Theoretical Numerical Simulation Of Femtosecond Solid State Lasers With Saturable Absorber

Femtosecond pulse laser as a powerful tool for research in basic science andapplied science, in many research fields play the its uniquely role. Narrow pulse, highpeak power pulsed laser with a wide range of applications in the field of opticalcommunications, medicine, ultra-fine processing, nonlinear frequency conversion, etc.,the use of the saturable absorber, the solid-state lasers with high conversion efficiency,long working life, simple structure, stable performance and so many advantages,based on the above advantages, the femtosecond pulse technology in recent years hasmade great progress, especially how to get a more narrow width of the pulse, andbecome a research focus. Ultrashort laser pulses work in the technology andapplication of a high level of development, but its theory of operation of the processof explanation and description is still not perfect, we can not clearly understand anddescribe the experience of the Kerr-lens mode-locked laser The description of thisprocess we need to make a complete mathematical model. At present, the domesticuse of the saturable absorber to generate ultrashort pulses in the femtosecond pulsesolid-state laser mechanism for theoretical research and numerical simulation reportedmore curiosities.The key issues discussed above, the main content and innovation are summarizedas follows: theory of a saturable absorber, the Stark effect, the group velocitydispersion and self-phase modulation pulse generation, amplification, pulse stabilityand frequency conversion. Discussion and absorption of the self-mode-lockingmechanism of the body of solid-state laser, the establishment of the body in thefour-level saturated absorption in a limited range in the case of continuous pumpparameter changes can be effectively passively mode-locked solid-state laser system.Incentive to rely on the express effect of the Stark shift of the quantum levelabsorber, study the shortest pulse width of the absorption with the pulse of the limit of minimum limit. By Landau-Ginzburg equation to analyze the interaction of phaseself-modulation and group velocity dispersion, and to analyze its impact on the laserstability and mode-locking efficiency. Computer program written by Maple13broadband solid-state laser system, numerical simulation and analysis, and discussionof the oscillatory dynamics of passive mode-locking of the modulator in a wide rangeof resonance and non-resonant nonlinear optical processes based on solid-state laserand an integrated approach and study clamping efficient use of the law. We alsostudied the soliton of the saturable absorber to the body solid-state lasers based onself-consistent field theory, and discuss a variety of soliton instability, namely theconversion from the femtosecond to picosecond-generation (picosecond collapse).This article has been exact analytical expression and progresse on theoreticalexplanation and describution of the operation process of the femtosecond solid statelasers with saturable absorber.