The Research Of He-ne Laser Chaos Control Method

The chaos theory is one of the important development of nonlinear science, it reveals the ubiquitous complexity of nature. Sometimes chaotic motion is exactly what we need, but it may also interfere with the normal operation of the system, in this cases the chaos should be suppressed to the system back to orderly motion. Therefore, if chaos is very important in some situations, it is very important for purposeful generating and controlling chaos. There is rich chaotic phenomena in laser systems, the generation and control of laser chaos have become the key research topic in sciences. The He-Ne laser output has good direction, good monochromaticity, output power and wavelength stability and other characteristics, so it has been widely used and studies. Specific studies are as follows:Firstly, introduced the basic theory of lasers and chaos. Basis on the semi-classical theory, the single-mode inhomogeneous broadening standing wave laser equation was obtained. Pushed to a Class A kinetic equation of He-Ne laser and the feedback delay dynamic equations; Analyzed the chaotic characteristics of He-Ne laser; Discussed the impact of different feedback coefficients and delay on chaotic generation. Secondly, through the study of chaos control, proposed feedback phase periodical control method, established kinetic equations and theoretical models, analyzed the control of periodic state and chaotic state by using different wavelengths phase periodic control method.But then, Under appropriate control He-Ne laser can be made stable state into the chaotic state and the chaos can also be controlled to periodic states. However, it is difficult to achieve universal application because of its high cost, so there is theoretical analysis on the most of topics. According to the kinetic equation of He-Ne laser, established the kinetic equation of optical feedback, designed the analog circuit, the circuit achieve dynamic behavior of He-Ne laser. The chaos output of circuit simulation can be controlled to periodic state by changing the corresponding resistance value. Verified the effectiveness and reliability of circuit simulation.