Angular-modulated spatial distribution of ultrahigh-order modes assisted by random scattering
Kan Xue-Fen1, Yin Cheng1, 2, †, Xu Tian3, Chen Fan4, Li Jian1, Han Qing-Bang1, Chen Xian-Feng2
       

(color online) Mechanism of the intra-mode and inter-mode coupling. (a) The wave vector k0 of the incident beam and the in-plane propagation constant β in the three-dimensional coordinate system. (b) The intra-mode and inter-mode coupling on the XY plane.