Effect of surface roughness on pumping characteristics in solar lasers
Annotatsiya
We studied the impact of laser rod surface roughness on pumping characteristics in the context of solar lasers. We propose a new approach for modeling light reflectance and transmission from rough surfaces using normal (Gaussian) distributions. We analyzed three modeling methodologies: one representing laser rod surfaces as specular (fully polished), another as diffusive (unpolished), and a third incorporating varying degrees of roughness parameterized by the standard deviation of the normal distribution. To validate these models, an experiment was conducted measuring the transmitted laser radiation from a Ce:Nd:YAG rod. Results indicate that specular models overestimate pumping efficiency by up to 3%, while diffusive models might underestimate it by up to 3.5%. Our work emphasizes the importance of incorporating realistic surface roughness characteristics for accurate modeling of pumping efficiency in solar-pumped.