Study on spherical aberration in the laser optical system

The effect of spherical aberration on the radius of image beam waist in the design of laser optical system is discussed in detail, and the relationship between the spherical aberration and the image beam waist radius in the laser optical system is deduced. Radius variation of image beam waist due to spherical aberration which varies with the position of object beam waist and the optical system focus is analyzed by the form of curve. The analysis results indicate that the effect of spherical aberration on the radius of image beam waist should be considered according to the position of object beam waist in the design of a laser optical system. Finally, a design example of the optical system used for atmospheric laser communication system is given to illustrate the effect of spherical aberration on the image beam waist.