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介绍了连续波克尔透镜锁模固体激光器在半导体饱和吸收体中产生超短脉冲的结果。在考虑吸收体-脉冲相干相互作用的理论框架里解释了超短脉冲的产生。根据耦合广义Landau-Ginzburg方程和Bloch方程对相干吸收体构造了解析模型。研究发现,当KLM不存在时半导体吸收体会产生非2π-双曲正割脉冲的自感应透明,KLM存在时则产生超短2π-双曲正割脉冲,KLM的出现会消除掉吸收体的最小调制度的限制。
The results of the continuous-wave Kerr lens-mode-locked solid-state lasers generating ultra-short pulses in a semiconductor saturable absorber are introduced. The generation of ultrashort pulses is explained in the theoretical framework of the absorber-pulse coherent interaction. An analytical model of coherent absorber is constructed according to the coupled generalized Landau-Ginzburg equation and the Bloch equation. The study found that when KLM is absent, the semiconductor absorber generates a self-sensing, transparent, non-2π-hyperbolic secant pulse, which results in an ultrashort 2π-hyperbolic secant pulse in the presence of KLM. The appearance of KLM eliminates the smallest absorber Modulation restrictions.