par Dubois, Frank 
;Emplit, Philippe ;Hugon, Olivier
Référence Optics Letters, 19, 7, page (433-435)
Publication Publié, 1994-04
;Emplit, Philippe ;Hugon, OlivierRéférence Optics Letters, 19, 7, page (433-435)
Publication Publié, 1994-04
Article révisé par les pairs
| Résumé : | We report on the generation of optical masks that permit the spatial shaping of a laser beam so that one can selectively excite single modes of a multimode parabolic graded-index optical fiber. The amplitude masks are determined by the analytical radial function of the fiber mode in the weakly guiding approximation. Phase reversal is encoded on the transparency through a shifted-grating technique. Effective injection and propagation of a single mode in a largely multimode fiber are shown as examples. |
