研究目的
To determine the mechanism of formation and stabilization of noiselike pulses in ?bers lasers with anomalous dispersion.
研究成果
The space-time localization and stabilization of noiselike pulses is explained by the suppression of single solitons located outside the main noiselike pulse. The mechanism involves the disappearance of solitons from the generation when their peak intensity falls below a critical value, due to oscillations induced by the anomalous dispersion and focusing cubic-quintic nonlinearity of the refractive index.
研究不足
The study focuses on ?ber lasers with anomalous dispersion and does not explore the full range of possible operating regimes in ?ber lasers. The model used is simplified and may not capture all aspects of real-world laser dynamics.
1：Experimental Design and Method Selection:
The study uses a normalized complex equation with cubic-quintic nonlinearity to describe the ?eld evolution in a unidirectional ring laser with a uniformly distributed intracavity medium.
2：Sample Selection and Data Sources:
The laser parameters used in the numerical simulation are as close as possible to those of real ?ber lasers operating in the noiselike pulse regime.
3：List of Experimental Equipment and Materials:
The laser includes an ampli?er, a frequency ?lter, an output coupler, and an element creating nonlinear losses to form ultrashort pulses.
4：Experimental Procedures and Operational Workflow:
The numerical simulation involves tracing the evolution of solitons which happen to be outside a noiselike pulse due to the stochastic interaction of intrapulse solitons forming the pulse.
5：Data Analysis Methods:
The analysis includes examining the dependence of the total gain including losses on the intensity of the solitons forming a noiselike pulse.
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