Research On Array Correlation Laser Control And Transmission Characteristics

In recent years,with the increasing demand for laser technology,light manipulation has gradually become a hot spot in the field of laser.The degree of freedom of light fields manipulation mainly includes coherence,polarization and phase.Among them,the manipulation of coherent structure and its coupling mechanism with other degrees of freedom have received extensive attention and research in recent years.More and more studies show that new partially coherent beams have important applications in free optical communication,optical tweezers,optical imaging,data storage and other fields.In addition,multi degree of freedom complex spatial structure light fields have attracted great attention due to their important physical significance and wide application.Based on this,this subject mainly carries out the manipulation of coherent structure of light field,and expands the introduction of polarization and phase,studies the intrinsic correlation between the degrees of freedom of new light field,explores new characteristics of manipulation and transmission,and explores the accurate characterization and manipulation of complex structured light beam.The study shows that cosine-Gaussian correlation is a special array correlation.We have proven that the cosine-Gaussian correlated radially polarized beam have the ability to carry the twisted phase.Then the evolution of statistical parameters in the process of twisted cosine-Gaussian correlated radially polarized beam focusing is studied,and the influence of coherent structure and twisted phase on the statistical parameters of the beam is analyzed.Finally,the spectral frequency shift of multicolor twisted cosine-Gaussian correlated radially polarized beams during focusing is simulated.The results show that the intensity distribution,coherence distribution and polarization distribution of beams with twisted phase rotate during propagation.Spectral frequency shift is closely related to coherent structure and twisted phase.Finally,we loaded the vortex phase to partially coherent light,and then we designed the correlation structure of the beam to satisfy the non-negative qualitative condition of the correlation structure.We studied the focusing propagation characteristics of the beam through Collins integral formula,analyzed the intensity distribution and coherence distribution of the beam in the initial field and the focal plane,and found that it is feasible to design the correlation structure of the beam.By manipulating the coherent structure of the initial field vortex beam,the controllable control of the light intensity distribution at the focal plane is realized.Vortex beams with adjustable arrays are obtained,and a method to obtain the adjustable array vortex beams is provided.The research shows that complex structure light field can be designed quantitatively by accurate manipulation of coherent structure,polarization and phase.The research results not only enrich the basic theory of optics,but also have important applications in some fields such as free optical communication,particle manipulation,optical imaging,laser processing and lidar.