Scattering Point In The High-power Solid State Laser Device Laser Transmission

The effect of obscuration can't be ignored in the high-power solid laser equipment, and we have found the destruct of obscuration to the actual equipment. It's very important to establish the obscuration's model and analyze its influence to the laser propagation. Based on this, I adopt the theory of probability and statistic to establish the obscuration's model; adopt the theory of diffraction to analyze the linear propagation of obscuration; adopt the theory of nonlinear paraxial equation to comprehend the nonlinear propagation of obscuration. The principal work is as follows:(1)We use the matlab software to establish the obscuration's model through analyzing the character of obscuration on the actual optical component. The model includes the obscuration's character of position, shape, scale, number, area percent, greyhound, and it also includes the sampling frequency of analyzing the obscuration and the area of optical component. The model is the foundation of this article, which also is the main part of this article.(2)Based on the theory of diffraction, we push over the Fraunhofer and Fresnel diffraction of obscuration. Moreover, the distribution of complex amplitude is given, and the rule is validated by the optical propagation software researched by CAEP.(3)Based on the theory of linear diffraction, the linear propagation of obscuration is analyzed through equivalent diffraction distances, Fresnel parameter, and obscuration's area percent by the optical propagation software. Such conclusion is given: shorten the Fresnel shu, shorten the obscuration's area percent and shorten the equivalent diffraction distances will improve the optical quality.(4)The nonlinear paraxial equation is understood to analyze the N slabs'hot-image rule. The appearance position of hot-image satisfied the rule of z2=z1-Lv, z2 is mean the image distance, z1 is mean the object distance, and Lv is mean the distance between the nonlinear medium. The theory is also validated by the optical propagation software. If N=1, then the nonlinear medium is only one, Lv=0, and it will satisfy the rule z2=z1.