研究目的
Investigating the polarization-dependent pulse dynamics in a fiber laser cavity mode-locked by single-wall carbon nanotubes with near-zero net dispersion.
研究成果
The study demonstrates novel polarization-dependent pulse dynamics in a fiber laser with near-zero net dispersion, revealing the generation of double pulses and coherent energy coupling between pulses due to polarization hole burning. These findings enhance understanding of vector pulse evolution dynamics and contribute to the design of polarization-dependent mode-locked lasers.
研究不足
The study is limited by the specific configuration of the fiber laser cavity and the materials used, such as single-wall carbon nanotubes and erbium-doped fiber. The findings may not be directly applicable to other laser systems or materials.
1：Experimental Design and Method Selection:
The study utilizes a ring laser cavity mode-locked by single-wall carbon nanotubes, managing net dispersion and polarization state to investigate pulse dynamics.
2：Sample Selection and Data Sources:
The laser cavity includes a 4.4 m erbium-doped fiber as the gain medium and a 5.6 m single-mode fiber with specific dispersion coefficients.
3：4 m erbium-doped fiber as the gain medium and a 6 m single-mode fiber with specific dispersion coefficients. List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Equipment includes a polarization controller, isolator, wavelength division multiplexer, coupler, band-pass filter, polarization analyzer, optical spectral analyzer, oscilloscope, and autocorrelator.
4：Experimental Procedures and Operational Workflow:
The pump power is set, and the polarization controller is adjusted to switch the operating state of the laser. Polarization states and pulse dynamics are measured and analyzed.
5：Data Analysis Methods:
The study employs dispersion Fourier transform and ultrafast polarization measurement techniques to analyze pulse dynamics and polarization states.
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oscilloscope
WavePro 7300
LeCroy
Records the output pulse trace.
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band-pass filter
OTF-950
Santec
Used to filter out the center wavelength with a specific bandwidth.
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optical spectral analyzer
AQ6370D
YOKOGAWA
Measures the spectra of the output laser.
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erbium-doped fiber
EDFC-980-HP
Nufern
Used as the gain medium in the laser cavity.
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single-mode fiber
Part of the laser cavity with specific dispersion characteristics.
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polarization analyzer
PM1000
Novoptel
Measures all the polarization states of every roundtrip laser output.
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autocorrelator
pulseCheck
Measures the autocorrelation trajectories of each polarization-dependent pulsing procedure.
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