Nature of diffraction and its a

摘要

Abstract: A new suggestion that there is a phase jump of $pi in the boundary wave is put forward in this paper. This suggestion may be a supplement of Huygens-Fresnel principle. Based on this new suggestion, a series of new beam was invented, both outside and inside laser cavity. Especially, a new CO$-2$/ laser with equivalent beam quality factor M$+2$/$-e$/ $LS 1 is achieved. It can be considered as the result of some controllable nonlinear self-focusing, and the physical background of deformed quantum mechanics.!15