectrum analyzer, and InGaAs photodetector.
4：Experimental Procedures and Operational Workflow:
The experiment involved setting up the laser cavity, adjusting the polarization controller to observe the self-wavelength-sweeping phenomenon, and measuring the output spectra and temporal behavior.
5：Data Analysis Methods:
The output spectra and temporal behavior were analyzed to determine the sweep range, rate, and the effect of polarization adjustment.
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optical spectrum analyzer
AQ6375
Yokogawa
Measuring the laser output spectra
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InGaAs photodetector
EOT-5000F
Measuring the temporal behavior of the laser outputs
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external cavity laser
Pump source for the thulium-doped fiber laser
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erbium-doped fiber amplifier
Amplifying the pump source
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thulium-doped fiber
Gain medium for the laser
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wavelength-division-multiplexer
Connecting the thulium-doped fiber to the laser cavity
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output coupler
Bi-directional propagation in the laser cavity
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isolator
Blocking unwanted reflection back to the laser cavity
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polarization controller
Adjusting the state of polarization within the laser cavity
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