Light Beam Analysis And Optimization Of Waveguide Optical Phased Array

Laser scanning in military and civilian field,such as laser scanning imaging, laserdisplay, light switch, laser printing, has a wide application requirements. Optical phasedarray is a kind of agile, rapid and accurate non-mechanical scanning technology. It is apossible one to resolve bottlenecks of laser scanning. Optical phased scanners based onoptical waveguide array is a new research direction of OPA. It has many merits such asfast response speed,low working voltage and large scanning area.Theory of waveguide optical phased array is discussed in detail. Based on theelectro-optic effect of optical waveguide crystal and the grating diffraction theory, thedistribution of radiation beam and the working principle of the optical waveguide arraybeam scanner has been studied in detail. Waveguide array is composed of non-uniformanisotropic medium. Based on the finite difference method for solving theelectromagnetic properties in the anisotropic media, the field characteristics ofanisotropic dielectric waveguide array are showed and the calculation of the Rayleighscattering properties for an anisotropic media target are developed. For the requirementof the sidelobe suppression, the optimized design of the waveguide array structure isinvestigated. Draw the design method of microwave antenna array optimization, thenon-uniform waveguide array structure is optimized by using the genetic algorithms. Inmeans of matlab, optimization calculation for optical Waveguide array is worked outconsidering the three kinds of waveguide array elements in space. The effects of thesidelobe compressions for optical waveguide with different structure are analysised. Thesimulation results show that this method can effectively reduce the sidelobe level.