研究目的
Investigating the generation of ultrashort optical pulses in a fibre cavity with Kerr nonlinearity and normal dispersion using a model based on numerical solution of a nonlinear Schr?dinger equation.
研究成果
The study demonstrates that the proposed scheme can generate linearly chirped optical pulses with a spectral width of more than 25 nm at a wavelength of 1030 nm. The stability of the laser operation is sensitive to the splicing angle of the polarisation-maintaining fibre segments.
研究不足
The model disregards Raman scattering, which may be significant in passively mode-locked fibre lasers. The computational complexity and resource requirements are high due to the detailed numerical simulations.
1：Experimental Design and Method Selection:
The study uses a numerical solution of a nonlinear Schr?dinger equation to model the generation of ultrashort pulses in a fibre laser.
2：Sample Selection and Data Sources:
The model investigates the specific features of pulsed generation in a passively mode-locked laser based on nonlinear polarisation evolution in two segments of a polarisation-maintaining fibre.
3：List of Experimental Equipment and Materials:
The study involves simulations without physical equipment, focusing on theoretical models.
4：Experimental Procedures and Operational Workflow:
The methodology includes numerical simulations to analyze pulse generation and propagation in the fibre cavity.
5：Data Analysis Methods:
The analysis involves interpreting the simulation results to understand the pulse generation mechanism and characteristics.
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