研究目的
Investigating the formation and dynamics of dispersion-managed solitons (DMSs) in an all-fiber laser passively mode-locked by a 45° tilted fiber grating near the zero-dispersion regime.
研究成果
The study successfully observes various DMS molecules in a 45° TFG based near-zero-dispersion fiber laser, enriching the comprehension of soliton dynamics. The internal dynamics of dual-pulse and triple-pulse DMS molecules are researched by DFT technique, providing insights into soliton dynamics and perspectives for ultrafast fiber laser.
研究不足
The study is limited to the observation of soliton dynamics within a specific fiber laser setup and does not explore the broader applicability of the findings to other laser systems or materials.
1：Experimental Design and Method Selection:
The study involves the development of a near-zero-dispersion passively mode-locked fiber laser based on a 45° TFG. The methodology includes adjusting the intra-cavity polarization state and the pump power to observe DMS singlets and multi-pulse DMS molecules.
2：Sample Selection and Data Sources:
The experiment utilizes a fiber laser setup with specific lengths of erbium-doped fiber (EDF) and single mode fiber (SMF).
3：List of Experimental Equipment and Materials:
Equipment includes a reflecting wavelength division multiplexer (WDM)/isolator (ISO) hybrid module, a 45° TFG, polarization controllers (PCs), a 50:50 output coupler (OC), an electrical spectrum analyzer (ESA), an optical spectrum analyzer (OSA), an autocorrelator, a 25 GHz photodetector (PD), and a 20 GHz real-time oscilloscope (OSC).
4：Experimental Procedures and Operational Workflow:
The process involves adjusting the pump power and rotating the paddles of the PCs to observe different DMS molecules.
5：Data Analysis Methods:
The study employs dispersive Fourier transformation (DFT) technique for real-time spectroscopy to explore complex soliton dynamics.
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erbium-doped fiber
Used as the gain medium in the fiber laser.
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single mode fiber
Used in the fiber laser setup for pulse propagation.
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45° tilted fiber grating
Used as the mode-locking initiator in the fiber laser.
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polarization controllers
Used to adjust the intra-cavity polarization states.
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output coupler
50:50
Used to output the lasing emission.
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electrical spectrum analyzer
Used to monitor the radio frequency (RF) spectra.
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optical spectrum analyzer
Used to monitor the optical spectra.
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autocorrelator
Used to measure the autocorrelation trace of the DMSs.
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photodetector
25 GHz
Used to monitor the pulse train for DFT.
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real-time oscilloscope
20 GHz
Used to monitor the pulse train for DFT.
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