KEYWORDS: Analytical research, Laser systems engineering, Zemax, MATLAB, High power lasers, Monte Carlo methods, Error analysis, Mirrors, Interfaces, Statistical analysis
Laser transmission system is important in high power solid-state laser facilities and its function is to transfer and focus the light beam in accordance with the physical function of the facility. This system is mainly composed of transmission mirror modules and wedge lens module. In order to realize the precision alignment of the system, the precision alignment of the system is required to be decomposed into the allowable range of the calibration error of each module. The traditional method is to analyze the error factors of the modules separately, and then the linear synthesis is carried out, and the influence of the multi-module and multi-factor is obtained. In order to analyze the effect of the alignment error of each module on the beam center and focus more accurately, this paper aims to combine with the Monte Carlo random test and ray tracing, analyze influence of multi-module and multi-factor on the center of the beam, and evaluate and optimize the results of accuracy decomposition.
We present a transmitted wavefront measuring system of large optic modules based on Shack Hartmann wavefront sensor, aiming to perform optical metrology for rectangular laser slabs arranged in a 4-high by 1-wide matrix. This system is developed to perform high-accuracy measurement for extremely high quality optical components needed for inertial confinement fusion (ICF) facility with wavefront accuracy better than 0.4λ (peak to valley, λ=632.8nm). Sensitivity analysis is put forward to specified tolerances of components to ensure the built system will perform as desired. Experiments results showed that added wavefront of each slab of 32 matrix modules is controlled under 1λ successfully.
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