公开(公告)号：EP2877884A2

公开(公告)日：2015-06-03

申请号：EP13739739.4

申请日：2013-07-24

申请人： CSEM Centre Suisse d'Electronique et de Microtechnique SA - Recherche et Développement

发明人： SQALLI, Omar ,  PIRES, David ,  BASSET, Guillaume ,  STALDER, Martin

IPC分类号： G02B6/34 ,  F21V8/00

CPC分类号： G02B6/34 ,  G02B6/2793 ,  G02B6/29323 ,  G02B6/29329 ,  G02B6/29397

摘要： The present invention concerns a method for constructing a light coupling system wherein a grating is manufactured on the surface of a multimode waveguide and defines the entrance of the waveguide for an incident light beam, said grating comprising a repetition of patterns. The grating is defined by a set of parameters comprising: • grating period (P), separating two adjacent patterns, • grating depth (d) between the highest and the lowest point of the pattern, • incident angle mean value (θ) of the incident light with respect to the waveguide. The method comprises a step of optimization of the set of parameters to obtain an optimized second set of parameters, in order to obtain a transmission efficiency (Ce) of the incident light into said waveguide for the first or the second diffractive order exceeding 35% for unpolarized light, or exceeding 50% for polarized light, at a given wavelength of the incident light.