研究目的
Investigating the generation of high-peak-power, femtosecond pulse trains and pulse doublets using a large-mode-area segmented-cladding fiber with exponentially decreasing dispersion.
研究成果
The study successfully demonstrates the generation of pulse trains and pulse doublets using an exponentially decreasing dispersion in a large-mode-area segmented-cladding fiber. The appropriate choice of dispersion rate can minimize differences among the peaks of the pulse train or achieve nearly equal peak power pulse doublets.
研究不足
The discussion is limited to 1550 nm wavelength, and the study is numerical, requiring experimental validation.
1：Experimental Design and Method Selection:
The study numerically demonstrates the generation of femtosecond pulse trains and doublets by exponentially decreasing the dispersion along the length of a segmented-cladding fiber. The nonlinear Schrodinger equation is used for simulating pulse evolution in the time domain.
2：Sample Selection and Data Sources:
A 71 kW, 100 fs Gaussian pulse is propagated through a 2 m long segmented-cladding fiber with axially varying dispersion.
3：List of Experimental Equipment and Materials:
Segmented cladding fiber with large mode area (1825 μm2) for single mode operation.
4：Experimental Procedures and Operational Workflow:
The dispersion is decreased exponentially along the fiber length, with different rates of change (m values: 0, 0.4, 0.8, 1.3) to tailor the pulse shape.
5：4, 8, 3) to tailor the pulse shape.
Data Analysis Methods:
5. Data Analysis Methods: The effect of dispersion and nonlinearity on pulse shaping is analyzed through simulation results.
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