In the experiments of Rayleigh laser guide star (LGS) for adaptive optics on altazimuth Coudé telescope, the technology of LGS launched and received in the common aperture using polarizing beam splitting scheme is researched.

Design of 2D Photonic crystal polarization splitters;

Optimal design of two-dimensional photonic crystal polarization splitters;

The design of a Si/SiO_2 photonic crystal omnidirectional polarization splitter at the center wavelength of λ=1.

From the above it was given that the nonlinearity makes the frequency-mixing output signals shift and undulate,and its main factors are the perfection degree of the optical system adjustment and the polarization splitting degree.

The application of polarizing beam splitter for projection display system was reviewed.

Analysis on polarizing aberration when partially polarized light penetrate lens;

The polarization change during transmission course was analyzed when the partially polarized light beam from an object passed CCD s optical system.

By investigating the polarization states of object light and reference light in Fresnel hologram,It is found that the linearly polarized laser becomes "partially polarized light" after it is scattered and diffusely reflected by the objects with different material surfaces.

With the description of design flow and working principle of polarization-nulling method,the affection of nonlinear effects on the performance of this method is analyzed quantitatively.