Special Neodymium Glass Components Of Magnetorheological Processing Technology Research

Due to the construction of large laser inertial confinement fusion facility at home and abroad, phosphate laser glass, especially laser neodymium glass has developed unprecedentedly. Both in NIF and SHENGUANG project, neodymium glass by virtue of its own excellent spectral characteristics, the small nonlinear coefficient, the large laser gain coefficient and other special properties has been widely used in strong laser applications. Many research institutions have carried out a deep study of the research and the manufacturing process of the laser neodymium glass and also have their own sophisticated preparation process. The transmitted wavefront of the neodymium optics polished by the traditional ways is poor. New ways and processes to improve the transmitted wavefront is necessary.Magnetor-heological finishing (MRP) has developed rapidly at home and abroad in recent years. For its special material removal mechanism and deterministic processing characteristics, it has been widely applied to various optical materials processing. In this research, we combine the phase compensation with MRP to polish the laser neodymium glass. The main research includes:1. The physicochemical property and crystal structure of Nd crystal. Analyse its refractive index inhomogeneity and the transmitted wavefront distortion. Explain the limitation of traditional optical fabrications in correcting this distortion. Try to combine the phase compensation with MRP in polishing this kind of optics.2. Material removal mechanism in MRF process for Nd crystal. Combine several material-removed theories with characteristics of Nd crystal, analyze the removal functions models of MRF.3. The polishing parameters of MRP for Nd crystal. Try to detect the removal rate and stability of the MR fluid which will be used for polishing Nd crystal and also establish the evaluative targets on polishing parameters.4. A high precision and more efficient fabrication technique for improving the transmitted wavefront is established. By combining MRP with wavefront compensation, we succeed in correcting transmitted wave-front distortion of Nd crystal.