Theoretical Research And Instrumental Development Of Absolute Ranging Based On Electro-optical Modulation Optical Frequency Comb

With its special optical properties,optical frequency combs have brought innovative advances in many fields such as precision spectroscopy,metrology and Indtstry.Based on the optical frequency combs generated by electro-optical modulation,this thesis targetted to achieve the accurrate and fast absolute distance measurement and carriedout important research and experiments on the establishment of theoretical models,the realization of instrumentation and the verification of improved ranging systems.The theoretical model based on the principle of electro-optical modulation was proposed and conbributed to the futher research of the mathematical analysis of polarization control,spectral broadening and phase noise which provided theoretical support for the experiment.To realize the upgrade from the research and development stage to the engineering and instrumentation stageof the electro-optical modulation optical frequency comb,the design criteria and instrumentalization based on this method were proposed.Optical frequency combs generation module based on the electro-optical modulation was completed and tested according tothe theory of system stability and reliability.According to the spetial characteristics of the optical frequency comb,an improved absolute distance measurement scheme was proposed based on the traditional multi-wavelength interferometry system.Through the experimental verification of the long guide rail and the analysis of its uncertainty,this improved system achieved the measurement with high measurement accuracy,high non-ambiguous range and high dynamic measurement rate.